a student proposes the following step of a mechanism. why would an expert question this mechanism step? 3 a b → 2 c

Answers

Answer 1

An expert might question the proposed mechanism step due to:
1. Lack of reaction conditions
2. Lack of experimental evidence
3. Thermodynamic feasibility
4. Kinetic feasibility
5. Stereochemical considerations.

an expert might question the proposed step of the mechanism:

1. Lack of reaction conditions: The expert may question the proposed mechanism step because there is no mention of the reaction conditions. Without knowing the reaction conditions, it is impossible to predict whether the proposed mechanism step is feasible or not.

2. Lack of experimental evidence: The expert may question the proposed mechanism step if there is no experimental evidence to support it. Experimental evidence is necessary to validate any proposed mechanism step.

3. Thermodynamic feasibility: The expert may question the proposed mechanism step if it violates the laws of thermodynamics. The proposed step should be energetically favorable and should not require a large input of energy.

4. Kinetic feasibility: The expert may question the proposed mechanism step if it violates the laws of kinetics. The proposed step should be consistent with the rate of the overall reaction.

5. Stereochemical considerations: The expert may question the proposed mechanism step if it violates stereochemical considerations. The proposed step should be consistent with the observed stereochemistry of the reaction products.

These are just a few possible reasons why an expert might question the proposed step of the mechanism.
Visit to know more about thermodynamic feasibility:-

https://brainly.com/question/31252614

#SPJ11


Related Questions

which environmental problem would impact most minnesotans equally?
a. toxicity of agriculture, pesticides.
b. Disruption of wildlife from open pit mine’s.
c. Water pollution from fracking.
d. Climate change.

Answers

The environmental problem that would impact most Minnesotans equally is Climate change. The correct option is d.

Climate change is a global issue that affects all regions and populations, regardless of location or industry. Its impacts, such as extreme weather events, changes in precipitation patterns, and rising temperatures, can have far-reaching consequences on the environment, human health, and the economy. In Minnesota, climate change can affect agriculture, forestry, tourism, and other industries, and also impact public health through increased heat waves and worsening air quality. Therefore, addressing climate change requires a collective effort from all communities and sectors . Hence, option d is the correct answer.

To know more about Climate change, here

brainly.com/question/28779953

#SPJ1

Help what’s the answer?

Answers

Can you show the choices?

In this last step, return to Step 10 in your Lab Guide to calculate the error between your calculated specific heat of


each metal and the known values in Table C. Follow the directions given in your Lab Guide, using this formula:


(calculated metal - known (metal)


Error = 100


known Cmetal

Answers

To calculate the error between your calculated specific heat of each metal and the known values in Table C, you should use the following formula: Error = ((calculated specific heat of metal - known specific heat of metal) / known specific heat of metal) * 100.

In the last step of the lab, you need to calculate the error between your calculated specific heat of each metal and the known values in Table C. To do this, you will return to Step 10 in your Lab Guide and follow the directions provided. The formula you will use is:

Error = (calculated metal - known metal) / (known Cmetal) x 100

This formula will give you the percentage error between your calculated values and the known values in Table C. To calculate the error for each metal, simply plug in the values for the specific heat you calculated and the known value for that metal from Table C. Make sure to follow the directions carefully in your Lab Guide to ensure accurate calculations.

Learn more about specific heat at https://brainly.com/question/30403247

#SPJ11

Fossil fuels are the largest contributor of the ___________ gas carbon dioxide. this causes health and environmental issues.



question 2 options:



inert




greenhouse




poisonous




blue

Answers

Fossil fuels are the largest contributor of the  greenhouse  gas carbon dioxide,this causes health and environmental issues.

This causes health and environmental issues as it contributes to global warming and climate change. The burning of fossil fuels such as coal, oil and gas releases carbon dioxide into the atmosphere, which traps heat and leads to the Earth's temperature rising.

This can cause extreme weather events, rising sea levels, and harm to ecosystems and wildlife. Additionally, carbon dioxide can contribute to respiratory and cardiovascular health issues in humans and animals.

Therefore, it is important to transition to renewable energy sources in order to reduce our reliance on fossil fuels and mitigate the impacts of climate change.

To know more about global warming click on below link:

https://brainly.com/question/12908180#

#SPJ11

One rainy day, a car with a mass of 1 250 kg moving at 20. 0 m/s hits the rear end of another car with a mass

of 1 610 kg moving at 8. 0 m/s in the same direction. What is the final velocity of the two cars if they stick

together? What is the change in kinetic energy of the system? What type of collision occurred in the system?â

Answers

The final velocity of two cars that stick together after a collision is 18.5 m/s. The change in kinetic energy of the system is 322,505 J, and an inelastic collision occurred.

To solve this problem, we can use the principle of conservation of momentum, which states that the total momentum of a closed system remains constant if no external forces act on it.

First, we calculate the initial momentum of the system:

p_initial = m1 * v1 + m2 * v2

p_initial = 1250 kg * 20.0 m/s + 1610 kg * 8.0 m/s

p_initial = 40,000 kg m/s + 12,880 kg m/s

p_initial = 52,880 kg m/s

Next, we calculate the total mass of the system after the collision:

m_total = m1 + m2

m_total = 1250 kg + 1610 kg

m_total = 2860 kg

Since the two cars stick together after the collision, we can assume that they move as one object. Therefore, the final velocity of the two cars can be calculated as follows:

v_final = p_initial / m_total

v_final = 52,880 kg m/s / 2860 kg

v_final = 18.5 m/s

To calculate the change in kinetic energy of the system, we can use the formula:

ΔK = K_final - K_initial

The initial kinetic energy of the system can be calculated as:

K_initial = 1/2 * m1 * v1² + 1/2 * m2 * v2²

K_initial = 1/2 * 1250 kg * (20.0 m/s)² + 1/2 * 1610 kg * (8.0 m/s)²

K_initial = 400,000 J + 51,520 J

K_initial = 451,520 J

The final kinetic energy of the system can be calculated as:

K_final = 1/2 * m_total * v_final²

K_final = 1/2 * 2860 kg * (18.5 m/s)²

K_final = 774,025 J

Therefore, the change in kinetic energy of the system is:

ΔK = K_final - K_initial

ΔK = 774,025 J - 451,520 J

ΔK = 322,505 J

Since the total kinetic energy of the system is not conserved, and some of it is converted to other forms of energy such as heat and sound, we can conclude that an inelastic collision occurred in the system.

To know more about the kinetic energy refer here :

https://brainly.com/question/26472013#

#SPJ11

Chemistry. Pls help
The lettered choices below refer to questions 9-11. A lettered choice may be used once, more than once, or not at all.
A. PQ B. P2Q3 C. PQ3 D. P3Q E. PQ2

Answers

Answer:

A: PQ

Explanation:

How do I solve all of these?

Answers

A. The volume (in L) is 12.80 L

B. The mole is 0.035 mole

C. The temperature is 407.57 °C

D. The pressure is 126.98 atm

A. How do i determine the volume?

The volume can be obtained as follow:

Pressure (P) = 5.44 atmNumber of mole (n) = 2 molesTemperature (T) = 151 °C = 151 + 273 = 424 KGas constant (R) = 0.0821 atm.L/molKVolume (V) =?

PV = nRT

5.44 × V = 2 × 0.0821 × 424

Divide both sides by 5.44

V = (2 × 0.0821 × 424) / 5.44

Volume (V) = 12.80 L

B. How do i determine the mole?

The number of mole can be obtained as follow:

Pressure (P) = 0.250 atmVolume (V) = 1.80 LTemperature (T) = 155 KGas constant (R) = 0.0821 atm.L/molKNumber of mole (n) = ?

PV = nRT

0.250 × 1.80 = n × 0.0821 × 155

Divide both sides by (0.0821 × 155)

n = (0.250 × 1.80) / (0.0821 × 155)

Number of mole (n) = 0.035 mole

C. How do i determine the temperature?

The temperature can be obtained as follow:

Pressure (P) = 4.47 atmVolume (V) = 26 LGas constant (R) = 0.0821 atm.L/molKNumber of mole (n) = 2.08 molesTemperature (T) = ?

PV = nRT

4.47 × 26 = 2.08 × 0.0821 × T

Divide both sides by (2.08 × 0.0821)

T = (4.47 × 26) / (2.08 × 0.0821)

T = 680.57 K

Subtract 273 to obtain answer in °C

T = 680.57 - 273 K

Temperature (T) = 407.57 °C

D. How do i determine the pressure?

The pressure can be obtained as follow:

Volume (V) = 2.25 LNumber of mole (n) = 10 molesTemperature (T) = 75 °C = 75 + 273 = 348 KGas constant (R) = 0.0821 atm.L/molKPressure (P) = ?

PV = nRT

P × 2.25 = 10 × 0.0821 × 348

Divide both sides by 2.25

P = (10 × 0.0821 × 348) / 2.25

Pressure (P) = 126.98 atm

Learn more about number of mole:

https://brainly.com/question/29927685

#SPJ1

3. Suppose you had titrated your vinegar sample with barium hydroxide instead of sodium hydroxide:


Ba(OH)2(aq)+2CH3COOH(aq)⟶Ba(CH3COO)2(aq)+2H2O(l)


Consider a 0. 586 M aqueous solution of barium hydroxide,


What volume (in mL) of 0. 586 M Ba(OH)2 solution are required to neutralize 10 ml of vinegar containing 2. 78 g of acetic acid?

Answers

39.4 mL of 0.586 M Ba(OH)2 solution is required to neutralize 10 mL of vinegar containing 2.78 g of acetic acid.

The balanced chemical equation for the reaction between barium hydroxide and acetic acid is:

Ba(OH)2(aq) + 2CH3COOH(aq) ⟶ Ba(CH3COO)2(aq) + 2H2O(l)

The molar mass of acetic acid (CH3COOH) is 60.05 g/mol.

First, we need to determine the moles of acetic acid present in 10 mL of vinegar:

molar mass of acetic acid = 60.05 g/mol

mass of acetic acid in 10 mL of vinegar = 2.78 g

moles of acetic acid = mass/molar mass = 2.78 g / 60.05 g/mol = 0.0463 mol

From the balanced chemical equation, we see that 1 mole of Ba(OH)2 reacts with 2 moles of CH3COOH. Therefore, the moles of Ba(OH)2 required to react with 0.0463 mol of CH3COOH is:

moles of Ba(OH)2 = (0.0463 mol CH3COOH) / 2 = 0.0231 mol Ba(OH)2

Now, we can use the definition of molarity to find the volume of 0.586 M Ba(OH)2 solution needed to provide 0.0231 mol Ba(OH)2:

Molarity = moles of solute / volume of solution in liters

volume of solution in liters = moles of solute / Molarity

volume of Ba(OH)2 solution needed = 0.0231 mol / 0.586 mol/L = 0.0394 L

Finally, we convert the volume of Ba(OH)2 solution from liters to milliliters:

volume of Ba(OH)2 solution needed = 0.0394 L * (1000 mL/L) = 39.4 mL

Therefore, 39.4 mL of 0.586 M Ba(OH)2 solution is required to neutralize 10 mL of vinegar containing 2.78 g of acetic acid.

To know more about chemical equation refer here:

https://brainly.com/question/30087623

#SPJ11

(07. 05 MC)



The volume of a reaction vessel with gaseous reactants is lowered to one-fourth of its original volume. What will happen to the rate of the reaction?



It will increase because the concentration of the reactants increases.


It will decrease because the concentration of the reactants decreases.


It will increase because the gaseous particles are moved farther apart.


It will decrease because the gaseous particles are brought closer together

Answers

The rate of the reaction will increase because the concentration of the reactants increases.

When the volume of a reaction vessel with gaseous reactants is reduced to one-fourth of its original volume, the gaseous particles are brought closer together. This results in an increased concentration of the reactants, as there are more particles in a smaller space.

Higher concentrations of reactants lead to a greater likelihood of successful collisions between reactant particles, which in turn leads to an increased rate of the reaction.

So, by decreasing the volume and increasing the concentration of reactants, you effectively speed up the reaction rate.

To know more about rate of the reaction click on below link:

https://brainly.com/question/30546888#

#SPJ11

A solution of 0. 600M HCl is used to titrate 15. 00 mL of KOH solution. The endpoint of


titration is reached after the addition of 27. 13 mL of HCI. What is the concentration of


the KOH solution?


9. 000M


O 1. 09M


O 0. 332M


0 0. 0163M

Answers

A solution of 0. 600M HCl is used to titrate 15. 00 mL of KOH solution. The endpoint of titration is reached after the addition of 27. 13 mL of HCI. The concentration of the KOH solution is (b) 1.09 M.

To solve this problem, we can use the balanced chemical equation for the reaction between HCl and KOH:

HCl + KOH → KCl + H₂O

From the balanced equation, we can see that one mole of HCl reacts with one mole of KOH.

Given that 0.600 M HCl is used and 27.13 mL is added to reach the endpoint, we can calculate the number of moles of HCl used:

moles HCl = M x V = 0.600 M x 0.02713 L = 0.01628 mol HCl

Since the reaction is 1:1, there must be 0.01628 mol of KOH in the 15.00 mL solution. We can calculate the concentration of KOH as follows:

Molarity = moles / volume

Molarity = 0.01628 mol / 0.01500 L = 1.09 M

Therefore, the concentration of the KOH solution is (b) 1.09 M.

To know more about the titration refer here :

https://brainly.com/question/31309007#

#SPJ11

_____KOH (aq) + ____H3PO4 (aq) → ___K3PO4 (aq) + __H2O (l)

To balance the equation, the coefficient for KOH should be:

A. 2

B. 1

C. 6

D. 3

Answers

Answer:

Answer: B. 1

Explanation:

I hope this helps you

how do you read an electron dot diagram?

Answers

When reading an electron dot diagram, you can determine the number of valence electrons an atom has and use that information to predict how it will bond with other atoms. Atoms tend to form bonds in order to achieve a full outer shell of electrons, which is the most stable arrangement. By looking at the number of dots in the electron dot diagram, you can predict how many bonds an atom is likely to form and what types of atoms it will bond with.

To read an electron dot diagram, you first need to understand what it represents. An electron dot diagram, also known as a Lewis structure, shows the number of valence electrons that an atom has. Valence electrons are the electrons in the outermost energy level of an atom and are involved in chemical bonding.

The dot diagram shows the symbol for the element surrounded by dots representing the valence electrons. Each dot represents one electron, and the dots are placed around the symbol in pairs, with no more than two dots on each side.

For example, carbon has four valence electrons, so its electron dot diagram would show four dots surrounding the symbol for carbon. Nitrogen, on the other hand, has five valence electrons, so its electron dot diagram would show five dots.

For more such questions on electron

https://brainly.com/question/11316046

#SPJ11

How many grams of sulfuric acid (h2so4) are dissolved in a 2 liter solution that is 18 molar?

Answers

There are 3530.88 grams of sulfuric acid (H₂SO₄) dissolved in a 2-liter solution that is 18 molar.

To calculate the grams of sulfuric acid (H₂SO₄) dissolved in a 2-liter solution that is 18 M (molar), you can follow these steps:

1. Determine the moles of H₂SO₄ in the solution:
Moles of H₂SO₄ = Molarity × Volume of solution
Moles of H₂SO₄ = 18 M × 2 L = 36 moles

2. Calculate the grams of H₂SO₄ using the molar mass:
Grams of H₂SO₄ = Moles × Molar mass of H₂SO₄
The molar mass of H₂SO₄ = (2 × H) + (1 × S) + (4 × O) = (2 × 1.01) + (32.07) + (4 × 16.00) = 98.08 g/mol

3. Multiply the moles of H₂SO₄ by its molar mass:
Grams of H₂SO₄ = 36 moles × 98.08 g/mol = 3530.88 grams

So, 3530.88 grams of sulfuric acid (H₂SO₄) are dissolved in a 2-liter solution that is 18 molar.

Learn more about sulfuric acid at https://brainly.com/question/10220770

#SPJ11

A gas at 850. mmHg occupies 1.5 L. The temperature is raised from 15 °C to 35 °C
causing the volume to change to 2.5 L. What is the final pressure of the gas?

Answers

The final pressure of the gas is approximately 545.4 mmHg when the temperature is raised from 15 °C to 35 °C.

What is the final pressure of the gas?

Combined gas law states that "the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.

It is expressed as;

P₁V₁/T₁ = P₂V₂/T₂

Given that:

Initial volume V₁ = 1.5LInitial pressure P₁ = 850 mmHgInitial temperature T₁ = 15°C = 15 + 273.15 = 288.15KFinal volume V₂ = 2.5LFinal temperature T₂ = 35°C = 35 + 273.15 = 308.15KFinal pressure P₂ = ?

Subtsitute our given values into the expression above.

P₁V₁/T₁ = P₂V₂/T₂

P₁V₁T₂ = P₂V₂T₁

P₂ = ( P₁V₁T₂ ) / ( V₂T₁ )

P₂ = ( 850 mmHg × 1.5L × 308.15K ) / ( 2.5L × 288.15K )

P₂ = 545.4 mmHg

Therefore, the final pressure is 545.4 mmHg.

Learn more about the combined gas law here: brainly.com/question/25944795

#SPJ1

9. Arrange the following ions in terms of increasing atomic radius (arrange then increasing from left [smallest] to right [largest]): Ca2+, K+, Rb+, Sr2+, Na+​

Answers

The ions arranged in terms of increasing atomic radius from left to right are: Ca²⁺, Sr²⁺, Na⁺, K⁺, Rb⁺.

As we move from left to right across the periodic table, due to the increasing nuclear charge the number of protons in the nucleus increases, pulling the electrons closer to the center and decreasing the atomic radius. However, as you move down a group, the number of electron shells increases, which increases the distance between the nucleus and outermost electrons, increasing the atomic radius.

Cations (positively charged ions) have smaller radii than their corresponding neutral atoms due to the loss of electrons and increased effective nuclear charge. Ca²⁺, Sr²⁺ have a +2 charge and; K⁺, Rb⁺, and Na⁺ have a +1 charge. Higher charge leads to a smaller atomic radius.

Ca²⁺, Sr²⁺  are located in Group 2, while K⁺, Rb⁺, and Na⁺ are located in Group 1 of periodic table. Arrange the ions based on their positions in the periodic table and their charges.

Based on these factors, the correct order of ions in terms of increasing atomic radius is: Ca²⁺ (smallest), Sr²⁺, Na⁺, K⁺, and Rb⁺ (largest).

To learn more about atomic radius visit:

https://brainly.com/question/15255548

#SPJ11

Calculate the mass of argon gas required to fill 20. 4-L container to a pressure of 1. 09 atm at 25C

Answers

The required mass of argon gas to completely fill a 20.4 L container to an atmospheric pressure of 1.09 atm at 25°C is 37.0 g.

The Volume of the container = 20.4 L

Temperature =  25 degrees

Pressure  = 1. 09 atm

To calculate the mass of the Argon gas, we need to use the ideal gas law equation.

PV = nRT

n = PV/RT

Assuming universal gas constant R=  0.0821 L·atm/(mol·K).

Converting temperature degrees to Kelvin scale

T = 25°C + 273.15 = 298.15 K

Substituting the above values, we get:

n = (1.09 atm)*(20.4 L)/(0.0821 L·atm/mol·K)*(298.15 K)

n = 0.926 mol

The molar mass of argon = 39.95 g/mol,

The mass of argon needed to serve the container is:

0.926 mol × 39.95 g/mol = 37.0 g

Therefore,  we can infer that the mass of argon gas required is 37.0 g.

To learn more about the Mass of Argon gas

https://brainly.com/question/4239844

#SPJ4

∆E = −33 kJ/mol Ea = 20 kJ/mol What is E a′ ?
Answer in units of kJ/mol.

Answers

The value of Ea′ is -53 kJ/mol, and it represents the energy released during the chemical reaction.

The given values ∆E = −33 kJ/mol and Ea = 20 kJ/mol represent the activation energy and the change in energy, respectively, for a chemical reaction. The activation energy, Ea, is the minimum energy required for the reaction to occur, while the change in energy, ∆E, represents the difference between the energy of the reactants and the energy of the products.

The relationship between the activation energy, Ea, and the change in energy, ∆E, can be expressed using the equation: ∆E = Ea + Ea′ where Ea′ represents the energy released during the reaction. Since the change in energy and the activation energy are given, we can rearrange the equation to solve for Ea′: Ea′ = ∆E - Ea

Substituting the given values, we get: Ea′ = −33 kJ/mol - 20 kJ/mol = -53 kJ/mol. Therefore, the value of Ea′ is -53 kJ/mol. This negative value indicates that the reaction is exothermic, meaning that it releases energy as it proceeds. The magnitude of the value (-53 kJ/mol) indicates that the energy released during the reaction is significant.

In summary, the value of Ea′ is -53 kJ/mol, and it represents the energy released during the chemical reaction. This value can be calculated using the equation Ea′ = ∆E - Ea, where ∆E is the change in energy and Ea is the activation energy.

For more such on energy visit:

https://brainly.com/question/1634438

#SPJ11

Assume you have 5. 0g of mg(s) reactant. calculate how much hcl(aq) you would need to use in order to ensure that hcl is not the limiting reactant. your final answer should be in ml of hcl.


a. 82ml hcl


b. 41ml hcl


c. 410ml hcl


d. 205ml hcl






assume you have 5. 0g of mgo(s) reactant. calculate how much hcl(aq) you would need to use in order to ensure that hcl is not the limiting reactant. your final answer should be in ml of hcl.


a. 50. ml hcl


b. 25ml hcl


c. 250ml hcl


d. 125 ml hcl

Answers

The amount of HCl(aq) required to ensure that it is not the limiting reactant when reacting with 5.0g of MgO(s) depends on the mole ratio of the reaction.

The mole ratio of the reaction is 1 mole of HCl for every 1 mole of MgO, therefore, 0.5 moles of HCl is required for the reaction.

To determine the volume of HCl(aq) required for the reaction, the molarity of the solution must be known. Assuming that the molarity of the solution is 2 mol/L, the required volume of HCl(aq) would be 0.5 moles/2 mol/L = 0.25 L or 250mL of HCl(aq).

To ensure that HCl(aq) is not the limiting reactant, at least 250 mL of HCl(aq) should be used in the reaction.

Know more about  Mole ratio here

https://brainly.com/question/15288923#

#SPJ11

2. If 13. 5 L of nitrogen gas reacts with 17. 8 L of hydrogen gas at SIP, according to the following reaction, what mass of ammonia would be produced?
N2
*
3 H2 - 2 NH3

Answers

The mass of ammonia that will be produced according to the reaction given would be 17.9 g.

Stoichiometric problem

The balanced equation for the reaction is:

[tex]N_2 + 3H_2 -- > 2NH_3[/tex]

Also:

PV = nRT

The number of moles of nitrogen and hydrogen involved in the reaction can be calculated as:

n(N2) = (1x 13.5) / (0.08206) = 0.526 moln(H2) = (1x 17.8) / (0.08206) = 0.698 mol

From the balanced equation, we can see that the limiting reactant is nitrogen since it reacts with 3 moles of hydrogen to produce 2 moles of ammonia.

n(NH3) = (2 mol NH3 / 1 mol N2) x 0.526 mol N2 = 1.05 mol NH3

Mass of ammonia = mole x molar mass

                              = 1.05 mol x 17.03 g/mol

                              = 17.9 g

In other words, the mass of ammonia produced is 17.9 g.

More on stoichiometric calculations can be found here: https://brainly.com/question/27287858

#SPJ1

The sequence of amino acids was controlled by the information in the BLANK molecules. (Fill in the blank)

Answers

The sequence of amino acids in a protein is controlled by the information stored in the DNA molecules.

DNA (deoxyribonucleic acid) is the genetic material that contains the instructions for the development, growth, and function of all living organisms. The DNA sequence is made up of four nucleotide bases, which are adenine (A), cytosine (C), guanine (G), and thymine (T). These nucleotide bases form a code that determines the sequence of amino acids in a protein.

The sequence of amino acids is important because it determines the shape and function of the protein. Proteins are essential macromolecules that perform a wide range of functions in living organisms, such as enzymes, hormones, and structural components.

The amino acid sequence is critical in determining the three-dimensional structure of a protein, which is essential for its function.

The process of converting the DNA code into a sequence of amino acids is called protein synthesis. Protein synthesis involves two main steps: transcription and translation. During transcription, the DNA sequence is copied into a molecule called RNA (ribonucleic acid).

The RNA molecule then carries the code to the ribosome, where the sequence of amino acids is assembled according to the code.

In summary, the sequence of amino acids in a protein is controlled by the information stored in the DNA molecules. This sequence is important because it determines the shape and function of the protein, which is essential for the proper functioning of living organisms.

To know more about amino acids, visit:

https://brainly.com/question/14583479#

#SPJ11

A 1500. 0 gram piece of wood with a specific heat capacity of 1. 8 g/JxC absorbs 67,500 Joules of heat. If the final temperature of the wood is 57C, what is the initial temperature of the wood? (2 sig figs)

Answers

If the final temperature of the wood is 57C, then the initial temperature of the wood would have been 32.00 ºC.

To solve the problem, we can use the formula,

Q = m * c * ΔT , amount of heat absorbed by the wood is Q, its mass is m, specific heat capacity is c, the change in temperature is ΔT.

We know that m = 1500.0 g, c = 1.8 J/gºC, Q = 67,500 J, and the final temperature T₂ = 57ºC. We need to find the initial temperature T₁.

First, we can calculate the change in temperature,

ΔT = T₂ - T₁

ΔT = 57ºC - T₁

Next, we can rearrange the formula to solve for T₁,

T₁ = T₂ - (Q / (m * c))

T₁ = 57ºC - (67,500 J / (1500.0 g * 1.8 J/gºC))

T₁ = 57ºC - 25ºC

T₁ = 32ºC

Therefore, the initial temperature of the wood was 32.00 ºC.

To know more about specific heat capacity, visit,

https://brainly.com/question/21406849

#SPJ4

Of the following compounds, which is the most ionic? A) SiCl4 B) BrCl C)PCl3 D) Cl2O E) CaCl

Answers

(C) PCI3 thats the answer

locate structures of cellulose and amylose. a. what is the same about the two structures? b. what is different? c. what stabilizes these structures?

Answers

Cellulose and amylose are both polysaccharides, which are long chains of monosaccharide units (glucose units) joined together by glycosidic linkages.

The structure of cellulose is a linear chain of beta-D-glucose units joined by beta-1,4 glycosidic linkages. The repeating unit in cellulose is cellobiose, which is made up of two glucose units joined by a beta-1,4 glycosidic linkage. Cellulose molecules are held together by hydrogen bonds between adjacent chains to form strong, rigid fibers.

The structure of amylose is a linear chain of alpha-D-glucose units joined by alpha-1,4 glycosidic linkages. Unlike cellulose, amylose is unbranched. Amylose forms a spiral or helical structure, with the glucose units arranged in a tight coil held together by hydrogen bonds between adjacent glucose units.

Both cellulose and amylose are made up of glucose units and are held together by glycosidic linkages. The main difference is the type of glycosidic linkage between the glucose units - cellulose has beta-1,4 glycosidic linkages, while amylose has alpha-1,4 glycosidic linkages. Another difference is the way in which the glucose units are arranged - cellulose forms straight, rigid chains, while amylose forms a coiled or helical structure.

The stability of the structures of cellulose and amylose is due to the hydrogen bonds between the glucose units. These hydrogen bonds are formed between the hydroxyl groups on adjacent glucose units, which allows for strong, stable interactions between the chains.

Visit here to learn more about Cellulose brainly.com/question/27963779

#SPJ11

A sealed 10. 0L flask at 400K contains equimolar amounts of ethane and propane in gaseous form

Answers

The partial pressure of ethane and propane in the flask are both 16.42 atm.

The given information tells us that the flask is sealed, which means that no gas can enter or leave the flask. It also tells us that the volume of the flask is 10.0L and the temperature is 400K. Finally, it tells us that there are equimolar amounts of ethane and propane in the flask.

From this information, we can assume that the total pressure inside the flask is the sum of the partial pressures of ethane and propane. This is because the ideal gas law tells us that PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the gas constant, and T is the temperature. Since the number of moles of each gas is the same, we can assume that their partial pressures are equal.

To find the partial pressures, we need to use the ideal gas law again. However, we need to know the total number of moles of gas in the flask. We can find this by using the fact that the amounts of ethane and propane are equimolar. Since the molar mass of ethane is 30 g/mol and the molar mass of propane is 44 g/mol, we know that the total mass of gas in the flask is 74 g. Dividing this by the sum of the molar masses (30+44=74 g/mol), we get the total number of moles, which is 1 mol.

Now we can use the ideal gas law to find the partial pressures. We'll use R = 0.08206 L·atm/(mol·K) as the gas constant. For ethane, we have:

PV = nRT
P_ethane * 10.0L = 0.5 mol * 0.08206 L·atm/(mol·K) * 400K
P_ethane = (0.5 mol * 0.08206 L·atm/(mol·K) * 400K) / 10.0L
P_ethane = 16.42 atm

For propane, we get the same result:

PV = nRT
P_propane * 10.0L = 0.5 mol * 0.08206 L·atm/(mol·K) * 400K
P_propane = (0.5 mol * 0.08206 L·atm/(mol·K) * 400K) / 10.0L
P_propane = 16.42 atm

Therefore, the partial pressure of ethane and propane in the flask are both 16.42 atm.

Know more about Partial Pressure here:

https://brainly.com/question/31214700

#SPJ11

How many moles of gas are in a room with a volume of 85. 0 L? A light bulb in the same room at the same temperature and pressure has a volume of 61. 0 L and a 9. 00 moles of gas

Answers

The number of moles in the room depends on the temperature.

Assuming that the temperature and volume in the room are the same as those outside, we can use the ideal gas law to calculate the number of moles of gas in the room.

Ideal gas law is given by:

PV = nRT

Number of moles:

n = PV/RT

Since the temperature and pressure are the same in both cases, we can write:

n(room) = (P × V(room)) / RT

n(bulb) = (P × V(bulb)) / RT

We are given that the bulb contains 9.00 moles of gas at the same temperature and pressure as the room. Therefore, we can use the number of moles in the bulb to find the pressure and temperature:

n(bulb) = (P × V(bulb)) / RT

9.00 mol = (P × 61.0 L) / (R × T)

Similarly, for the room, we can write:

n(room) = (P × V(room)) / RT

n(room) = (P × 85.0 L) / (R × T)

P = (n × RT) / V

P = (PV / RT) × RT / V

P = nRT / V

We can use the value of n from the bulb to find the pressure and temperature:

9.00 mol × R × T / 61.0 L = P

P = 3.17 atm

Now we can use this value of pressure to find the number of moles in the room:

n(room) = (P × V(room)) / RT

n(room) = (3.17 atm × 85.0 L) / (R × T)

n(room) = (3.17 atm × 85.0 L) / (0.08206 L atm/mol K × T)

n(room) = 129.3 L atm / (R × T)

Therefore, the number of moles in the room depends on the temperature.

Learn more about volume Visit: brainly.com/question/27710307

#SPJ4

What would be the observation on day 4 of the bread mould

Answers

On day 4, you would observe a significant growth of white, fuzzy mycelium. The mycelium is composed of thread-like structures called hyphae, which spread throughout the bread and extract nutrients from it.

The mycelium is the vegetative part of the mold and serves to anchor the fungus and absorb nutrients. You may also notice that the bread has become softer and more moist due to the absorption of water by the mycelium. Additionally, you may observe spore-producing structures, such as black or green spore heads, which indicate that the mold is beginning to reproduce. The growth of the mycelium and spores on day 4 indicates that the bread mold is thriving and will continue to spread and consume the bread.

To know more about nutrients, here

brainly.com/question/1268939

#SPJ1

Summarize what collision theory says about solution formation. What is important to


remember about particle size and movement?

Answers

The frequency and energy of collisions between reactant molecules have an impact on the rate of a chemical reaction, according to collision theory.

The reactant particles must collide with enough energy during solution formation to overcome the attraction forces holding them together and create a new product. Important elements in this process are particle size and motion.

More collisions are possible due to the larger surface area that smaller particle sizes offer. The probability that faster-moving particles may collide with another particle with enough energy to start a successful reaction is also increased.

To know more about collision theory, visit,

https://brainly.com/question/20628781

#SPJ4

How many grams is equivalent to 3.8 moles of kno3?
o 0.0376 grams kno3
0 26.61 grams kno3
o 384.23 grams kno3
o 232.23 grams kno3

Answers

384.23 grams KNO₃ is equivalent to 3.8 moles of KNO₃.

The molar mass of KNO₃ (potassium nitrate) can be calculated by adding the atomic masses of potassium (K), nitrogen (N), and three oxygen (O) atoms, which gives 101.1 g/mol.

To find the mass of 3.8 moles of KNO₃, we can use the following formula:

mass = moles x molar mass

Substituting the given values, we get:

mass = 3.8 mol x 101.1 g/molmass = 384.18 g

Therefore, 384.18 g of KNO₃ is equivalent to 3.8 moles of KNO₃.

However, the answer choices are given in grams, so we need to round off the answer to two decimal places, which gives 84.23 g KNO₃ (rounded to two decimal places) as the correct answer.

To learn more about moles, here

https://brainly.com/question/31597231

#SPJ4

Name the following compound: 100 POINTS



Propyl amine
Ethyl amine
Ethyl dihydrogen amine
Propyl dihydrogen amine

Answers

Answer:

C. Ethyl dihydrogen amine

How much energy is needed to change 475. 0 grams of liquid water at 40. 0°C to steam at 100. 0°C?

Answers

The total energy needed to convert the 475.0 grams of water at 40.0°C to steam at 100.0°C is 1,068,637.5 Joules.

The energy needed to change 475.0 grams of liquid water at 40.0°C to steam at 100.0°C is known as the latent heat of vaporization.

This amount of energy is required to overcome the forces that keep the molecules of water in a liquid state. In other words, it is the energy needed to break the bonds that keep the molecules of water in a liquid state.

To calculate the total energy needed, the latent heat of vaporization is multiplied by the mass of water. Therefore, the total energy needed to convert the 475.0 grams of water at 40.0°C to steam at 100.0°C is 1,068,637.5 Joules.

This energy needs to be supplied in the form of heat for the water to change from liquid to steam.

Know more about Latent heat of vaporization here

https://brainly.com/question/2598640#

#SPJ11

Other Questions
Where does she go to run?A. around her blockB. downtownC. to the police station and backD. to the mountainsWhat is the first business she see?A. The post office B. The toy store C. The ice cream shop D. The bookstore Me gusta tanto el pueblo donde vivo que todas las maanas cuando me levanto en lugar de correr al parque o a la montaa salgo a correr por el centro del pueblo en la misma avenida son todos mis lugares favoritos, la librera es uno de los la mayora de los viejos en el estado con muchos libros en su primera edicin mientras paso corriendo por la tienda de juguetes donde siempre tienen los juguetes ms nuevos, pero tambin las viejas conexiones al lado de la tienda de juguetes est la oficina de correos y luego el mercado en el mercado, siempre tienen verduras y frutas frescas y por la maana se huele cuando hace mucho calor termino en la heladera donde mi amiga Raquel siempre me da un ratito para disfrutar antes de volver a casa pasando por la panadera a desayunar pan fresco tambin Pas por la comisara a saludar a mis amigos que trabajan all. How do you calculate the concentration of obtained solution with 2 solutions having the same concentration but different volume?^50.0cm of 0.0250 mol/dm nitric acid was mixed with 40.0 cm of 0.0250 mol dm/ sulfuric acid. In January, 280 guests at a hotel chose to use the valet service to park their cars during their stay. At the same time, 120 guests chose to use a public parking garage for their cars during their stay. What percentage of the guests at this hotel used the valet service? which are true of the greenhouse effect? multiple select question. all energy from the sun is absorbed by atmospheric gases. some sunlight is absorbed and some is reflected by the atmosphere. some infrared energy is absorbed by gases such as carbon dioxide (co2), water vapor (h2o), and methane (ch4). it changes sunlight and transforms it into carbon dioxide. some light is absorbed by the land and oceans, which radiate infrared energy back into the atmosphere. PLEASE HELP ME 20 BRAINLEISTAbdul flips a weighted coin 64 times and gets 16 tails. Based on experimental probability, how many of the next 40 flips should Abdul expect to come up tails? the table shows the outputs for several inputs. use two methods to find the output for an imput of 200 imputs: 0 1 2 3 4outputs: 25 30 35 40 45 Whats the theme of the story push up by jenny torres sanchez Review the details about Frances Perkins's life before and afterthe fire. How did the fire change Perkins's life? Did this changesurprise you? Why or why not? There are 5 different green balls and 7 different red balls to be arranged in a row. how many ways can be arranged if all the green balls are separated Hamlet speaks of fate when he says, "If it be now, tis not to come. If / it be not to come, it will be now. If it be / not now, yet it will come - the readiness is all. " What is the best interpretation of these lines?A) If something is supposed to happen now it will. If its not supposed to happen, it wont. Whats important is to be ready. B) If something is supposed to happen now, it wont. If its not supposed to happen, it will. Be ready anyway. C) If the time is now, avoid it. If its not the time, do it anyway. Be ready anyway Which sentence uses quotation marks and commas correctly? Blogi Activity In this activity, you will create an age pyramid for a population of crabs in a certain bay, based on an age group. Draw the age pyramid for the given population. The age of maturity of the species of crab is 0. 5-1. 5 years. Based on the structure of the pyramid, express your view on the given population. Age Group in years) Population in thousands) < 0. 5 198 0. 51. 0 508 101. 5 221 1. 52. 0 86 2. 2. 5 70 BI x' X, Font Sizes I E I Characters used: 0 / 15000 State five ways by which the introduction of Islam affected the people in Sierra Leone A student is writing a realistic fiction narrative for language arts class. Read the draft of the narrative and complete the task that follows. An Important DecisionWith a few clicks on the school's website, I find what I am looking for - the dates for volleyball tryouts. Nothing makes me happier than that sport. Whether I am casually bumping the ball with friends in the backyard or spiking one into the opposition's court with laser accuracy, I feel completely alive. Even though the official tryouts are a few weeks away, I have been practicing relentlessly when the gymnasium is open to students. My excitement leads me to call my best friend Katelyn. As soon as I hear the line ringing, a thought occurs to me and makes my heart flutter. The first day of tryouts is the same date as Katelyn's dance recital! She is depending on my moral support. When Katelyn's chipper voice answers, a sudden paralysis takes over my mind and body. Eventually I mumble, "Hey Katelyn. . . Hang on a second. . Uh, let me call you back. "Continue the narrative by writing one to three paragraphs that help readers better understand the central conflict of the story What does Havel say about what communism did to the workers? What is the purpose of using third person omniscient point of view in this exposition The volume of the cylinder displayed is approximately 9. 4 cubic feet. What is the approximate volume for a cone with the same height and radius? Whats the answer Which graph represents a function Write a Narrative essay on My Favourite Summer vacation with My FamilyPls write fast,by following all essay writing rules Which situation requires a square root operation? calculating the height of a cube given its volume calculating the radius of a circle given its area calculating the height of a cylinder given the area of the base calcuWhich situation requires a square root operation? calculating the height of a cube given its volume calculating the radius of a circle given its area calculating the height of a cylinder given the area of the base calculating the diameter of a circle given its circumferencelating the diameter of a circle given its circumference