Answer:
No, you can not calculate the solubility of X in water at 17 0C.
Explanation:
Solubility refers to the amount of a substance that dissolves in 1000 L of water.
To calculate the solubility of a solute in water, all the water is evaporated and the solid is carefully collected, washed, dried and weighed. The mass of solid obtained can now be used to calculate the solubility of the solute in water as long as there was no loss in mass of solid during the experiment.
In this case, the student threw away part of the solid that precipitated. As a result of this, the mass of solid obtained at the end of the experiment is not exactly the total mass of solute that dissolved in the solvent. Hence, the solubility of X in water at 17 0C can not be accurately calculated.
when you hear organic what does it mean?
Answer:
The word “organic” refers to how a food is grown. ... However, without preservatives and fewer chemicals than regular produce, you might notice that organic foods taste fresher.
Answer:
The phrase hear, hear seems to have come into existence as an abbreviation of the phrase hear him, hear him, which was well-established in Parliament in the late seventeenth century. ... When you say hear, hear, you are in fact saying that you agree with something another person has just said.
Explanation:
hope it's help you
A multi-nutrient fertilizer contains several different nitrogen containing compounds. The fertilizer is 53.2% CH4N2O (urea), 24.1% KNO3 , and 11.8% (NH4)2HPO4 by mass. The remainder of the fertilizer consists of substances that do not contain nitrogen. How much fertilizer should someone apply to provide 2.20g N to a plant?
Answer:
7.19g of fertilizer are required to provide 2.20g of N to a plant
Explanation:
In 100g of fertilizer, the amount of nitrogen could be obtained as follows using the ratio of molar mass of nitrogen*atoms of nitrongen / molar mass of the molecule:
CH4N2O = 53.2g * (14g/mol*2 / 60.06g/mol) = 24.8gN
KNO3 = 24.1g * (14g/mol*1 / 101.10g/mol) = 3.3g N
(NH4)2HPO4 = 11.8g * (14g/mol*2 / 132.06g/mol) = 2.5g N
The mass of nitrogen in 100g of fertilizer is 24.8g + 3.3g + 2.5g = 30.6g N
That is: 30.6g N / 100g of fertilizer.
To obtain 2.20g of nitrogen are required:
2.20g N * (100g Fertilizer / 30.6g N) =
7.19g of fertilizer are required to provide 2.20g of N to a plantClassify each of the following as an example of a mandatory, discretionary, or originator controlled policy, or a combination thereof. Justify your answers.
a. The file access control mechanisms of the UNIX operating system
b. A system in which no memorandum can be distributed without the author's consent
c. A military facility in which only generals can enter a particular room
d. A university registrar's office, in which a faculty member can see the grades of a particular student provided that the student has given written permission for the faculty member to see them.
Answer:
Classifications according to mandatory, discretionary, or originator controlled policy, or a combination thereof:
a. Mandatory
b. Originator
c. Discretionary
d. Mandatory and Originator combined
Explanation:
a) Mandatory control means that access to the UNIX operating system is restricted.
b) Originator controlled policy implies that the memorandum cannot be distributed without the author's consent or permission.
c) Discretionary means that only certain authorized users, for example, generals, can access the particular room.
d) Combined Mandatory and Originator means that while access is restricted to some people, the originator's consent is still required before access can be granted to the faculty member.
I need help plz quick on my homework its due at 11 i will give branliest to correct answer its on limiting reagents.
Answer:4.2 6.4 6.7 9.5 5.5 3.8
Explanation:
Consider the following chemical equilibrium:
2H2(g) + O2 ⇌ 2H2O(l)
Now write an equation below that shows how to calculate Kc from Kp for this reaction at an absolute temperature . You can assume is comfortably above room temperature.
Answer:
hmm i dont know but i can try mate!
Explain why the phosphorolytic cleavage of glycogen is more energetically advantageous than its hydrolytic cleavage.
Answer:
See explanation
Explanation:
Basically, phosphorolysis involves the cleavage of a bond by adding phosphoric acid across the bond, while hydrolysis involves the cleavage of a bond by adding water across the bond.
The phosphorolytic cleavage of glycogen is energetically advantageous because the released sugar is already phosphorylated. In contrast, a hydrolytic cleavage would yield glucose, which would then have to be phosphorylated at the expense of the hydrolysis of a molecule of ATP to enter the glycolytic pathway(Biochemistry, 5th ed, Jeremy M Berg et al, 2002).
A chemistry student is given 700. mL of a clear aqueous solution at 26.° C. He is told an unknown amount of a certain compound X is dissolved in the solution. The student allows the solution to cool to 26.° C. The solution remains clear. He then evaporates all of the water under vacuum. A precipitate remains. The student washes, dries and weighs the precipitate. It weighs 0.032 kg.
Required:
Using only the information above, can you calculate the solubility of X in water at 22.0°C ? If you said yes, calculate it. Be sure your answer has a unit symbol and 2 significant digits.
Answer:
The correct answer is - yes, 4.57 g of solute per 100 ml of solution
Explanation:
The correct answer is yes we can calculate the solubility of X in the water at 22.0°C. The salt will remain after the evaporate from the dissolved and cooled down at 26°C.
Then, the amount of solute dissolved in the 700 ml solution at 26°C is the weighed precipitate: 0.032 kg = 32 g.
Then solublity will be :
32. g solute / 700 ml solution = y / 100 ml solution
⇒ y = 32. g solute × 100 ml solution / 700 ml solution = 4.57 g.
Thus, the answer is 4.57 g of solute per 100 ml of solution.
escape room ocean and air currents. Escape room
Answer:
1683
Explanation:
i did that game a few weeks ago preeeettyyyyyyyy sure that's the right number
Complete the following reaction: Li + S -->
Answer:
Li2S
Explanation:
Hope this helps.
Answer:
can u do an real answer pls so i can help u thanks
What do atoms make up
By definition, a(n) _______acid is any species that can donate a proton. Ammonia has a proton bonded to nitrogen, so ammonia can be an base (although a very weak one). A(n)___________ base is a proton acceptor, that is, it must have a pair of electrons to share with a proton. In theory, any atom with an unshared electron pair can be a________ pair so ammonia is a_______ proton; instead, it acts as a base and pulls a proton from water to a small extent. base The nitrogen in ammonia has an unshared electron In water, ammonia is too weak an ______-to give up its
Answer:
A Brønsted-Lowry acid.
A Brønsted-Lowry base.
Ammonia is an acceptor of proton.
Explanation:
A Brønsted-Lowry acid is any atom that can donate a proton (H +) to another atom or molecule whereas Brønsted-Lowry base is any species that can accept a proton from another atom or molecule or in other words, a Brønsted-Lowry acid is a proton donor, while on the other hand, a Brønsted-Lowry base is a proton acceptor. The ammonia molecule accepts the hydrogen ion is considered as the Brønsted-Lowry base.
how many electrons does chlorine need to gain to become an ion? will it become positively charged cation or negatively charged anion?
Explain why fluorine and chlorine are in the same group of the periodic table.
Give the electronic structures of fluorine and chlorine in your explanation.
Answer:
They both have 7 electrons in their outer shell
What are a few ways diseases spread?
Answer:Through Direct or indirect contact with an infected person or animal, through air or contaminated food and water.
Explanation:
During electrophilic aromatic substitution, a resonance-stabilized cation intermediate is formed. Groups, already present on the benzene ring, that direct ortho/para further stabilize this intermediate by participating in the resonance delocalization of the positive charge. Assume that the following group is present on a benzene ring at position 1 and that you are brominating the ring at positon 4. In the box below draw the structure of the resonance contributor that shows this group actively participating in the charge delocalization. -OCH3 • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • Do not include lone pairs in your answer. They will not be considered in the grading.
Answer:
See explanation
Explanation:
In electrophillic aromatic substitution, an electrophile attacks the aromatic ring and resonance structures are created.
We know that the nature of the substituents already present in the ring determines the position to which the incoming substituent is directed.
-OCH3 is an ortho-para director. If the -OCH3 is present at position 1 and the ring is brominated at position 4, the resonance structures shown in the image attached are observed.
how many grams of na2co3 would be needed to produce 1000g of nahco3
Answer:
630.95 grams of Na₂CO₃ would be needed to produce 1000g of NaHCO₃
Explanation:
The balanced reaction is:
Na₂CO₃ + CO₂+ H₂O → 2 NaHCO₃
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:
Na₂CO₃: 1 moles CO₂: 1 moleH₂O: 1 mole NaHCO₃: 2 molesBeing the molar mass:
Na₂CO₃: 106 g/moleCO₂: 44 g/moleH₂O: 18 g/moleNaHCO₃: 84 g/moleThen by stoichiometry the following quantities of mass participate in the reaction:
Na₂CO₃: 1 mole* 106 g/mole= 106 gCO₂: 1 mole* 44 g/mole= 44 gH₂O: 1 mole* 18 g/mole= 18 gNaHCO₃: 2 moles* 84 g/mole= 168 gYou can apply the following rule of three: if 106 grams of Na₂CO₃ are needed to produce 168 grams of NaHCO₃, how much mass of Na₂CO₃ is necessary to produce 1000 grams of NaHCO₃?
[tex]mass of Na_{2} CO_{3}=\frac{1000grams ofNaHCO_{3} *106gramsofNa_{2} CO_{3} }{168grams ofNaHCO_{3}}[/tex]
mass of Na₂CO₃= 630.95 grams
630.95 grams of Na₂CO₃ would be needed to produce 1000g of NaHCO₃
Which is mainly responsible for preventing erosion?
A) Mining
B) Farming
c) Rooting of Plants
D) Logging
Answer:
B. Farming
Explanation:
Ethical Behavior Worksheet Situation 1. You are taking a very difficult chemistry course, which you must pass to maintain your scholarship and to avoid damaging your application for graduate school. Chemistry is not your strong suit, and, because of a just-below-failing average in the course, you will have to receive a grade of 90 or better on the final exam, which is two days away. A janitor, who is aware of your plight, informs you that he found the master for the chemistry final in a trash barrel and has saved it. He will make it available to you for a price, which is high but which you could afford. What would you do?
Answer:
I would not accept it.
Explanation:
Although it is tempting to accept the janitor's offer and save the scholarship, which is not easy to get, I would not accept his offer, as I do not believe in victories based on dishonesty and would be heavy on conscience if I did the opposite. Obviously, I would not like to lose my scholarship and for that reason, I would look for other ways that would be honest and help me improve my grade. If I could not improve and lose the scholarship, I would be extremely sad, but I would be at peace with my conscience.
Number of atoms in 2.56 moles of He
1.54 × 10²⁴ atoms He
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
MolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 2.56 moles He
[Solve] atoms He
Step 2: Identify Conversion
Avogadro's Number
Step 3: Convert
[DA] Set up: [tex]\displaystyle 2.56 \ mol \ He(\frac{6.022 \cdot 10^{23} \ atoms \ He}{1 \ mol \ He})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 1.54163 \cdot 10^{24} \ atoms \ He[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
1.54163 × 10²⁴ atoms He ≈ 1.54 × 10²⁴ atoms He
The map shows the average high temperatures in July for two cities in Texas.
Average July High Temperatures
Texas
Del Rio
36°C
Galveston
32°C 12
Answer:
Highest temperature which was recorded in Texas was 40 degrees.
Explanation:
Texas has variating weather. In summer Texas city turns to be very hot and during winters the city of Texas experience fall in temperature. There is very few rainfall in Texas due the climatic conditions.
Radiation is different than the other types of heat transfer because
Explanation:
Heat transfer by radiation tends to be minimal in many everyday instances. This is in part, due to the 4th power exponentiation of the heat transfer equation that governs radiative heat transfer.
For instance, a bar of metal of 75 ºF will interact with your body, from a distance, when your body is at 98 ºF. But the temperature difference of 14 ºF will be so low, that it is difficult to feel or detect. However, if that bar was heated to 120º F and set close to you, you may begin to feel the heat from radiation. Then, if the bar was heated to the point that it began to glow red, several hundred degrees, not only would you feel it, but it may make you uncomfortably hot very quickly. If it was then heated to being white hot, you would almost certainly be burned by it, not by touching it, but simply by the radiative heat transfer. Again, its the 4th power exponent that really makes radiative heat transfer a powerful force when the temperature increases to a high level.
Another example from a text that I once used set an example of a person in a room with their body temperature at 98 ºF. In one case, the walls of the room surrounding the body are said to be 50º F, but in the other case, the walls are said to be 100º F. In both cases, the air in the room is said to be 75ºF. The question is asked: why is the person colder in the room with 50 ºF walls, when the air is the same temperature in both cases.
The answer is that the 100 ºF walls are acting to slightly warm the body, whereas the 50º F walls are actually taking heat away from the body by way of radiative heat transfer. You can do the equations to see exactly how much the different temperatures of the walls will effect this situation.
One final example - if you look into a thermos, you will see a highly reflective liner inside of the thermos. This is a radiant barrier, and it is put into the thermos to keep the liquid inside from losing heat by way of radiation. The reflective film will transfer back most of the heat that would otherwise be lost by radiating to the outer surface of the thermos, after which it would conduct through the side of the thermos. So a thermos provides a good example of a solution for heat transfer in the form of radiation.
Find the molarity of the following solution:
734 grams of lithium sulfate (Li2SO4) is dissolved to make 2.5 liters of solution.
Answer:
2.67 M
Explanation:
Molarity, which is the molar concentration of a substance, can be calculated using the formula;
M = n/V
Where;
M = molarity (M)
n = number of moles (mol)
V = volume (Litres)
Based on the provided information in this question, mass of lithium sulfate (Li2SO4) = 734g, volume = 2.5L
Using mole = mass/molar mass
Molar mass of Li2SO4 = 7(2) + 32 + 16(4)
= 14 + 32 + 64
= 110g/mol
Mole = 734/110
Mole (n) = 6.67moles
Molarity = n/V
Molarity = 6.67/2.5
Molarity = 2.668
Molarity of Li2SO4 in the solution is 2.67 M
Answer:
The molarity of the solution is 2.672[tex]\frac{moles}{liter}[/tex]
Explanation:
Molarity (M) is a way of expressing the concentration of solutions. It is defined as the number of moles of solute per volume of solution. The Molarity of a solution is determined by the following expression:
[tex]Molarity=\frac{number of moles}{volume}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].
Being the molar mass of Li₂SO₄ 109.94 g/mol, then you can apply the following rule of three: if 109.94 grams are present in 1 mole, 734 grams will be present in how many moles?
[tex]amount of moles=\frac{734 grams*1 mole}{109.94 grams}[/tex]
amount of moles= 6.68 moles
Then:
number of moles= 6.68 molesvolume= 2.5 LReplacing in the definition of molarity:
[tex]Molarity=\frac{6.68 moles}{2.5 L}[/tex]
and solving you get:
Molarity= 2.672[tex]\frac{moles}{liter}[/tex]
The molarity of the solution is 2.672[tex]\frac{moles}{liter}[/tex]
Are there any types of tissues that you think humans might have that are similar to plant’s vascular tissues? Help please
The types of tissues that you think humans might have that are similar to plant’s vascular tissues - is connective tissues of circulatory tissues.
A plant's vascular tissues transport nutrients throughout the plant, just as the circulatory system transports nutrients throughout the human body.
Vascular tissue is comprised of the xylem and the phloem, the main transport systems of plants.Xylem - transport of water and dissolved ions from the roots upwards through the plant.Phloem - transport of nutrients from leaves to other body parts.Connective tissue in the human :
is of four types mainly; blood, bones, cartilage, and connective tissue proper.Blood is the connective tissue that transports gases, nutrients.Blood also transports waste or toxic moleculesThus, the types of tissues that you think humans might have that are similar to plant’s vascular tissues - is connective tissues of circulatory tissues.
Learn more about the circulatory system:
https://brainly.com/question/22258254
Calculate the volume in liters of a 0.72 M aluminum sulfate solution that contains 75.0 g of aluminum sulfate Al2SO43.
Answer:
0.30 L
Explanation:
First we convert 75.0 g of Al₂(SO₄)₃ into moles, using its molar mass:
75.0 g ÷ 342.15 g/mol = 0.219 mol Al₂(SO₄)₃Then we can calculate the volume of the solution, by using the definition of molarity:
Molarity = moles of solute / liters of solution0.72 M = 0.219 mol / VolumeWe solve for Volume:
Volume = 0.30 LA gas sample is found to contain 39.10% carbon, 7.67% hydrogen, 26.11% oxygen, 16.82% phosphorus, and 10.30% fluorine. If the molecular mass is 184.1 g/mol, what is the molecular formula?
Answer:
C6H14O3F
Explanation:
The first step is to divide each compound by its molecular weight
Carbon
= 39.10/12
= 3.258
Hydrogen
= 7.67/1
= 7.67
Oxygen
= 26.11/16
= 1.63
Phosphorous
= 16.82/31
= 0.542
Flourine
= 10.30/19
= 0.542
The next step is to divide by the lowes value
3.258/0.542
= 6 mol of C
7.67/0.542
= 14 mol of H
1.63/0.542
= 3 mol of O
0.542/0.542
= 1 mol of P
0.542/0.542
= 1 mol of F
Hence the molecular formula is C6H14O3F
what amount of heat, in KJ, would be involved in condensing 12.9 g of ch3OH ?(hvap=38.0 kj/mol
Answer:
[tex]Q=-15.3kJ[/tex]
Explanation:
Hello!
In this case, since the enthalpy of vaporization is the contrary of the enthalpy of condensation, we have:
[tex]\Delta _{cond}H=-\Delta _{vap}H=-38.0kJ/mol[/tex]
Now, we convert the grams of CH3OH to moles:
[tex]n=12.9g*\frac{1mol}{32.05g}=0.402mol[/tex]
Thus, we compute the energy as shown below:
[tex]Q=n*\Delta _{cond}H=0.402mol*-38.0\frac{kJ}{mol}\\\\Q=-15.3kJ[/tex]
Which means 15.3 kJ of energy must be back down from the system.
Best regards!
Enthalpy is the measure of the energy that is not available to work. 15.27 kJ of energy is needed to condence 12.9 g of methenol.
Enthalpy:
It is the measure of the energy that is not available to work. It is denoted by [tex]\bold{ \Delta H}[/tex].
The energy of a system can be calculated by the formula,
[tex]\bold{Q = n \times \Delta H}[/tex]
Where,
Q - energy( in kJ)
n - Number of moles
[tex]\bold{ \Delta H}[/tex] - enthalpy
Given here,
[tex]\bold{CH_3OH = 12.9 g}[/tex]
[tex]\bold{\Delta Hvap = 38.1 kJ/mol}[/tex]
molar mass of the [tex]\bold{CH_3OH}[/tex] -
The number of moles of [tex]\bold{CH_3OH}[/tex]
[tex]\bold{n = \frac{w}{m}}\\\\\bold{n = \frac{12.9}{32.03}} \\\\\bold{n = 0.402}[/tex]
Put the values in the formula,
[tex]\bold{Q = 0.402\times 38.0}\\\\\bold{Q =15.27 }[/tex]
Therefore, the 15.27 kJ of energy is needed to condense 12.9 g of methenol.
To know more about Enthalpy, refer to the link:
https://brainly.com/question/9444545
Consider the following elementary reaction:
N2O(g) N2(g) O(g)
Suppose we let stand for the rate constant of this reaction, and stand for the rate constant of the reverse reaction. Write an expression that gives the equilibrium concentration of in terms of O and the equilibrium concentrations of N20 and N2.
Explanation:
The equation is given as;
N2O(g) ⇄ N2(g) + O(g)
k₁ = Forward reaction
k₋₁ = Reverse Reaction
Equilibrium concentration (K) = k₁ / k₋₁
[tex]K = \frac{[N2O] }{[N2] [ O]}[/tex]
Plz help it over science stuff
Suppose you perform a calorimeter experiment to determine the molar heat of neutralization of an unknown acid, H A HA, with sodium hydroxide, N a O H NaOH. You mix 37.2 mL of 0.50 M H A HA with 56.8 mL of 0.75 M N a O H NaOH and calculate the heat of reaction as -1.6 kJ. What is the molar heat of neutralization (in kJ/mol) for the unknown acid
Answer:
-86.02 kJ/ mole
Explanation:
The moles of the acid used = Molarity × Volume (L) =
= 0.50 (0.0372 L)
= 0.0186 moles
The heat released = -1.6 kJ
∴ 0.0186 moles neutralization of HA heat is: -1.6 kJ
The molar heat of neutralization due to one mole of the unknown acid = -1.6/0.0186
= -86.02 kJ/ mole
The molar heat of neutralization for the unknown acid is -86.02 kJ/ mole.
How to calculate Moles?The moles of the acid used = Molarity × Volume (L) =
= 0.50 (0.0372 L)
= 0.0186 moles
Thus, the moles of the acid used is 0.0186.
The heat released = -1.6 kJ
Thus, 0.0186 moles neutralization of HA heat is: -1.6 kJ
Molar heat of Neutralization: It is the amount of heat each mole of base added to the acid (or vice versa) causes the reaction to give off.
The molar heat of neutralization due to one mole of the unknown acid = [tex]\frac{-1.6}{0.0186}=-86.02kJ/mole[/tex]
So, the molar heat of neutralization is -86.02kJ/mole.
Find more information about Moles here:
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Calculate the number of oxygen atoms in a 80.0 g sample of scheelite (CaWo).
Be sure your answer has a unit symbol if necessary, and round it to 3 significant digits.
Answer:
Explanation:
scheelite is CaWO₄
Mol weight = 288
80 g of scheelite = 80 / 288 = 27.77 x 10⁻² moles
27.77 x 10⁻² moles of scheelite = 27.77 x 10⁻² x 6.02 x 10²³ molecules of scheelite
= 167.17 x 10²¹ molecules of scheelite
1 molecule of scheelite contains 4 atoms of oxygen
167.77 x 10²¹ molecules of scheelite contains 4 x 167.77 x 10²¹ atoms of oxygen .
= 671.08 x 10²¹ atoms of oxygen .
= 671 x 10²¹ atoms .
