Answer:
0.44L
Explanation:
Given parameters:
Initial volume = 0.75L
Initial temperature = 25°C = 273 + 25 = 298K
Final temperature = -100°C = 273 + (-100) = 173K
Unknown:
New volume of the balloon = ?
Solution:
According to Charles's law;
"the volume of a fixed mass of a gas varies directly as its absolute temperature if the pressure is constant".
Mathematically;
[tex]\frac{V_{1} }{T_{1} }[/tex] = [tex]\frac{V_{2} }{T_{2} }[/tex]
V and T are temperature values
1 and 2 are the initial and final states
Insert the parameters and solve;
[tex]\frac{0.75}{298}[/tex] = [tex]\frac{V_{2} }{173}[/tex]
298V₂ = 129.75
V₂ = 0.44L
5. What is the pH of an aqueous solution of the strong acid, Perchloric Acid (HClO4), with a concentration of 0.007 M?
the layering of rock horizontally is for the __________ only.
A. relative age
B. same age
C. absolute age
Answer:
A
Explanation:
True or False: All temperatures used in the comparisons or calculations of gases must use the Kelvin temperature scale.
Answer:
True
Explanation:
I used my notes from class today. I could be wrong.
HELPPP !!
Walk-in refrigerator or freezer units
must include an inside safety release
O must be air-tight within 98.5% tolerance
O must have an interior ceiling no less than 6'4" in height
O all of the above
Answer:
all of the above
Explanation:
What is different at the molecular level between a solid and a liquid? (multiple can be correct)
a. The type of molecule
b. Strength of intermolecular forces
c. Speed of particles
d. Nothing
Answer:
B. Strength of intermolecular forces
The different at the molecular level between a solid and a liquid is the strength of intermolecular forces. Therefore, option B is correct.
What are intermolecular forces ?The term intermolecular forces are defined as the attractive and repulsive forces that form between the molecules of a substance. Intermolecular forces are responsible for most of the physical and chemical characteristics of matter.
The intermolecular forces play a crucial role in determining the physical characteristics of molecules, including their melting and boiling points, density, and enthalpies of fusion and vaporization.
Highly electronegative atoms produce hydrogen bonding. They are the greatest intermolecular force and only exist between hydrogen and oxygen, fluorine, or nitrogen.
Thus, the different at the molecular level between a solid and a liquid is the strength of intermolecular forces, option B is correct.
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Name the EXOTHERMIC phase changing process in the diagram below:
Answer:
it's most likely liquid to gas, solid to gas, and solid to liquid
Explanation:
HELP !!!!
The area where pests hide is called:
a hot zone
a hamlet
a homeland
a harborage
Answer:
a harborage!
Explanation:
1. If a solution of sodium chloride has 22.3 g of
NaCl, and a volume of 2.00 L, what is its molarity?
We are given:
Mass of NaCl in the given solution = 22.3 grams
Volume of the given solution = 2 L
Number of Moles of NaCl:
We know that the number of moles = Given mass / Molar mass
Number of moles = 22.3 / 58.44 = 0.382 moles
Molarity of NaCl in the Given solution:
We know that Molarity of a solution = Moles of Solute / Volume of Solution(in L)
Molarity = 0.382 / 2
Molarity = 0.191 M
A 500 mL sample of gas at 960 kpa is compressed to 100 mL. What is the new pressure of the gas?
Please I really need help.
Answer:
The answer is 4800 kPaExplanation:
The new pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
From the question we have
[tex]P_2 = \frac{500 \times 960000}{100} = \frac{480000000}{100} \\ = 4800000[/tex]
We have the final answer as
4800 kPaHope this helps you
What is an Atomic Model
Answer:
the structure of an atom, theoretically consisting of a positively charged nucleus surrounded and neutralized by negatively charged electrons revolving in orbits at varying distances from the nucleus, the constitution of the nucleus and the arrangement of the electrons differing with various chemical elements.
Explanation:
Rank the following chemical species from largest ionic radius to smallest ionic radius
V^3+, V^5+, V^4+, V^2+
Answer:
Biggest Radii V²⁺ > V³⁺ > V⁴⁺ > V⁵⁺ Smallest Radii
General Formulas and Concepts:
Periodic Trends: Atomic/Ionic RadiiCoulomb's LawExplanation:
The Periodic Trend for Atomic Radii is down and to the left. Therefore, the element with the largest radius would be in the bottom left corner of the Periodic Table.
Anions will always have a bigger radii than the parent radii. When we add e⁻ to the element, we are increasing the e⁻/e⁻ repulsions. This will cause e⁻ to repel themselves more and thus create more space, increasing the radii size.
Cations will always have smaller radii than the parent radii. When we remove e⁻ from the element, we are decreasing e⁻/e⁻ repulsions. Since there are less e⁻, there is no need for more space and thus decreases the radii size.
Since Cations are smaller than the parent radii, the more e⁻ we remove, the smaller it will become.
Therefore, the least removed e⁻ Vanadium would be the largest and the most removed e⁻ Vanadium would be the smallest.
1. Sugar in a jar has a volume of 750 cubic centimeters and a mass of 690 grams.
Calculate its density. Write your answer to the hundredths place.
Answer:
The answer is 0.92 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{690}{750} = \frac{69}{75} = \frac{23}{25} \\ [/tex]
We have the final answer as
0.92 g/cm³Hope this helps you
How do you determine whether an acid should be broken up into ions in the
complete ionic equation?
Answer:
When chemicals in solution react, the proper way of writing the chemical formulas of the dissolved ionic compounds is in terms of the dissociated ions, not the complete ionic formula. A complete ionic equation is a chemical equation in which the dissolved ionic compounds are written as separated ions.
Which molecule is most polar?
A) CH3CHO
B)CO2
C)CH3Cl
D)C2H6
E)NONE
the answer is none
Explanation:
Water
Water is the most polar molecule because a bond between oxygen and hydrogen has the most difference out of the atoms listed. Although the oxygen has two hydrogens bonded, this does not decrease the electronegativity of oxygen, but oxygen unfairly shares sets of electrons from both hydrogens, making it more polar still
There are two types of molecule in chemistry, one is polar molecule and other is non polar molecule. Therefore, among all the given option none is polar molecule. The correct option is option D.
What is polar molecule?A polar molecule is a type of chemical compound where there is an uneven distribution of electrons among the covalently bound atoms. The term "polarity" refers to how unlike two molecules' electrical poles are from one another. If they are quite dissimilar, the species is said to be a highly polar molecule.
Dipole moment tells about the extent of polarity in a molecule. It is measured in units of Debye. It can be calculated by multiplying charge and the separation between these two charges. Among all the given option none is polar molecule.
Therefore, among all the given option none is polar molecule. The correct option is option D.
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BRAINLIEST + 20 POINTS
What will occur if two reactant molecules collide but do not have the right alignment?
Answer:
Contents Home Courses University of California Davis UCD Chem 2C: General Chemistry III UCD Chem 2C: Larsen Text Unit 4: Chemical Kinetics Expand/collapse global location
4.7: Collision Theory
Last updatedSep 3, 2020
4.6: Using Graphs to Determine (Integrated) Rate Laws
4.8: Temperature and Rate
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Learning Objectives
Molecules must collide in order to react.
In order to effectively initiate a reaction, collisions must be sufficiently energetic (kinetic energy) to break chemical bonds; this energy is known as the activation energy.
As the temperature rises, molecules move faster and collide more vigorously, greatly increasing the likelihood of bond breakage upon collision.
Collision theory explains why different reactions occur at different rates, and suggests ways to change the rate of a reaction. Collision theory states that for a chemical reaction to occur, the reacting particles must collide with one another. The rate of the reaction depends on the frequency of collisions. The theory also tells us that reacting particles often collide without reacting. For collisions to be successful, reacting particles must (1) collide with (2) sufficient energy, and (3) with the proper orientation.
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Answer:
It cannot collide as all molecules don't touch each other but if it does i don't know sorry
Explanation:
How many milliliters of 2.00 M H2SO4 will react with 28.0 g of NaOH?
Taking into account the reaction stoichiometry and the definition of molarity, 175 mL of 2 M H₂SO₄ will react with 28.0 g of NaOH.
Reaction stoichiometryIn first place, the balanced reaction is:
H₂SO₄ + 2 NaOH → Na₂SO₄ + 2 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
H₂SO₄: 1 moleNaOH: 2 moles Na₂SO₄: 1 moleH₂O: 2 molesThe molar mass of the compounds is:
H₂SO₄: 98 g/moleNaOH: 40 g/moleNa₂SO₄: 142 g/moleH₂O: 18 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
H₂SO₄: 1 mole× 98 g/mole= 98 gramsNaOH: 2 moles× 40 g/mole= 80 gramsNa₂SO₄: 1 mole× 142 g/mole= 142 gramsH₂O: 2 moles× 18 g/mole= 36 gramsDefinition of molarityMolar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
[tex]Molarity= \frac{number of moles}{volume}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].
Moles of H₂SO₄ requiredThe following rule of three can be applied: If by reaction stoichiometry 80 grams of NaOH react with 1 mole of H₂SO₄, 28 grams of NaOH react with how many moles of H₂SO₄?
[tex]moles of H_{2}S O_{4} =\frac{28 grams of NaOHx1 mole ofH_{2}S O_{4} }{80 grams of NaOH}[/tex]
moles of H₂SO₄= 0.35 moles
Volume of H₂SO₄ requiredIn this case, you know:
Molarity= 2 M= 2 [tex]\frac{moles}{liter}[/tex]amount of moles= 0.35 molesReplacing in the definition of molarity:
[tex]2 \frac{moles}{liter}= \frac{0.35 moles}{volume}[/tex]
Solving:
2 [tex]\frac{moles}{liter}[/tex] × volume= 0.35 moles
volume= 0.35 moles ÷ 2 [tex]\frac{moles}{liter}[/tex]
volume= 0.175 liters= 175 mL (being 1 L= 1000 mL)
Finally, 175 mL of 2 M H₂SO₄ will react with 28.0 g of NaOH.
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PLSS HELPS ME!!!!!!
Upwellings are the result of
A. the Coriolis effect.
B. gyres in the open ocean.
C. changes in the shape of coastlines.
D. wind and vertical movement of surface waters.
Answer:
it must be the answer C.
hope you have a nice day
hope it will help you
I need it now pleasee help
Answer:
Their energes can have any values
Explanation:
Ill give you guys brainly and 50 points please answer im struggling
Answer:
check the image
Explanation:
what is a ignous rocks
Answer:
Igneous rock, or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.
- Wikipedia
Answer: Igneous rocks are rocks that form when hot molten lava/rock cools and crystallizes.
Explanation:
8. Which object has molecules that are moving? water in a cup that is not moving, or water in the ocean
PLEASE HELP ASAP!!!
Answer:
Water in the ocean
Explanation:
The water in the ocean is always moving so all the molecules are was well
How does the number of atoms or molecules in a system affect its thermal energy?
A. A system with fewer atoms and molecules has more thermal energy.
B. A system with more atoms and molecules has more thermal energy.
C. The number of atoms or molecules does not affect the thermal energy of a system.
D. Thermal energy increases as the atoms and molecules in a system move more.
Answer:
D. Thermal energy increases as the atoms and molecules in a system move more.
Explanation:
Thermal energy is a form of kinetic energy possessed by molecules of a system. The measure of this kinetic energy in an atom is called heat.
The average kinetic energy of a system is the temperature.
According to the kinetic theory, the more the particles move, the more their thermal energy. Thermal energy is often predicated on the velocity of the particles of the medium.Plsss help I will be giving branliest to most helpful answer
1. The molarity of a solution of 6.0 g of KCl in 80. mL of solution is ________
Answer:
1.0 M of KCl
Explanation:
First off, we're given 6.0 g of KCl. From here, we just find the molar mass of KCl by adding the molar masses of each element in the compound. The molar mass for the potassium is 39 g/mol, and the chlorine is 34 g/mol (all found on periodic table). We add those to find the compounds molar mass, which turns out to be 73 grams/ mole.
From here, we need to convert grams to moles so we multiply the grams by the molar mass so that we cancel out grams and only leave behind moles ( 6.0 grams x 1 mole/73 grams ≈ 0.08 moles).
From here, we need to find the amount of liters in the solution, considering that the Molarity (M) is the same equation as mol/ Liter. To find this, we must convert similar units so that they work, in this case, we must convert milliliters to liters. We know that 1000 milliliters are equal to 1 liter, therefore like what we did with the molar mass and grams, we must cancel out milliliter so we only have liters ( 80 mL x 1 L / 1000 mL= 0.08 L)
From here, we divide the moles by the liters in order to make the molarity. The reason why is because as said before, M is equal to mol/L
(0.08 moles / 0.08 L = 1.0 M)
I hope this helped you and good luck with your semester in Chemistry!
Explain why HCl can be a strong electrolyte, but a dilute HCl solution can be a poor conductor?
Answer:
Because as the concentration is diminished, the capacity to transfer electricity is diminished as well.
Explanation:
Hello!
In this case, since electrolytes are substances that are able to conduct the electricity in aqueous media (solutions in which water is the the solvent) because they have the capacity to form ions with both positive and negative charges, due to the fact that HCl is a strong acid, we notice it is fully ionized in solution and therefore it is a strong electrolyte. However, when the concentration is diminished, we can notice that strength is diminished as well because less ions will have the capacity to transfer the electricity and therefore it'd become a poor conductor or weak electrolyte.
Best regards!
10 POINTS PLS HELP
Combustion occurs when _____.
oxidation reactions are very slow
oxidation reactions are so fast the substance catches fire
oxygen is removed from another substance
machines use chemical energy to do work
Answer: oxidation reactions are so fast the substance catches fire
Explanation:
Answer:
When oxidation reactions are so fast the substance catches fire
Explanation:
because i am big bwain
Calculate the molarity of 4.07 x 10^2 mL of solution containing 19.4 g of potassium iodide.
Answer: 0.287 M
Explanation:
Molarity is [tex]M=\frac{n}{v}[/tex]. n is moles or solute and v is volume of solution in liters. Since we are given the grams of potassium iodide, we want to convert that into moles. With the volume in mL, we want to convert that to liters.
[tex]19.4 g*\frac{1 mol}{166.0028g} =0.1169 mol[/tex]
[tex]4.07*10^2mL*\frac{1L}{1000mL} =0.407 L[/tex]
Now that we have moles and liters, we can find molarity.
[tex]M=\frac{0.1169mol}{0.407L} =0.287 M[/tex]
Now, we know the molarity is 0.287 M.
Aluminum hydroxide reacts with sulfuric acid as follows: 2Al(OH)3+3H2SO4âAl2(SO4)3+6H2O.Which reagent is the limiting reactant when 0.550 mol Al(OH)3 and 0.550 mol H2SO4 are allowed to react?How many moles of Al2(SO4)3 can form under these conditions?
How many moles of the excess reactant remain after the completion of the reaction?
Answer:
Explanation:
2Al(OH)₃ + 3H₂SO₄ = Al₂(SO₄)₃ + 6H₂O
2 moles 3 moles
2 moles of Al(OH)₃ reacts with 3 moles of H₂SO₄
.55 moles of Al(OH)₃ reacts with .55 x 1.5 moles of H₂SO₄
moles of H₂SO₄ required = .825 moles
moles available = .55 moles , so H₂SO₄ is the limiting reagent .
3 moles of H₂SO₄ yields 1 moles of Al₂(SO₄)₃
.55 moles of H₂SO₄ yields 1 x .55 / 3 moles of Al₂(SO₄)₃
Al₂(SO₄)₃ produced = 1 x .55 / 3 moles = .1833 moles .
Al(OH)₃ reacted = 2 x .55 / 3 = .367 moles
excess Al(OH)₃ remaining = .5 - .367
= .133 moles .
WHAT TYPE OF REACTION IS HAPPENING WITH NI2O3 (s) Ni (s) + O2 (g)
Answer:
Decomposition.
Explanation:
Hello!
In this case, since we can find four types of reactions, combination, decomposition, single displacement and double displacement, for the reaction:
2NI2O3 (s) --> 4Ni (s) + 3O2 (g)
We can evidence that the reactant (only one) is separated into the elements forming it; therefore, we infer this is a decomposition reaction.
Best regards!
Why is fusion not a practical source of energy?
Answer:
Light i think
Explanation:
light is a source of energy also
