What happens to water when it freezes?

a) it expands.
b) it forms vapor
c) its density increases.
d) its composition changes

Answers

Answer 1

Answer:

it expands

Explanation:

Answer 2

Answer:

a) it expands.

Explanation:

Water is more dense when it is a liquid, and less dense as a solid. This is why ice floats above water.

Hence, Ice expands when it freezes.


Related Questions

Complete the curved arrow mechanism for the reaction of 4-methylpentanenitrile and lialh4, followed by the addition of acid to give the major product

Answers

The curved arrow mechanism for the reaction as described is as represented in the attached image.

Nitrile reduction by LiAlH4

Nitriles, upon reaction with LiAlH4 can be converted to 1° amines.

Opon occurrence of this reaction, the hydride nucleophile attacks the electrophilic carbon in the nitrile to form an imine anion. Once stabilized by a Lewis acid-base complexation the imine salt can accept a second hydride to form a dianion.

On this note, the nitrile reduction of 4-methyl pentanenitrile and lialh4, followed by the addition of acid to give the major product is as represented in the attached image.

Read more on nitrile reduction by LiAlH4;

https://brainly.com/question/9002449

HELP
Determine the empirical formula of a compound containing 48.38
grams of carbon, 6.74 grams of hydrogen, and 53.5 grams of oxygen.
In an experiment, the molar mass of the compound was determined to be 180.15 g/mol.
What is the molecular formula of the compound?
For both questions, show your work or explain how you determined the formulas by
giving specific values used in calculations.

Answers

Answer:

I recently answered this question. The response I submitted is included below. I beleive my answer should be correct.

Explanation:

Question 1:

C: 48.38g(1mol/12g) = 4.0317 

H: 8.12g(1mol/1.01g) = 8.12

O: 53.5g(1mol/16g) = 3.34375

Divide by the smallest amount (3.34375)

C = 4.0317/3.34375 = 1.206 = 1

H = 8.12/3.34375 = 2.42 = 2

O = 3.34375/3.34375 = 1

Empirical formula = CH2O

Question 2:

Molecular formula = n(empirical formula)

n = molar mass (compound)/molar mass (empirical)

Empirical formula: CH2O

Molar mass of CH2O = 12 + 2x1 + 16 = 30 g/mol

Molar mass of compound: 180.15 g/mol

[tex]n = \frac{180.15g/mol}{30g/mol} = 6[/tex]

Molecular formula = C6H12O6

my teacher hasnt graded yet, but i got the same answer as the guy above. i did my best to explain the process for y'all if you genuinely don't understand/know how to do it. THE PROCESS IS VERY LONG, but youll get it eventually if i didnt help lol GOODLUCK

and yes, the molecular formula is C6H12O6

C + 2H2
CH4
For the reaction shown here, predict how many moles of methane can be produced from 72 grams of carbon in the presence of excess hydrogen gas.
A) 1
B) 2
C) 4
D) 6

Answers

Answer:

D

Explanation:

12g of carbon produces....... 1 mole of methane

72g of carbon will produce..1÷12 × 72 = 6moles

4. How many atom are in
C3H5(NO3)3

Answers

Answer:

carbon = 3

hydrogen=5

nitrogen=3

Oxygen=9

What is the meaning of N, E, M, and S in periodic table Need ASAP!

Answers

Answer:

Molybdenum is M, Einsteinium is E, and N is Nitrogen. Lastly, S is sulfur.

If a reaction is second-order with respect to a particular reactant, when the concentration of that reactant is increased by a factor of 4, the reaction rate will _____

Answers

Answer:

A reaction is second order with respect to a reactant.

Rate =k[A]

2

(i) If the concentration of the reactant is doubled, the rate of reaction becomes 4 times .

(ii) If the concentration of the reactant is reduced to half, the rate of reaction becomes one fourth.

Explanation:

If a reaction is second-order with respect to a particular reactant, when the concentration of that reactant is increased by a factor of 4, the reaction rate will increased by factor 16.

How do we calculate the rate of second order reaction?

Rate of the second order reaction will depends on the concentrations of one second-order reactant or two first-order reactants as:
Rate(1) = k[A]²

If the concentration of reactant becomes 4 times the initial concentration then rate will be:

Rate = k[4A]²

Rate(2) = 16k[A]²

Rate(2) = 16Rate(1)

Hence rate will increased by 16 times.

To know more about second order reaction, visit the below link:
https://brainly.com/question/17217385

#SPJ4

What mass of glucose can be produced from photosynthesis reaction using 10.0 mols co2

Answers

Answer:

300.06 grams of glucose can be produced from a photosynthesis reaction that occurs using 10 moles of carbon dioxide.

Explanation:

i don’t really know how to do this and need help

Answers

Answer:

Explanation:

To round the number to 3 significant figures, look at the first 4 digits: 3545 which will round to 355. The number in 3 significant figures will be 3,550,000.

[tex]\\ \sf\Rrightarrow 3545530[/tex]

[tex]\\ \sf\Rrightarrow 354553[/tex]

[tex]\\ \sf\Rrightarrow 35455[/tex]

[tex]\\ \sf\Rrightarrow 3545[/tex]

[tex]\\ \sf\Rrightarrow 355[/tex]

List five factors that can affect levels of dissolved oxygen in water:

Answers

Answer:

Aquatic life

Elevation

Salinity

Temperature

Explanation:

Aquatic life- animals living in water use up dissolved oxygen.

Elevation- the amount of oxygen in elevation increases.

Salinity- Salty water holds less oxygen than fresh water.

Temperature- cold water holds more dissolved oxygen than warm water.

what is the difference between melting point and boiling point?​

Answers

The melting point is the temperature a substance must reach to go into its liquid phase (or solid) and a boiling point is the temperature a substance must reach to go into its gas phase (or liquid). For example, water must be 0ºC to melt or freeze and 100ºC to boil.

The melting point is a certain temperature a thing has to be at to melt or to turn into a liquid and the boiling point is the same thing its just with gas

5. Summarize: What do you think would happen to the convection currents in the atmospheres and
along the coastlines if the surface of the Earth warmed up? Do you think this could have any affect
on the convection in the mantle? Why or why not? Your answer should be at least 3 sentences in
length,

Answers

Answer:

Explanation:

Image result for Summarize: What do you think would happen to the convection currents in the atmospheres and along the coastlines of the surface of the Earth warmed up? Do you think this could have any affect on the convection in the mantle? Why or why not? Your answer should be at least 3 sentences in length,

As the magma cools and solidifies, the convection currents will stop and the Earth will become geologically dead.

Explain how sulfur forms its ion.

Answers

Explanation:

the sulfur ato is in group 6 of the periodic table. In order to become an ion the ato needs to gain 2 electrons so it has a full outer shell of electron and is stable. so the atom S goes to S2+ + 2e

A solution that has a high amount of hydrogen ions is called.

Answers

Answer:

a solution with high amount of hydrogen ions is called an acidic solution

When two heterozygous parents are crossed (Aa X Aa), what percent of the offspring will have a dominant phenotype?

Answers

75% dominant and 25% resistive

Br2(g) cl2(g)⇌2brcl(g) δh∘f for brcl(g) is 14. 6 kj/mol. Δs∘f for brcl(g) is 240. 0 j/mol

Answers

The Change in Gibb's free energy, ΔG for the reaction at 298K is; -56.92KJ.

Gibb's free energy of reactions

It follows from the Gibb's free energy formula as expressed in terms of Enthalpy and Entropy that;

ΔG = ΔH - TΔS

On this note, it follows that;

ΔG = 14.6 - (298× 0.24)

Hence, the Gibb's free energy for the reaction is;

ΔG = 14.6 - 71.52ΔG = -56.92KJ

Remarks: The question requires that we determine the Gibb's free energy for the reaction at 298K.

Read more on Gibb's free energy;

https://brainly.com/question/13765848

The Gibbs free energy for the reaction Br²(g) Cl²(g)⇌2BrCl(g) is -56.92 KJ.

What is Gibbs Free energy?

It's the total work done in a closed thermodynamic system.

By the formula of Gibbs free energy

[tex]\rm \Delta G = \Delta H - T \Delta S[/tex]

The H is 14.6 KJ/mol

The change in temperature is 0.24

Putting the values in the equation

[tex]\Delta G = 14.6 - (298 \times 0.24)\\\\ \Delta G = 14.6 - 71.52\\\\ \Delta G = -56.92KJ[/tex]

Thus, the Gibbs free energy for the reaction is -56.92 KJ

Learn more about Gibbs Free energy

https://brainly.com/question/13318988

#SPJ4

Answer these questions based on 234. 04360 as the atomic mass of thorium-234. The masses for the subatomic particles are given. Round the mass defect to the 5th decimal place. Mass of a proton: 1. 00728 amu mass of a neutron: 1. 00866 amu How many protons does Thorium have? How many neutrons does Thorium-234 have? Calculate the mass defect for the isotope thorium-234 = amu.

Answers

The mass defect for the isotope thorium-234 if given mass is 234.04360 amu is 1.85864 amu.

How do we calculate atomic mass?

Atomic mass (A) of any atom will be calculated as:

A = mass of protons + mass of neutrons

In the Thorium-234:

Number of protons = 90

Number of neutrons = 144

Mass of one proton = 1.00728 amu

Mass of one neutron = 1.00866 amu

Mass of thorium-234 = 90(1.00728) + 144(1.00866)

Mass of thorium-234 = 90.6552 + 145.24704 = 235.90224 amu

Given mass of thorium-234 = 234.04360 amu

Mass defect = 235.90224 - 234.04360 = 1.85864 amu

Hence required value is 1.85864 amu.

To know more about Atomic mass (A), visit the below link:

https://brainly.com/question/801533

How many grams of sodium hydroxide (NaOH) do you need to get rid of 3000 grams of CO2? Don't worry about sig figs for this question.

Answers

Answer:

It would require 80 g of NaOH .

Explanation:

Find δg o for the following reaction, using δh o f and s o values. H2(g) i2(s) → 2 hi(g)

Answers

The  standard change in free energy is -35.76 kJ/mol. Values of standard free energy are obtained from thermodynamic tables.

What is the standard change in free energy?

The standard change in free energy can  be obtained using the relation;

ΔG°= ΔH° - TΔS

When;

ΔH°f(HI) = 26.466 kJ/mol

ΔH°f(H2) = 0 kJ/mol

ΔH°f(I2) = 0 kJ/mol

ΔS°f(HI) = 221.63 J/K/mol

ΔS°f(H2) = 145.64 J/K/mol

ΔS°f(I2) = 0 J/K/mol

Hence;

ΔH°freaction = [ 2(26.466)] - 0

= 52.932 kJ/mol

ΔS°freaction = [2(221.63 ) ] - [145.64 + 0]

= 443.26 - 145.64 = 297.62 J/K/mol

ΔG°= 52.932 * 10^3 - [298 * 297.62 ]

ΔG°= -35.76 kJ/mol

The  standard change in free energy is -35.76 kJ/mol.

Learn more about change in free energy: https://brainly.com/question/14143095

The change in free energy for the given chemical reaction between hydrogen and iodine gas is -31.068 kJ/mol.

How do we calculate the free energy change?

Free energy change of any reaction will be calculated by using the below equation:

ΔG° = ΔH° - TΔS, where

ΔH° = change in enthalpy

T = absolute temperature = 298K

ΔS = change in entropy

Change in any quantity during the reaction will be find out by substracting the reactant values from product values.

Given chemical reaction is:

H₂(g) + I₂(g) → 2HI(g)

ΔH° = 2(26.466)] - 0 = 52.932 kJ/mol

ΔS = [2(206.6) ] - [131 + 0] = 413.2 - 131 = 282.2 J/K.mol = 0.282 kJ/K.mol

On putting values on above equation, we get

ΔG° = 52.932 - (298)(0.282) = -31.068 kJ/mol

Hence required free enrgy is -31.068 kJ/mol.

To know more about free energy change, visit the below link:

https://brainly.com/question/7600523

#SPJ4

Why water is known as the "universal solvent?"

A. Because of water's polarity, it is not able to dissolve or dissociate many particles.

B. Because water is a polar molecule, it is able to dissolve or dissociate many particles.

C. Because water is a nonpolar molecule, it is able to dissolve or dissociate many particles.

Answers

A. I not sure kinda. Hopefully it's correct

how many liters of water would it require to 36 grams of the substance?

Answers

3 liters

________________

It would required 3 liters of substance

Please help!!!!!!!!!!!!!!!!!!!!!!!!
Need help ASAP.

Answers

Based on the equation of the reaction and the limiting reactant of the reaction, molarities of the ions are determined from the amount in moles of excess reactants and soluble products formed.

What is the limiting reactant in the reaction?

The limiting reactant is he reavtant that is used up in the reaction after which the reaction stops.

The limiting reactant is obtained from the mole ratio of the reactants in the equation of the reaction.

Equation of reaction is given as follows:

3 AgNO3 (aq) + Na3P (aq) ----> Ag3P (s) + 3 NaNO3 (aq)

Molar mass of AgNO3 = 170 g/mol

Molar mass of Na3P = 100 g/mol

Molar mass of Ag3P = 355 g/mol

Molar mass of NaNO3 = 85 g/mol

Mass of AgNO3 reacting = 83.4 g

Moles of AgNO3 reacting = 83.4/170 = 0.49 moles

Mass of Na3P reacting = 62.9

Moles of Na3P reacting = 62.9/100 = 0.629 moles

Moles ratio of AgNO3 to Na3P = 3 : 1

Mole rational of AgNO3 and NaNO3 1 : 1

Based on the mole ratio;

AgNO3 is the limiting reactant while Na3P is in excessMoles of Na3P left over is 0.629 - (1/3 × 0.49) = 0.465 moles0.49 moles of NaNO3 are formed

At the end of the reaction, molarity of the ions are as follows:

Molarity of Na+ = {0.49 + (3 × 0.46)}/1.71

Molarity of Na+ = 1.094 M

Molarity of P^{3+} = 0.465/1.71

Molarity of P^{3+} = 0.272 M

Molarity of NO3^{-1} = 0.49/1.71

Molarity of NO3^{-1} = 0.286 M

Therefore, molarities of the ions are determined from the amount in moles of excess reactants and soluble products formed.

Learn more about limiting reactant at: https://brainly.com/question/14225536

Which correctly describes the which correctly describes the relationship between a hydrate, water, and an anhydrous compound?
Heating an anhydrous compound forms water and a hydrate.
O Adding water to an anhydrous compound forms a hydrate.
O Combining an anhydrous compound and a hydrate produces water.
O Removing a hydrate from an anhydrous compound produces water.

Answers

Answer:

adding water to an anhydrous compound forms a hydrate.

Explanation:

The statement which correctly describes the relationship between a hydrate, water, and an anhydrous compound is adding water to an anhydrous compound forms a hydrate. The correct option is A.

What are anhydrous compounds?

Anhydrous means without water, so the compounds that do not contain water are anhydrous compounds. Some examples are sodium sulfate, hydrogen fluoride, etc.

Hydrates are the compounds that contain water as the H2O molecules. These compounds lose their structure if water molecules are removed from the compound.

So, when water is added to the anhydrous molecules, it converts into hydrates. An example is sodium sulfate decahydrate.

Thus, the correct option is A. Adding water to an anhydrous compound forms a hydrate.

To learn more about anhydrous compounds, refer to the link:

https://brainly.com/question/2709403

#SPJ2

chinua reacts 37g of magnesium with 150g of sulfuric acid. what will be the total mass of the products of this reaction

Answers

the total mass is 187g. The total mass of the reactant is always equal to total mass of the products.

explanation:

as per the given details, the reactant involved in the reaction are 37g of magnesium and 150g of sulfuric acid . the total of the reactant is 187g.

Please help with this question

Answers

A , wetlands act as a sponge sort of for water and slowly releases the water

What is qualitative and quantitative?​

Answers

Answer:

Quantitative data refers to any information that can be quantified, counted or measured, and given a numerical value. Qualitative data is descriptive in nature, expressed in terms of language rather than numerical values

Explanation:

:)

What determines whether atoms will form chemical bonds.

Answers

Answer:

The electron arrangement of the outer energy level of an atom determines whether or not it will form chemical bonds.

Explanation:

What are the three major branches of natural science?

• Earth and space science, life science, physical science

•Earth and space science, physical science, chemistry

•Physical science, life science, chemistry

•Life science, chemistry, physics​​

Answers

Explanation:

The three major branches of natural science are1.Physical,the study of universe.2.Chemistry,the study of matter.3.Biology,the study of life and living or organisms.have a good day.I hope this answer can help you

Answer:

here:)

Explanation:

Natural Sciences is the core of the branches of science as studies the nature of our physical world and the universe. The three branches of Natural Sciences are:

Physics, the Study of Universe.

Chemistry, the Study of Matter.

Biology, the Study of Life and Living Organisms.

Determine the empirical formula of a compound containing 48. 38 grams of carbon, 6. 74 grams of hydrogen, and 53. 5 grams of oxygen.

In an experiment, the molar mass of the compound was determined to be 180. 15 g/mol. What is the molecular formula of the compound?

For both questions, show your work or explain how you determined the formulas by giving specific values used in calculations

Answers

Answer:

I recently answered this question. The response I submitted is included below. I beleive my answer should be correct.

Explanation:

Question 1:

C: 48.38g(1mol/12g) = 4.0317 

H: 8.12g(1mol/1.01g) = 8.12

O: 53.5g(1mol/16g) = 3.34375

Divide by the smallest amount (3.34375)

C = 4.0317/3.34375 = 1.206 = 1

H = 8.12/3.34375 = 2.42 = 2

O = 3.34375/3.34375 = 1

Empirical formula = CH2O

Question 2:

Molecular formula = n(empirical formula)

n = molar mass (compound)/molar mass (empirical)

Empirical formula: CH2O

Molar mass of CH2O = 12 + 2x1 + 16 = 30 g/mol

Molar mass of compound: 180.15 g/mol

[tex]n=\frac{180.15g/mol}{30g/mol}= 6[/tex]

Molecular formula = C6H12O6

what are 2 of the characteristics of temporary physical change

Answers

Answer:

Temporary in nature.

No new substance is formed.

Explanation:

Temporary in nature: Does not affect the internal structure of a substance, only the molecules are rearranged.

No new substance is formed: Most of the physical changes are reversible. We can obtain the substance back even after the change.

hope this helps

have an awesome day -TJ

Answer:

Doesnot affect the internal structure of the substance.no new substance is formed.temporary in nature...

In the kinetic molecular theory of gas behavior, the assumption is made that gas molecules:.

Answers

Answer:

In the kinetic molecular theory of gas behavior; the assumption is made that gas molecules move with a kinetic energy equal to their centigrade temperature_ move rapidly in random directions: are close together in their container which exerts pressure_ are attracted to each other by strong forces.

Explanation:

Other Questions
How does Sumner try to make Butler and his position on slavery seem ridiculous? PLEASE HELP!!! I WILL MARK BRAINLIEST!!!! TRUE OT FALSE!! The International Banking System is "Decentralized" meaning that there is not a coordinating bank with power over the entire international banking system and there is NOT a single set of rules that governs this. Question 1 options: True FalseQuestion 2 (2 points) Currency exchange is the trade of different kinds of money.Question 2 options: True False why language is an important of communication tools? Identificar. Complete the following statements by conjugating the verb tener in the blanks provided. fill in the blanks. 1. Mi padre ( )mucho xito. 2. T( ) prisa cada maana. 3. Yo no tengo un suter por eso( ) fro. 4. Ellos quieren un refresco porque( ) sed 5. Nosotros( ) mucha hambre. Vamos a comer! hi, please answer the question, show your work PLS HELP :How is energy causing motion or creating a change in this image? (2 points)(leaves of a plant in the sunlight)1.Energy from fuel allows the plant to grow and make its own food.2.Energy from the sun allows the plant to grow and make its own food.3.Energy from the wind allows the plant to grow and make its own food.4.Energy from the water allows the plant to grow and make its own food 2. Describe asteroids and their orbits in the solar system. The __________ requires that healthcare providers refrain from acts of omissions that would foreseeably result in harm to others, especially in cases in which the individuals are particularly vulnerable to the risk. what do we learn about Esperanza through the chapters chanclas,hips,the first job. for house on mango street Find the area of the figure two red triangles This is a semi-question that I know the answer too. Do yall know what pepperoni rolls are if so please leave your state. I already halfway did this but I still feel like imma get some answers wrong so can someone help me (also this is not history this is Science but brainly don't have a Science subject) A quarter is tossed three times. What is the probability that it will landon tails three times in a row? 2. The center of a circle is at (4,-5). The radius of the circle is 10 units. Write the equation of thecircle. 11. Which statement BEST represents the messageBenjamin Franklin was trying to send with thispolitical cartoon?JOIN, or D I E.A.The colonies will be more effective if theyconvince American Indians to join the waragainst France.B.The colonies will be more effective as a singleunit, and they should join together. The colonies are separate units, and theyshould join with Great Britain to succeed.D.The colonies will be more effective if they joinwith France in the war against Great Britain. Centuries ago, countries sponsored explorers to set sail for parts unknown and return with tales of new lands. These explorations led the Europeans to discover North America. The ocean journey from England, France, or Spain to North America was 3,000 miles of unknown dangers, but it led to discoveries. Explorers made these treacherous voyages for three main reasons: religion, wealth, and competition. These voyages of discovery began in the eleventh century.Historical records indicate that Leif Eriksson, a Viking explorer, was the first man to reach North America around 1000. Leif is credited with landing along the coastline of present-day Newfoundland. A Viking settlement was established and occupied for several years before Eriksson left to return to his homeland. He died around 1020.Much later, Christopher Columbus left his homeland in 1492 to seek wealth in the form of trade items. The Italian explorer was destined for China but erred in direction and arrived on Watling's Island in the Bahamas. It was a long and dangerous journey. Upon arrival, Columbus dedicated the newly discovered land to the Spanish King and Queen of Aragon. Then, Columbus made three more voyages to North America in 1493, 1498, and 1502. To the very end, Christopher Columbus was adamant that he discovered a trade route to China. He denied ever being to North America.Credited with sailing around the southern tip of Florida, Spanish explorer Juan Ponce de Leon had several adventures in the New World. His journey around Florida occurred in 1513. At the time, he thought Florida was an island. When he returned to Florida in 1521, he was wounded by a poisoned arrow, which ultimately ended his life.Afterward, Hernando De Soto, a Spanish adventurer, left to explore present-day Florida in 1538. He and his men traveled thousands of miles through the South. They were the first Europeans recorded to have crossed the Mississippi River in 1541..What is the overall structure of this text? Cause and effect Chronological order Compare and contrast Problem and solution. Bernice spent her summer studying the volcanoes of Western Europe. She decided to finish her research on the island of Sicily. Which volcano will Bernice be studying to complete her research?A. Mt. Saint Helens B. Mt. Vesuvius C. Mt. Vernon D. Mt. EtnaPlease select the best answer from the choices provided A B C D which of these events lead European countries to seek natural resources in colonies around the world during the 29th century? A 10-newton object moves to the left at 1 m/s. Its kinetic energy is approximately ____ joules What is the general term for viruses and bacteria that make us sick?.