how many moles of water in 100 grams

Answers

Answer 1

Answer:

There are approximately 5.55 moles

Explanation:


Related Questions

Gasoline has a density of 0.7197 grams per milliliter. Calculate the mass, in grams, of a sample of gasoline with a volume of 48.5 milliliters.​

Answers

Answer:

34.9103 or 34.9 g

Explanation:

Remember Density is a broken heart: m/v.

In this scenario (Let x = # of grams in the sample of gasoline),

D = 0.7198 g/mL = x g / 48.5 mL

So,

(0.7198 g/mL) * (48.5 mL) = x g

x g = 34.9103 = 34.9 g (Accounting for Significant Figures)

2. Transfer in energy to reach the highest amount of kinetic energy for both substance B and C.

3. Slowly transfer out energy from each substance. Note the temperature at which each substance changes phase.

​Substance B changed to a liquid at
ANSWER: °C.
Substance C changed to a liquid at
ANSWER: °C.
For Science please answer the questions with the word "ANSWER"

4. Based on your observations above, which substance needed a greater decrease in kinetic energy in order to change phase?
The substance with
(medium or low) ANSWER: Pick which one it is!
attraction needed more energy transferred out in order to change phase.

Answers

The change in phase of a substance is called a physical change. The substance C with low molecular attraction needs more energy transferred out and thus its kinetic energy have to be decreased to change from gas to liquid.

What is energy transfer?

Energy can neither be created nor be destroyed. However it can be transferred from one form to the other and thus total energy of a system is conserved.

In gaseous state molecules or atoms are far apart and have minimum intermolecular forces of attraction whereas in liquid state they have medium molecular attraction and are a bit close than they are in gas state.

When a substance changes from gas state to liquid state its molecules condenses and becomes more close to each other forming higher molecular attraction.

The gas B have medium molecular attraction and thus will easily liquified with minimum energy transfer whereas, gas C is of less molecular attraction having higher kinetic energy and thus more have to transfer more energy out to liquify.

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5.27x10^45 molecules of h20 is how many moles

Answers

Answer:

6.02 × 10^23 molecules = 1 mole

5.27 × 10^45 molecules = x

x = 5.27 × 10^45/ 6.02 × 10^23 × 1

= 8.754 × 10^21 mol

I don't know if it's correct but based on the question that was the only way I saw how to work it out

______________ is a durable material and is widely used for casting, which is a process by which the melted material is poured into a mold. A. Bronze c. Copper b. Silver d. Gold Please select the best answer from the choices provided A B C D.

Answers

The material that has been widely used in casting has been copper. Thus, option C is correct.

Casting has been the process of molding the liquid into a specific shape with the mold. The casting involves the heating of elements and converting them into liquid. The liquid has been poured into the mold and cooling results in the casted material.

The casted material has been selected based on the boiling temperature, cooling temperature, resistivity, cost-effectiveness, and damping ability.

The material that has been consisted of these characteristics has been copper. Thus, copper has been commonly used for casting. Thus, option C is correct.

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Do you feel that this equation is currently following the law of conservation of mass?

N2 + H2 → NH

Answers

Answer:

N2 + H2 --> 2 NH

Explanation:

You need to add 2 to make it correct

If you wanted to make a crucible for melting sodium (Na), which metal would be most suitable for that purpose

Answers

Calcium would be best suitable

To make a crucible for melting sodium (Na), metals that would be most suitable for that purpose are inert metals or metals like alumina.

What are inert metals?

inert metals are those metals that do not react with other highly reactive metals or in the atmosphere due to the absence of one free electron in the outermost orbital.

The sodium metal is kept in the crucible of the inert metal like alumina because sodium has one free electron in the outer shell and catches fire as come into the contact with the air.

Therefore, to make a crucible for melting sodium (Na), metals that would be most suitable for that purpose are inert metals or metals like alumina.

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i need help with this asap..
1. What has shininess
2.ability to change its shape

Answers

I think it's metal if its abt science

Answer:

i think metal or glass not sure but i think its metal

Explanation:

Four students wrote down their descriptions of rotting.

Nick: Rotting is a chemical change that happens to fruit like strawberries or apples. Rotting happens slower when there is more heat.
Kevin: Rotting is a chemical change that happens to iron objects like nails. It causes iron objects to change color and texture.
Howie: Rotting is a physical change that happens to food like fruit. Rotting happens faster with increased heat and changes a fruits color and odor.
AJ: Rotting is a chemical change that affects food such as fruit. Rotting changes the fruits color and odor and happens faster with increased heat.
Which student had the best description of rotting?

Nick
Kevin
Howie
AJ

Answers

AJ but Kevin would also be right
Hope this helps

Answer:

Technically only AJ got it correct Howie got it wrong because rotting is a chemical not a physical change AJ  was correct becuase he knew what would make the fruit go faster so yes howie would have been right if he got the right kind change.

Explanation:

hope this help

Al + FeCl2 → Fe + AlCl3.

Answers

Answer:

Hope this helps :)

AlCl3 + Fe = Al + FeCl2

Chemical Equation Details aluminum chloride + iron = aluminum + iron(ii) chloride

[tex]\text{Balanced reaction:}\\\\2\text{Al} + 3\text{FeCl}_2 \longrightarrow 3\text{Fe} + 2\text{AlCl}_3[/tex]

in which time period did the first animals that could live both in water and on land appear

Answers

510 million years ago.

how long would it take to electroplate a flute with 28.3 g of silver (107.87 g/mol) at a constant current of 2.0 amps using AgNO3

Answers

It would take 211 hours to plate 28.3 g of silver on a flute.

The equation of the reaction;

Ag^+(aq) + e -----> Ag(s)

We know that 1 F of electricity is required to deposit 107.87 g of Ag. Also 1F = 96500 C

Now;

Since  107.87 g is deposited by 96500 C of electricity

28.3 g is deposited by  28.3 g ×  96500 C/ 107.87 g

= 25317 C

Also;

Q = It

I = current

t = time

25317 C =  2.0 amps × t

t = 25317 C /2.0 amps

t = 12658.5 seconds or 211 hours

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Answer:

It would take [tex]3.5hrs[/tex] to electroplate the flute

Explanation:

Electrolysis equation is:

[tex]Ag1+ + 1e- ------> Ag[/tex]

1 mol of Ag requires 1 mol of electron

1 mol of electron = 96485 C

So,

1 mol of Ag requires 96485 C

let us calculate mol of element deposited:

molar mass of Ag = [tex]107.87 g/mol[/tex]

number of mol of Ag, [tex]n = \frac{mass of Ag}{molar mass of Ag}[/tex]

[tex]n = \frac{28.3}{107.87}\\\\n = 0.2623 mol[/tex]

[tex]total charge = mol of element deposited * charge required for 1 mol\\\\total charge = 0.2623*9.649*10^4\\\\total charge = 2.531*10^4 C[/tex]

Therefore,

[tex]time = \frac{Q}{i}\\\\= \frac{2.531*10^4}{2}\\\\= 1.265*10^4 seconds\\\\= 3.515 hr[/tex]

For more information, visit

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Why are unbalanced equations NOT useful in
chemistry?

Answers

Answer:

If the numbers of each type of atom are different on the two sides of a chemical equationExplanation:

Which description of salt is a physical property?

Answers

Answer:

White being the color and coming in small grains.

Explanation:

Physical properties are something you can clearly see about the object.

Answer:

Hey mate......

Explanation:

This is ur answer....

It was in the lesson, the answer is it is solid and does not conduct electricity.

 

Physical Properties                                 Chemical Properties

White cubic crystals                                 Do not undergo combustion

Odorless, salty taste                                 Make ionic bonds easily

As solids, they do not conduct electricity  The product of mixing acids and bases.

Hope it helps!

Brainliest pls!

Follow me! :)

What are the most important topics for revision in chemistry?​

Answers

Answer:

structure of atom

states of matter

classification of elements and periodicity in properties

thermody namic

Equilibrium

Redox reacation

3.
What relationship do P and V have at a constant temperature? (Direct or Inverse)
1.
What relationship to V and T have at a constant pressure? (Direct or Inverse)
and please don’t put just a link thx

Answers

Answer:

3. Inverse 1. Direct

Explanation:

P- pressure

V - volume

T - temperature

P1*V1 / T1 = P2*V2 / T2 ...... (1)

That's the general gas law with the combined ideas of charles, boyle & lussac.

Whenever you are restricted as "constant" temperature, volume, or pressure...cancel them off of your equation.

in this case 3. is indirectly telling us to cancel the temperature (T).

so we'll be left w P1*V1 = P2*V2

now notice that any relation ship that is multiplied like the one above consists of inversely related quantities. & so we conclude that-

P & V are inversely proportional or have an inverse relationship.

similarly in 1. we'll cancel p off of the general formula (1)

to be left with V1/T1 = V2/T2

also note that quantities involved in division are directly related to each other & hence the answer.

Figure 2

Describe how a dog grows. Describe their mode of reproduction​

Answers

Explanation:

Although all puppies are officially considered adult dogs once they reach one year old, puppies continue to grow in height and size while their bones are still developing, which takes anywhere from 6 to 24 months. Their skeletal growth is what determines how tall they will become as adults.

an atom has 10 protons and a mass number of 18 how many neutrons does it contain

Answers

Answer:

8 i believe

Explanation:

To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, the number of neutrons in the given atom is 8.

What is atom?

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.

Mass number =number of protons + number of neutrons

Atomic number = number of protons= number of electrons

18  =10 + number of neutrons

number of neutrons=8

Therefore, the number of neutrons in the given atom is 8.

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A teacher wrote the following part of a balanced chemical equation:

2HNO3 + Ca ➡️

To show that chemical reactions conserve matter, how many atoms of hydrogen (H) will there be on the right-hand side of the equation?

A. 3
B. 2
C. 1
D. 6​

Answers

Answer:

answer is 2

Explanation:

just did the quiz

Is it unbalanced or balanced if hydrogen reacts to iodine?

Answers

Answer:

unbalanced

Explanation:

because it is REACTing.

In a covalent bond between identical atoms, the electrons are shared between the atoms. If the atoms are not identical, the electron distribution is so that the electrons are closer to one atom than the other. This type of bond is called a(n) covalent bond.

Answers

Answer:

If the atoms are not identical, the electron distribution is electrons are closer to one atom than the other. This type of bond is called a(n) covalent bond.

Explanation:

HELPPPPP ASAP PLSSSS !!!!!!!!!

Answers

Answer:

maybe i can help for you where the question

convert 150 K to degrees F

Answers

Answer:

150K is 253.67°F

Explanation:

There is a simple formula to convert from Kelvin to Celsuis;

C° = K - 273.15

    C = 150 - 273.15     C = -123.15

Then you would convert Celsuis into Fahrenheit using the formula:

[tex]F = \frac{9}{5}C + 32\\[/tex]

    [tex]F = \frac{9}{5}(-123.15)+32\\F = 221.67 + 32 \\F = 253.67[/tex]

PLEASSE HELP gotta get the answers neowww, basically just match the letters with the things.

Answers

Answer:

North pole-A

South pole- F

Equator- E

Polar Easterlies-C

Prevailing Westerlies-D or B-not sure

Trade Winds-D or B-not sure

molecules diffusing with the concentration gradient through a protein channel is

Answers

Answer:

Molecules move up the concentration gradient in facilitated diffusion which requires ATP to be used as molecules naturally move from high to low concentration

Explanation:

The DEA has designated five chemicals often found in spice as _____ controlled substances, making it illegal to sell, buy, or possess these chemicals.

Answers

Answer:

I'm pretty sure this doesn't really connect with chemistry much but the answer should be Schedule 1 as stated by the Drug enforcement agency.

What is the amplitude of the above wave?

Answers

Answer:Amplitude in a longitudinal wave

Explanation:Wave amplitude of a longitudinal wave is the distance between particles of the medium where it is compressed by the wave. Wave amplitude is determined by the energy of the disturbance that causes the wave. A wave caused by a disturbance with more energy has greater amplitude.

Why is the energy supplied by the cooker greater than that calculated in part (a)

Answers

Answer:

136000 J or 136 kJ

Explanation:

Formula

Heat = m * c * deltaH

Givens

m= 0.5 kg

c = 3400 J / (kg * oC)

Deltat = (100oC – 20oC)

deltat = 80oC

Solution

Heat = 0.5 kg * 3400 J/(kg* oC) * 80oC

Heat = 136000 Joules

Heat = 136 kg

Technically there is only 1 place of accuracy.

The density of iron is 7.0 g/cm'. What volume of iron would have a mass of 14.0 g?

Answers

Answer:0.284ib/in 3

Explanation:

[tex]\text{Given that,}\\\\\text{Density of iron, }~ \rho = 7 ~\text{g cm}^{-3} = 7 \times 10^{3}~ \text{kg m}^{-3}\\\\\\\text{Mass, m =14 g =} ~ 14 \times 10^{-3} ~\text{kg}\\\\\\\text{Volume of iron,}~ V = \dfrac{m}{\rho} = \dfrac{14 \times 10^{-3}}{7\times 10^{3}} = 2 \times 10^{-6} ~~ m^3[/tex]

Element of group 2 loses two electrons in the process of a chemical combustion. what is the ionic charge? +2 or -2

Answers

The ionic charge is +2

How many totals atoms are present in the compound : Mg(OH)2

A. 3
B. 4
C. 5
D. 7

Answers

1 atom Mg, 2 atoms O and 2 atoms H.

1 + 2 + 2 = 5, so correct answer is C

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