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Ad libitum [116K]
3 years ago
10

Matter changes from one state to another when ____________ is added or removed.

Chemistry
2 answers:
Darina [25.2K]3 years ago
7 0

Answer:

<em>Heat</em>

Explanation: When matter is heated enough, the molecules move faster and with greater energy. If enough heat is added, a solid can become liquid and a liquid can become gas. In the same way, molecules slow down when they are cooled.

Luda [366]3 years ago
6 0

thermal energy (heat) is added or removed

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PLEASE PLEASE ANY CHEMISTRY EXPERT!! HELP NEEDED. See attached.
DerKrebs [107]

Answer:

Explanation:

1st)  one are homogenous because the have the same kind of force 9 London force ) all the hydrocarbons are nonpolar and have a London force between their molecules

 so pentane dissolve in hexane (like dissolves like )

2nd )  CBr4  has a tetrahedral shape its a nonpolar compound (London bond )

           but  the water is polar molecules  has a  ( hydrogen bond ) its  molecular shape (bent shape)  . Both do not dissolve in each other because they have a different kinds of bond so they are  <u>not a homogenous solution </u>.

3rd) its a homogenous because the water can dissolve the ionic bonds between the Li (  cation ) and  (NO3 -1  anion ).

4th ) here we can say alcohol can dissolve in a little amount why ?

  1.     pentane has a London force bond
  2. Alcohol has two different parts  first  part  has OH making hydrogen bond which cant dissolve in the pentane different kinds of bonds ,and the other part -CH3 has a London force bond that can dissolves easily in the pentane
  3. so  one part dissolves but  the other part  can't dissolve so the two compound are slightly dissolves in each other  that which mean its <u>not a homogenous solution </u>

7 0
4 years ago
2Fe2O3 + C → Fe + 3CO2 You add 28 grams of carbon. You find the actual yield to be 181.2 grams of CO2. What is the percent yield
den301095 [7]
Heres link to answer


あなたがこの笑を翻訳するなら笑笑hehehelol あなたがこの笑を翻訳するなら笑笑hehehelol あなたがこの笑を翻訳するなら笑笑hehehelol
7 0
3 years ago
the system absorbs 34.7 j from the surroundings in form of heat as it increases its volume to 12.80 l under an external pressure
OleMash [197]

The initial volume of the gas is obtained as 11.02 L.

<h3>What is the initial volume?</h3>

The work done can be obtained from the use of the formula;

W = PΔV

W = work done on the gas

P = pressure of the gas

ΔV = Change in volume

Now we can see that;

Internal energy = 127.5 J or 1.26 Latm

Heat lost = 34.7 J or 0.34 Latm

We now have;

-1.26 = 0.34 -  0.900(12.80 - V1)

-1.26 = 0.34 - 11.52 + 0.9V1

-1.26 + 11.18 = 0.9V1

V1 = -1.26 + 11.18 / 0.9

V1 = 11.02 L

Learn more about work done:brainly.com/question/13031096

#SPJ1

5 0
1 year ago
When can resonance structures be written for a molecule
Serga [27]
When there are pi bonds as well as the sigma bonds, and therefore a double or triple bond. When it can change where that double bond is you can draw a resonance structure. Ozone, O3, has two resonance structures because you can rearrange the bonds in it.
4 0
4 years ago
4 Na + O2 2 Na20 grams of Na are required to produce 52.45 grams of Na2O. Round your answer to the nearest whole number​
lukranit [14]

Answer:

4

N

a

+

O

2

→

2

N

a

2

O

.

By the stoichiometry of this reaction if 5 mol natrium react, then 2.5 mol

N

a

2

O

should result.

Explanation:

The molecular mass of natrium oxide is

61.98

g

⋅

m

o

l

−

1

. If

5

m

o

l

natrium react, then

5

2

m

o

l

×

61.98

g

⋅

m

o

l

−

1

=

154.95

g

natrium oxide should result.

So what have I done here? First, I had a balanced chemical equation (this is the important step; is it balanced?). Then I used the stoichiometry to get the molar quantity of product, and converted this molar quantity to mass. If this is not clear, I am willing to have another go.

Explanation:

5 0
3 years ago
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