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3 years ago

Which of the following are phase changes? Select all that apply.

Chemistry

2 answers:

lidiya [134]3 years ago

5 0

Answer: Options A, B, C, and D are all representing phase changes.

Explanation:

Phase change means change in the state of a substance from one form to another that is change of a liquid into solid, liquid into gas and vice versa.

In liquid freezing, the liquid is changing into solid so here phase is changing.

In solid melting, solid is changing into liquid so here phase is changing.

In ice melting, solid is changing into liquid so here phase is changing.

In sublimation of a solid, the solid changes to gas without changing into liquid. So, here also phase is changing.

When paper is burning, it is a chemical change as a new substance is formed which cannot be reversed into paper again.

Therefore, options A, B, C, and D are all representing phase changes.

kogti [31]3 years ago

4 0

A, B, C, and D, because they are changing from a solid to a liquid, liquid to solid, and solid to gas. Phase changes are when a solid, liquid, or gas, turns into a solid, liquid, or gas. Ex. Ice melting is a solid changing into a liquid. Hope this helps!

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Which statement could Democritus and Aristotle agree on?

Nimfa-mama [501]

Democritus and Aristotle had argued in the study of atoms as both of them has different perspectives of how atoms are formed and their structure that led to an agreement. The statement of which both of them had only agreed on is that the atoms are made of large numbers and these atoms have different types.

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3 years ago

Which has the least stable configuration?

Anna007 [38]

Answer is: a single atom of chlorine.
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4 years ago

When Wolverine’s 10-pound adamantium claws are dissolved in 100 mL of 10 M nitric acid, 10.7 grams of adamantium nitrate are rec

Mazyrski [523]

The percent yield is 71.3 %.

Explanation:

Percent yield is the measure to analyze the success percentage of any experiment .The percent yield of any experiment can be obtained by the ratio of actual or experimental value to expected or theoretical value multiplied with 100.

$Percent Yield = \frac{Experimental Outcome}{Theoretical Outcome} *100$

So, in the present problem, we have obtained 10.7 g of adamantium nitrate from Wolverine's 10 pound claws. So the actual value or the experimental value is the amount of adamantium nitrate obtained from Wolverine's claws.

Thus, the experimental outcome is 10.7 g. While we had expected to recover 15 g of adamantium nitrate. So the theoretical outcome is 15 g.

$Percent yield = \frac{10.7}{15} * 100 = 71.3 %$

Thus, the percent yield is 71.3 %.

7 0

3 years ago

If 135.7 J of heat are added to 54.0 g of water initially at 25.0 °C . What is the final temperature of the water?

german

Answer:

The final temperature of the water is 25.6 °C.

Explanation:

We have,

Heat added to water is 135.7 J

Mass, m = 54 g

Initial temperature was 25 °C

It is required to find the final temperature of the water. The heat added when temperature is increased is given in terms of specific heat capacity as :

$Q=mc(T_f-T_i)$

$T_f$ is final temperature

c is specific heat capacity, for water, $c=4.184\ J/g^{\circ} C$

So,

$T_f=\dfrac{Q}{mc}+T_i\\\\T_f=\dfrac{135.7}{54\times 4.184}+25\\\\T_f=25.6^{\circ} C$

So, the final temperature of the water is 25.6 °C.

3 0

4 years ago

What is transculent object

Levart [38]

Answer:

Translucent objects allow some light to travel through them

Explanation:

Materials like frosted glass and some plastics are called translucent. When light strikes translucent materials, only some of the light passes through them

3 0

3 years ago