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sattari [20]
3 years ago
8

Students are studying how two substances react. The students mix substance 1 with substance 2 in a solution. Later the students

boil the solution, releasing substance 1 as a gas and leaving substance 2 as a solid. What type of change is described in the paragraph above? How do you know?
This is a chemical change, because the two substances were mixed together.


This is a chemical change, because the two substances were separated chemically by boiling.


This is a physical change, because the two substances were separated physically by boiling.


This is a chemical change, because a gas was released.
Chemistry
1 answer:
Mashutka [201]3 years ago
4 0

This is a chemical change, because a gas was released.

One of the substances must have evolved the gas and changed into something else (a chemical change).

Mixing two substances and separating them by boiling are <em>physical changes</em>.

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What is the electron structure of a beryllium ion with a net ionic charge of +2?
marishachu [46]

The answer to this question is 1s^2.

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4 years ago
The melting point of copper is 1084 Celsius. How does the energy of the particles in a certain amount of liquid copper compare t
matrenka [14]
The melting point of the solid form of water, which is ice, is 0°C. When we convert both temperatures to kelvin by adding 273 to each we get the melting point of copper as 1357K and that of ice is 273K. Then, dividing the melting point of copper by the melting point of ice, both in absolute temperature scale. The answer would be 4.97. Thus, the energy of molecules of copper is approximately {five} times compared to that of water
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3 years ago
what is the mass (in grams) of chlorine required to react with 10.0 g of sodium metal to produce sodium chloride?
Gnoma [55]

The mass of chlorine required to react with 10.0 g of sodium metal to produce sodium chloride is 15.26 g.

The balanced chemical reaction is :

<em>            2Na + Cl₂ → 2NaCl</em>

<em />

Given data :

Mass of sodium = 10.0 g

Number of moles of Na -

Number of moles = <u>  Given mass  </u>

                                    Molar mass

Number of moles = <u> 10.0 g</u> = 0.43 mol

                                  23 g

Comparing moles of Na and Cl₂ from the balanced chemical equation,

                                            Na        :        Cl₂

                                             2          :         1

                                             0.43     :        <u> 1 </u> x 0.43 = 0.215 mol

                                                                   2

Mass of chlorine gas :

          (molar mass of chlorine = 71 g)

Mass of chlorine = number of moles x molar mass

Mass = 0.215 mol x 71 g/mol

          = 15.26 g

To learn more about sodium and chlorine,

brainly.com/question/14588368

#SPJ4

7 0
1 year ago
13. What does 2n^2 stand for?
Sever21 [200]

Answer:

2n² is a formula that determines that the maximum number of electrons should be accommodated in a particular shell.

Explanation:

4 0
3 years ago
A canoe displaces 100 L of water. Water weighs 9.8 N/L. What is the buoyant force on the canoe?
Setler79 [48]

Hey there!


The Buoyant force is going to be equal to the weight of the water displaced and it would be like this 100 L(9.8 N/L) = 980 N.



Hope this helped and mind marking me brainliest. Thank you!

5 0
4 years ago
Read 2 more answers
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