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g100num [7]
3 years ago
9

Claims · Evidence • Reasoning A student

Chemistry
1 answer:
sashaice [31]3 years ago
3 0
As with the properties of a substance, the changes that substances undergo can be classified as either physical or chemical. During physical changes a substance changes its physical appearance, but not its composition. The evaporation of water is a physical change.

(I searched that up but here’s an explanation with my own words that you can use):

Change in matter can be classified as a physical change as well as a chemical change due to the properties of substance. A physical change changes substance within its appearance but not its composition. For an example: The evaporation of water is a physical change.

There you go hopefully that helped
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densk [106]

Answer:

351.43mL

Explanation:

To calculate the original volume of hydrogen gas in this question, the Boyle's law equation will be used. Boyle's law equation is:

P1V1 = P2V2

Where; P1 = initial pressure

V1 = initial volume

P2 = final pressure

V2 = final volume

According to this question, the P1= 1.56atm, V1 = ?, P2 = 0.73atm, V2 = 751mL

Hence;

P1V1 = P2V2

1.56 × V1 = 0.73 × 751

1.56 V1 = 548.23

V1 = 548.23/1.56

V1 = 351.43mL

Therefore, the original volume of hydrogen gas is 351.43 mL.

4 0
3 years ago
Which statement describes both homogeneous mixtures and heterogeneous mixtures?
Lana71 [14]

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6 0
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Why is it permissible to use a wet bottle when first obtaining your kmno4 solution?
Murrr4er [49]
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A car with a mass of 3700kg. accelerates at a rate of 8.0 m/s^2 in the backward direction. What is the net force acting on the c
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Answer:

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