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Keith_Richards [23]
3 years ago
6

Provide at least three indicators of a chemical change that are present in burning a piece of paper.

Chemistry
1 answer:
Pie3 years ago
3 0

Answer:

Some chemical indicators perceived while a piece of paper is burning are:

Production of an Odor: there is a smell of burnt paper

Change in Temperature:  combustion is a highly exothermic reaction , so the temperature increase

Change in Color: paper changes to ashes as the burning process occurs

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The mass of a system does not change during a chemical reaction

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Convert the pressure 525.4 torr to kPa.
Oduvanchick [21]

Answer:

Option A. 70.0 KPa.

Explanation:

Data obtained from the question include:

Pressure (torr) = 525.4 torr

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The pressure expressed in torr can be converted kPa as shown below:

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Therefore,

525.4 torr = (525.4 x 101.325) / 760 = 70.0 KPa.

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Answers in explanation.

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