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Marysya12 [62]
2 years ago
14

Question 21

Chemistry
1 answer:
Mumz [18]2 years ago
5 0
There are 2 moles of O stones present in 88 grams of CO2. Why? Well, we can find the amount of moles present in 88 grams of CO2 by dividing the mass by the molar mass. The mass of CO2 comes out to be 88 grams. The molar mass of CO2 comes out to be 44 grams. Because 88 is the mass of CO2 and 44 is the molar mass of CO2, we can divide 88 by 44 to identify that there are 2.0 moles of O atoms present in 88 grams of CO2.

Your final answer: There are 2.0 moles of O atoms present in 88 grams of CO2. Your final answer to this question is D, or 2.0 moles. If you need to better understand, let me know and I will gladly assist you.
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Explanation:

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Question 2
vovangra [49]

Answer:

Option e is correct

The heat required to increase the temperature of copper metal by 1 degree is 0.754 j .

Explanation:

Given data:

specific heat of copper = 0.377 j/g.°C

Heat required to increase temperature = ?

Mass of copper = 2.00 g

Change in temperature = 1°C

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Q = m.c. ΔT

Q = 2 g× 0.377 j/g.°C × 1°C

Q = 0.754 j

The heat required to increase the temperature of copper metal by 1 degree is 0.754 j .

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andriy [413]

Answer:

Plates

Explanation:

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