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pogonyaev
3 years ago
7

Which of these measurements is expressed as three significant figures?

Chemistry
1 answer:
kipiarov [429]3 years ago
6 0

Which of these measurements is expressed as three significant figures?  


C. 4.20 g


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A balloon is filled with 0.250 mole of air at 35°C. If the volume of the balloon is 6.23 liters, what is the absolute pressure
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Answer is:  the absolute pressure of the air in the balloon is 1.015 atm (102.84 kPa).

n = 0.250 mol; amount of substance.

V = 6.23 L; volume of the balloon.

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Ideal gas law: p·V = n·R·T.

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p = 0.250 mol · 0.08206 L·atm/mol·K · 308.15 K / 6.23 L.

p = 1.015 atm; presure of the air.

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