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It is found that 250 ml of gas at STP has a mass

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It is found that 250 ml of gas at STP has a mass of 1.00 gram. What is the molar mass?
a. 89.6 gram/mol
b. 28.0 gram/mol
c. 14.0 gram/mol
d. 22.4 gram/mol

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Solution Preview

According to the ideal gas law:
PV=nRT

At STP conditions:
P = 1 atm
T = 273 K
R = 0.08206 (Latm/molK)

Hence substitute ...

Solution Summary

The solution provides detailed explanations and answer for the ideal gas problem.

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See attached file for full problem description.

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H2S + H2O --> H2 + SO2
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5. Consider the reaction between 100.0mL of a liquid alcohol, C3H7OH (density = 0.881g/mL) and 35.0 L of oxygen gas, O2, AT 17 Celsius and at a pressure of 1.33 atm. The products of this reaction are carbon dioxide gas (CO2) and water vapor (H2O). Calculate the mass of water vapor formed.

6. It is found that 250mL of gas at STP has a mass of 1.00g. What is the molar mass?

7. Which conditions of Pressure, Temperature, and moles (n), respectively, are most ideal?
a) high P, high T, high n
b) low P, low T, low n
c) high P, low T, high n
d) low P, high T, high n
e) low P, high T, low n

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