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A sample of a gas collected at 300.0 K and 740.0 mm Hg pressure has a mass of 0.805 grams and occupies a volume of 250.0 mL.

What volume would this gas occupy at STP? -

What is its molar mass? _

User Tim Yao
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1 Answer

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Final answer:

To find the volume of the gas at STP, use the ideal gas law equation PV = nRT. Convert the mass of the gas to moles using the molar mass to find the number of moles. Finally, use the number of moles and the ideal gas law equation to calculate the volume at STP.

Step-by-step explanation:

To find the volume of the gas at STP, we need to use the ideal gas law that states PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

At STP, the pressure is 1 atm and the temperature is 273 K. We can rearrange the equation to solve for V: V = (nRT)/P.

To find the number of moles, we need to convert the mass of the gas to moles using the molar mass. The molar mass can be found by dividing the mass of the gas by the number of moles.

Thus, we can calculate the volume the gas would occupy at STP and its molar mass using the given information.

User Matthew Thomas
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