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Multiple Choice
What is the mass in grams of 185 mL of Freon gas (CCl2F2) at 0.944 atm and 17°C, using the Ideal Gas Law?
A
2.01 grams
B
1.56 grams
C
0.98 grams
D
1.23 grams
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Verified step by step guidance
1
First, convert the temperature from Celsius to Kelvin by adding 273.15 to the Celsius temperature. So, 17°C becomes 290.15 K.
Next, use the Ideal Gas Law, which is expressed as , where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature in Kelvin.
Convert the volume from milliliters to liters by dividing by 1000. Therefore, 185 mL becomes 0.185 L.
Use the Ideal Gas Law to solve for n (number of moles): . Use R = 0.0821 L·atm/mol·K.
Finally, calculate the mass using the molar mass of Freon (CCl2F2), which is approximately 120.91 g/mol. Multiply the number of moles by the molar mass to find the mass in grams.