Calculate the volume of 2.4 moles of a gas at STP (1 point) A. 70.301 L B. O33.836 L C. 14.344 L D. O 53.684 L E. 46.869 L How many grams are there in a sample of carbon di-oxide ( CO2 gas that occupies a volume of 10 L at a pressure of 110 kPa and a temperature of 30 C. (atomic masses of carbon and oxygen are 12 and 16 u respectively.) (1 point) A. 11.989 B. (02.583 C. 24.566 D. O13.943 E. O 19.245 Calculate the pressure of a sample of a gas that contains 7e23 molecules and occupies a volume of 80 L at a temperature of 50 4C. (1 point) A. 39.002 kPa B. O12.314 kPa C. 30.742 kPa D. O 23.502 kPa E. 59.158 kPa Solution Q1 Volume=2.4*22.4l=53.684 l Q2 n=PV/RT=0.4366 mass of 1 mole=44 g total mass=19.245 g Q3 n=7*10^23/6.023810^23=1.16 P=nRT/V=39.002 kPa .

1. Calculate the volume of 2.4 moles of a gas at STP (1 point) A. 70.301 L B. O33.836 L C. 14.344
L D. O 53.684 L E. 46.869 L How many grams are there in a sample of carbon di-oxide ( CO2
gas that occupies a volume of 10 L at a pressure of 110 kPa and a temperature of 30 C. (atomic
masses of carbon and oxygen are 12 and 16 u respectively.) (1 point) A. 11.989 B. (02.583 C.
24.566 D. O13.943 E. O 19.245 Calculate the pressure of a sample of a gas that contains 7e23
molecules and occupies a volume of 80 L at a temperature of 50 4C. (1 point) A. 39.002 kPa B.
O12.314 kPa C. 30.742 kPa D. O 23.502 kPa E. 59.158 kPa
Solution
Q1
Volume=2.4*22.4l=53.684 l
Q2
n=PV/RT=0.4366
mass of 1 mole=44 g
total mass=19.245 g
Q3
n=7*10^23/6.023810^23=1.16
P=nRT/V=39.002 kPa