In: Chemistry
Air is a mixture of several gases. The 10 most abundant of these gases are listed here along with their mole fractions and molar masses.
What mass of carbon dioxide is present in 1.00 m3 of dry air at a temperature of 25 ∘C and a pressure of 647 torr?
Component | Mole fraction | Molar mass (g/mol) |
Nitrogen | 0.78084 | 28.013 |
Oxygen | 0.20948 | 31.998 |
Argon | 0.00934 | 39.948 |
Carbon dioxide | 0.000375 | 44.0099 |
Neon | 0.00001818 | 20.183 |
Helium | 0.00000524 | 4.003 |
Methane | 0.000002 | 16.043 |
Krypton | 0.00000114 | 83.80 |
Hydrogen | 0.0000005 | 2.0159 |
Nitrous oxide | 0.0000005 | 44.0128 |
PV = nRT
P = 647torr = 647/760 = 085atm
V = 1m^3 = 1000L
T = 250C = 25+273 = 298K
n = PV/RT
= 0.85*1000/0.0821*298 = 34.74moles ...this moles of dry air
moles of CO2 = 34.74*0.000375 = 0.013 moles
mass of CO2 = no of moles * gram molar mass
= 0.013*44 = 0.572g >>>>>answer