How many moles of carbon monoxide gas in 13.7L at STP

0.0611 mol

Explanation:

Use equation:

PV = nRT

Questions tells us that the volume is 13.7 L

The pressure at STP is 1 atm

The temperature at STP is 273 K

The gas constant is 0.0821  atm L

Rearranged to give us n:

n = PV / RT

n = (1 atm) (13.7 L) / (0.0821 atm L ) (273 K)

n = 0.0611 mol (3 sig figs)

pie chart because it is in percents ( % )