almost.
n = 0.0079? Why did you throw away the 1 on 0.00791. You have three places in yur other numbers; you should keep three for the answers. Then if I multiply 0.00791 x 16 I get 0.1265678 which rounded to 3 s.f. is 0.127grams CH4.
Methane is formed in landfills by the action of certain bacteria on buried organic matter. If a sample of methane collected from a landfill has a volume of 200. mL at 741 torr and 27.2 °C, how many grams of methane are in the sample?
I get the PV=nRT
p is 741/760= .975
V to L 200mL =.200L
T to K 27.2+273.15= 300.4
.975atm x .200L = n x .08205 x 300.4
.195=n x 24.6164
= .0079
.0079 x mm CH4
So 1.267? Does that sound right?
1 answer