The pressure of O2 in a 15.0 L flask is 0.581 atm at 52 °C. What mass of O2 is in the flask?
I think it is A
- billrussell42Lv 73 years ago
PV = nRT
n = number of moles
R = gas constant = 0.08206 (atm∙L)/(mol∙K)
T = temperature in kelvins
P = absolute pressure in atm
V = volume in liters
"pressure of O2 in a 15.0 L flask is 0.581 atm at 52 °C"
n = PV/RT = (0.581)(15) / (0.08206)(273.15+52) = 0.327 moles
O₂ has a molecular weight of 2•16 g/mol
0.327 moles x 32 g/mol = 10.45 g (c)