All calculations involving gases must have the temperature in kelvins, not in degrees Celsius. Volume and pressure are both directly proportional to kelvin temperature. Test reference is p.436-449.
Homework: p.446 #5, 6, 8, 11; p.449 #13; p.451 #4
Homework: p.446 #5, 6, 8, 11; p.449 #13; p.451 #4