J.R. S. answered 06/23/19
Ph.D. University Professor with 10+ years Tutoring Experience
For all of these, you will use PV = nRT in one form or another (solving for either n, P, V or T).
a) convert 7.74x103 Pa to kPa (1 kPa = 1000 Pa); convert 11.7 ml to L(1 L = 1000 ml); convert 25ºC(add 273)
Solve for n = PV/RT where R = 0.0821 Latm/Kmol
b) convert 43.0 ml to L;
Solve for P = nRT/V
c) convert torr to atm (1 atm = 760 torr); convert 331ºC to K (add 273)
Solve for V = nRT/P
d) convert mm Hg to atm (1 atm = 760 mm Hg);
Solve for T = PV/nR and then subtract 273 to get temperature in ºC