# chem homework help.... For an ideal gas, calculate the following quantities. (a) The pressure of the gas if 0.145 mol occupies 207 mL a...?

For an ideal gas, calculate the following quantities.

(a) The pressure of the gas if 0.145 mol occupies 207 mL at 35°C.

_____ atm

(b) The temperature (in kelvins) at which 0.0260 mol occupies 3.00 L at 0.593 atm.

_____ K

(c) The number of moles in 4.00 L at -2°C and 745 torr. Remember 1atm = 760 torr.

_____ mol

(d) The volume occupied by 8.72 10-3 mol at 40.°C and a pressure of 1.37 kPa. Remember 1 atm = 101.325 kPa

_____ L

### 1 Answer

- Roger the MoleLv 71 year agoFavorite Answer
(a)

P = nRT / V = (0.145 mol) x (0.08205746 L atm/K mol) x (35 + 273) K / (0.207 L) = 17.7 atm

(b)

T = PV / nR = (0.593 atm) x (3.00 L) / ((0.0260 mol) x (0.08205746 L atm/K mol)) = 834 K

(c)

n = PV / RT = (745 torr) x (4.00 L) / ((62.36367 L torr/K mol) x (-2 + 273) K) = 0.176 mol

(d)

V = nRT / P = (8.72 x 10^-3 mol) x (8.3144621 L kPa/K mol) x (40 + 273) K / (1.37 kPa) = 16.6 L

thanks again!