Question

How many moles of an ideal gas would occupy a 25.0-liter container when the temperature is 22.0° C and the pressure is 646 torr?

Answer 1

1.4 moles (It comes out to 11.36, I'm assuming your prof just rounded it up).
#13 84.2 mm Hg #14 7.9% KBr #15 9.3 M HCl 16. 4.7 mol NaOH

Answer 2

0.877 mol

Step-by-step explanation:

Given data

• Volume (V): 25.0 L

• Temperature (T): 22.0°C + 273.15 = 295.2 K

• Pressure (P): 0.850 atm

646 torr × (1 atm/760 torr) = 0.850 atm

• Ideal gas constant (R): 0.08206 atm.L/mol.K

• Moles (n): ?

We can find the moles of the ideal gas using the ideal gas equation.

P × V = n × R × T

n = P × V / R × T

n = 0.850 atm × 25.0 L / (0.08206 atm.L/mol.K) × 295.2 K

n = 0.877 mol