Answer to Question #198960 in Chemistry for Hsn

Question

1500cm3

of an unknown gas have a pressure of 10000 N/m2

at 30C° find out number of moles of gas present inside 

the container.

Answer 1

P = 10000 N/m² = 10000 Pa

V = 1500 cm³ = 0.0015 m³

n = unknown

R = 8.314 m³ Pa K⁻¹ mol⁻¹

T = 30°C + 273 = 303 K

Solution:

The Ideal Gas Law can be used.

The Ideal Gas Law can be expressed as: PV = nRT

To find the number of moles, solve the equation for n:

n = PV / RT

n = (10000 Pa × 0.0015 m³) / (8.314 m³ Pa K⁻¹ mol⁻¹ × 303 K) = 0.00595 mol = 0.006 mol

n = 0.006 mol

Answer: 0.006 mol of gas present inside the container.