What volume of O2 (

g. at 810. mmHg pressure is required to react completely with a 4.50g sample of C (s) at 48°C? 2 C (s) + O2 (

g. → 2 CO (

g.

Answer is: volume of oxygen is 4.63 liters.

Balanced chemical reaction: 2C + O₂ → 2CO.

m (C) = 4.50 g.

n (C) = m (C) : M (C).

n (C) = 4.50 g : 12 g/mol.

n (C) = 0.375 mol.

From chemical reaction: n (C) : n (O₂) = 2 : 1.

n (O₂) = 0.1875 mol.

T = 48°C = 321.15 K.

p = 810 mmHg : 760 mmHg/atm = 1.066 atm.

R = 0.08206 L·atm/mol·K.

Ideal gas law: p·V = n·R·T.

V (O₂) = n·R·T / p.

V (O₂) = 0.1875 mol · 0.08206 L·atm/mol·K · 321.15 K / 1.066 atm.

V (O₂) = 4.63 L.