Question

The volume occupied by 11.5 g of carbon dioxide at STP is approximately equal to: 

(A) 5.9 L 

(B) 22.5 L 

(C) 86 L 

(D) 259 L

Answer 1

Correct option is: (A) 5.9 L

Molecular weight of \(CO_2\) = 44g/mol

Number of moles\(CO_2\) = \(\frac {11.5}{44}mol\)

= 0.26 mol

Using ideal gas equation

PV = nRT

V = \(\frac {0.26\times 0.082\times 273}{1\, atm}\) 

V = 5.82 L

Answer 2

Correct option is (A) 5.9 L