Question

periodic table
what is the density of carbon monoxide gas at stp conditions?
a. 1.25 g/l
b. 0.800 g/l
c. 0.625 g/l
d. 22.4 g/l

Explanation:

Step1: Find molar mass of CO

Molar mass of C = 12.01 g/mol, molar mass of O = 16.00 g/mol.
$\text{Molar mass of CO} = 12.01 + 16.00 = 28.01 \, \text{g/mol}$

Step2: Use STP molar volume

At STP, 1 mole of gas = 22.4 L.

Step3: Calculate density

Density = $\frac{\text{Molar Mass}}{\text{Molar Volume}}$
$\text{Density} = \frac{28.01 \, \text{g/mol}}{22.4 \, \text{L/mol}} \approx 1.25 \, \text{g/L}$

Answer:

A. 1.25 g/L