Question

Calculate the molar mass for each of the following gases given the STP density.

(a) ozone, 2.14 g/L
(b) silane, 1.43 g/L
(c) nitric oxide, 1.34 g/L
(d) Freon-22, 3.86 g/L

Answer 1

To calculate the molar mass of each gas given the density at STP, use the equation: Molar mass = density × molar volume at STP. Then, plug in the given density values and multiply by the molar volume of 22.4 L/mol to find the molar masses of the gases.

Step-by-step explanation:

To calculate the molar mass of each gas given the density at STP, we can use the equation:

Molar mass = density × molar volume at STP

The molar volume at STP is 22.4 L/mol. So:

(a) Ozone: Molar mass = 2.14 g/L × 22.4 L/mol = 47.9 g/mol

(b) Silane: Molar mass = 1.43 g/L × 22.4 L/mol = 32.0 g/mol

(c) Nitric oxide: Molar mass = 1.34 g/L × 22.4 L/mol = 30.0 g/mol

(d) Freon-22: Molar mass = 3.86 g/L × 22.4 L/mol = 86.5 g/mol