Question

Find the volume of a gas if 3.6 mols of the gas is at STP

Answer 1

Answer:

81 L gas

General Formulas and Concepts:

Ideal Gas Law

• STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K

Stoichiometry

• Using Dimensional Analysis

Explanation:

Step 1: Define

[Given] 3.6 mols gas at STP

[Solve] volume (L) of gas

Step 2: Convert

1. [DA] Set up:                                                                                                       $\displaystyle 3.6 \ mol \ gas(\frac{22.4 \ L \ gas}{1 \ mol \ gas \ at \ STP})$
2. [DA] Multiply [Cancel out units]:                                                                      $\displaystyle 80.64 \ L \ gas$

Step 3: Check

Follow sig fig rules and round. We are given 2 sig figs.

80.64 L gas ≈ 81 L gas