Question

How many moles in 435 liters of Krypton gas at STP?

Answer 1

19.4 mol Kr

General Formulas and Concepts:

Chemistry

Stoichiometry

• Using Dimensional Analysis

Gas Laws

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

Math

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Step-by-step explanation:

Step 1: Define

435 L Kr at STP

Step 2: Identify Conversions

[STP] 22.4 L = 1 mol

Step 3: Convert

`435 \ L \ Kr((1 \ mol \ Kr)/(22.4 \ L \ Kr) )` = 19.4196 mol Kr

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

19.4196 mol Kr ≈ 19.4 mol Kr