Question

How many moles are in 170 grams of H2O2?
O 0.284 mol H202
O 0.385 mol H202
O 0.500 mol H2O2
O 0.730 mol H2O2
Please help!!!

Answer 1

Answer:

5.0 mol H₂O₂

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

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

• Left to Right

Chemistry

Atomic Structure

• Reading a Periodic Table

Stoichiometry

• Using Dimensional Analysis

Explanation:

Step 1: Define

170 g H₂O₂

Step 2: Identify Conversions

Molar Mass of H - 1.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of H₂O₂ - 2(1.01) + 2(16.00) = 34.02 g/mol

Step 3: Convert

1. Set up:                               $\displaystyle 170 \ g \ H_2O_2(\frac{1 \ mol \ H_2O_2}{34.02 \ g \ H_2O_2})$
2. Divide:                               $\displaystyle 4.99706 \ mol \ H_2O_2$

Step 4: Check

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

4.99706 mol H₂O₂ ≈ 5.0 mol H₂O₂

Answer 2

Answer:

C

Explanation: