Question

What is the mass of 5.0mol of NaOh

Answer 1

200 g NaOH

General Formulas and Concepts:

• Reading a Periodic Table
• Dimensional Analysis

Step-by-step explanation:

Step 1: Define

5.0 mol NaOH

Step 2: Define conversions

Molar Mass of Na - 22.99 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of H - 1.01 g/mol

Molar Mass of NaOH - 22.99 + 16.00 + 1.01 = 40 g/mol

Step 3: Convert using DA

`5.0 \ mol \ NaOH((40 \ g \ NaOH)/(1 \ mol \ NaOH) )` = 200 g NaOH

Step 4: Check

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

We only have 1 sig fig in 200. No need to round.