Question

If you have 116 grams of Table Salt (NaCl), how many moles of salt do you have?

a
Ob
1.99 g
3.27 g
5.05 g
0.50 g
d
Question 8 point

Answer 1

a. 1.99 mol

General Formulas and Concepts:

Chemistry - Atomic Structure

• Reading a Periodic Table
• Using Dimensional Analysis

Step-by-step explanation:

Step 1: Define

116 g NaCl

Step 2: Identify Conversions

Molar Mass of Na - 22.99 g/mol

Molar Mass of Cl - 35.45 g/mol

Molar Mass of NaCl - 22.99 + 35.45 = 58.44 g/mol

Step 3: Convert

`116 \ g \ NaCl((1 \ mol \ NaCl)/(58.44 \ g \ NaCl) )` = 1.98494 mol NaCl

Step 4: Check

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

1.98494 mol NaCl ≈ 1.98 mol NaCl