How many moles of HCI are neede to prepare 150 mL of a 1.2 M
solution?

0.18 moles HCl

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Unit 0

Conversion: 1000 mL = 1 L

Aqueous Solutions

Molarity = moles of solute / liters of solutionExplanation:

Step 1: Define

150 mL

1.2 M

x moles

Step 2: Identify Conversions

mL to L conversion

Step 3: Convert

= 0.15 L

Step 4: Solve for Moles

Substitute [Molarity]:                    Isolate x:                                       Rewrite:                                        

Step 5: Check

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

Since our final answer is in 2 sig figs, there is no need to round.

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According to edgenuity, the answer is c.