What is the weight of 12 moles of water

220 g H₂O

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Atomic Structure

Reading a Periodic Table

Stoichiometry

Using Dimensional AnalysisExplanation:

Step 1: Define

12 moles H₂O (water)

Step 2: Identify Conversions

Molar Mass of H - 1.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of H₂O - 2(1.01) + 16.00 = 18.02 g/mol

Step 3: Convert

Set up:                    Multiply:                  

Step 4: Check

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

216.24 g H₂O ≈ 220 g H₂O

Option C. 2234 J

Explanation:

From the question given, we obtained the following information:

m = 12kg

h = 19m

g = 9.8m/s2

P.E =?

P.E = mgh

P.E = 12 x 9.8 x 19

P.E = 2234J