Mole Calculations #2 - Edubirdie

University:
Everett Community College
Course:
CHEM 161 | General Chemistry I with Lab
Academic year:

2012
Views:

393

Pages:

1
Author:

Mariah Mayer

Mole Calculations #2 Solutions 1) What is the mass of 0.750 moles of ZnSO4? 0.750 mole ZnSO4 x 161.5 g ZnSO4 = 121 g ZnSO4 1 mole ZnSO4 2) How many molecules are there in 0.435 moles of C6H12O6? 0.435 mole C6H12O6 x 6.022 x 1023 molecules C6H12O6 = 2.62 x 1023 molecules C6H12O6 1 mole C6H12O6 3) How many moles are there in 7.62 x 1025 molecules of oxygen? 7.62 x 1025 molecules O2 x 4) 1 mole O2 6.022 x 1023 molecules O2 = 127 moles O2 How many grams do 3.294 x 1021 molecules of FeSO4 mass? 3.294 x 1021 molecules FeSO4 x 1 mole FeSO4 x 151.9 g FeSO4 6.022 x 1023 molecules FeSO4 1 mole FeSO4 = 0.8309 g FeSO4 5) How many molecules are there in 63.92 grams of CCl4? 63.92 grams CCl4 x 1 mole CCl4 x 6.022 x 1023 molecules CCl4 153.8 g CCl4 1 mole CCl4 = 2.503 x 1023 molecules CCl4

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