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Chapter 6: Stoichiometery

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1

Which unit is used for molar mass?

A g B mol C g/mol D kg/mol

2

Bilal is writing the molecular formula for glucose. He knows that the empirical formula is CH2O and the molar mass is 180 g/mol. What is the molecular formula?

A C3H6O3 B C4H8O4 C C5H10O5 D C6H12O6

3

The molecular mass of CH2 is:

A 12 B 14 C 16 D 28

4

Tina is calculating the mass of 0.25 moles of NaCl. The molar mass of NaCl is 58.5 g/mol. What is the mass?

A 14.625 g B 29.25 g C 58.5 g D 7.3125 g

5

Emma is naming binary ionic compounds. She has a compound formed from magnesium and chlorine. What is the correct name for this compound?

A Magnesium chloride B Magnesium dichloride C Magnesium chlorate D Magnesium chlorite

6

If one mole of a substance has mass 44 g, it is likely to be:

A H2O B CO2 C O2 D N2

7

Hina is studying gram atomic mass. She knows that the gram atomic mass of an element is the mass of one mole of atoms of that element. What is the gram atomic mass of oxygen?

A 8 g B 16 g C 24 g D 32 g

8

How many moles are present in 22 g of CO2?

A 0.25 B 0.5 C 1 D 2

9

Patricia is balancing the equation: Al + O2 → Al2O3. What is the correct balanced equation?

A 4Al + 3O2 → 2Al2O3 B 2Al + O2 → Al2O3 C Al + O2 → Al2O3 D 3Al + 2O2 → Al2O3

10

One mole of oxygen gas contains:

A 6.02 × 10^23 atoms B 6.02 × 10^23 molecules C 3.01 × 10^23 molecules D 12.04 × 10^23 atoms