Module 4 Review

How many atoms of hydrogen are in 3 molecules of PH₃?

• 3

• 6

• 9

• 12

How many atoms of chromium are in 10 molecules of Cr₂S₃?

• 10

• 20

• 30

• 40

How many atoms of phosphorus are in 6 molecules of K₃PO₄?

• 6

• 12

• 18

• 24

How many atoms of sodium are in 15 molecules of NaCl?

• 1

• 3

• 5

• 15

How many atoms of oxygen are in 4 molecules of Al(OH)₃?

• 3

• 4

• 7

• 12

What are the coefficients to balance the following equation?

__Li + __F₂ --> __LiF

• 1, 1, 1

• 2, 1, 2

• 1, 2, 1

• 2, 2, 2

What are the coefficients to balance the following equation?

__CaSO₄ --> __CaS + __O₂

• 1, 1, 1

• 1, 1, 2

• 1, 2, 2

• 2, 2, 2

What are the coefficients to balance the following equation?

__C₂H₈ + __O₂ --> __CO₂ + __H₂O

• 1, 2, 2, 2

• 1, 2, 2, 3

• 1, 3, 4, 2

• 1, 4, 2, 4

What are the coefficients to balance the following equation?

__MgF + __I₂ --> __MgI₂ + __F₂

• 2, 2, 2, 1

• 2, 1, 2, 1

• 1, 2, 1, 2

• 1, 1, 1, 2

What are the coefficients to balance the following equation?

__BeCl₂ + __Na₂O --> __NaCl + __BeO

• 1, 1, 1, 1

• 2, 1, 2, 1

• 1, 2, 1, 1

• 1, 1, 2, 1