Unit 2 CBA Review

How many atoms are represented in the reactants in the equation?

• 6

• 7

• 4

• 5

In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?

• H₃PO₄

• H₂SO₄

• HCIO₃

• H₂O

The chemical formula for sodium sulfate is Na₂SO₄. How many sulfur atoms are in the formula for sodium sulfate?

• 1

• 2

• 6

• 7

How many atoms of oxygen are in a molecule of glucose (C₆H₁₂O₆)?

• 4

• 6

• 12

• 24

How many atoms in all are found in the compound above?

• 3

• 4

• 5

• 6

How many elements are in C₆H₁₂O₆?

• 1

• 2

• 3

• 4

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

How many O's are in Al₂(SO₄)₃

• 4
• 12
• 7
• 24

Sodium sulfate is used in laundry detergent. It is a compound that contains 2 atoms of sodium, 1 atom of sulfur, and 4 atoms of oxygen. What is the correct chemical formula for sodium sulfate?

• NA₂SO₄

• Na₂S₂O₄

• Na₂SO₄

• Na₂SO₈