Counting Atoms PRACTICE

How many atoms of oxygen are in this compound?

2Ca(OH)₂

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Number of H in 3(NH₄)₂CrO₄

• 4
• 2
• 8
• 24

Tags

NGSS.MS-PS1-1

Which chemical reaction involves the fewest oxygen atoms?

• 2AgNO₃ + K₂SO₄ --> Ag₂SO₄ + 2KNO₃

• 4Fe + 6H₂O + 3O₂ --> 4Fe(OH)₃

• 6CO₂ + 6H₂O --> C₆H₁₂O₆ + 6O₂

• C₂H₄ + 3O₂ --> 2CO₂ + 2H₂O

Which of these formulas contain equal numbers of nitrogen atoms?

• Formulas I and III

• Formulas I and IV

• Formulas I, II and V

• Formulas II and III

Tags

NGSS.MS-PS1-1

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

Tags

NGSS.MS-PS1-1

How many Magnesium are in 10MgCl₂?

• 10
• 5
• 20

Tags

NGSS.MS-PS1-1

Number of H in 3(NH₄)₂CrO₄

• 4
• 2
• 8
• 24

Tags

NGSS.MS-PS1-1

How many O's are in Al₂(SO₄)₃

• 4
• 12
• 7
• 24

Tags

NGSS.MS-PS1-1

How many atoms are there TOTAL in:
H₂SO₄

• 6
• 5
• 7
• 3

Tags

NGSS.MS-PS1-1

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1