Count the atoms in a chemical formula
8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.MS-PS1-1 · England: KS3 Chemistry: Atoms, elements and compounds
Name
Date
Score/ 16
Question 1
How many O atoms are shown by 3Fe₂O₃?
Answer
Question 2
How many N atoms are in one formula unit of (NH₄)₂SO₄?
Answer
Question 3
How many atoms are there altogether in one molecule or formula unit of CO₂?
Answer
Question 4
How many Mg atoms are shown by 5Mg(NO₃)₂?
Answer
Question 5
How many O atoms are in one formula unit of Al₂(SO₄)₃?
Answer
Question 6
How many atoms are there altogether in one molecule or formula unit of CO₂?
Answer
Question 7
How many Cu atoms are shown by 4CuSO₄?
Answer
Question 8
How many H atoms are in one formula unit of C₂H₅OH?
Answer
Question 9
How many atoms are there altogether in one molecule or formula unit of H₂O?
Answer
Question 10
How many N atoms are shown by 3(NH₄)₂SO₄?
Answer
Question 11
How many O atoms are in one formula unit of CuSO₄?
Answer
Question 12
How many atoms are there altogether in one molecule or formula unit of CaCO₃?
Answer
Question 13
How many O atoms are shown by 2Fe₂O₃?
Answer
Question 14
How many H atoms are in one formula unit of C₂H₅OH?
Answer
Question 15
How many atoms are there altogether in one molecule or formula unit of CaCO₃?
Answer
Question 16
How many O atoms are shown by 2H₂SO₄?
Answer
All done? Color in the animal! · Free from eurekami.com/math