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
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Date
Score/ 16
Question 1
How many atoms are there altogether in one molecule or formula unit of H₂SO₄?
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Question 2
How many O atoms are in one formula unit of Ca(OH)₂?
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Question 3
How many C atoms are shown by 2Na₂CO₃?
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Question 4
How many atoms are there altogether in one molecule or formula unit of C₆H₁₂O₆?
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Question 5
How many H atoms are in one formula unit of C₂H₅OH?
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Question 6
How many S atoms are shown by 3CuSO₄?
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Question 7
How many atoms are there altogether in one molecule or formula unit of CaCO₃?
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Question 8
How many Al atoms are in one formula unit of Al₂(SO₄)₃?
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Question 9
How many O atoms are shown by 5Mg(NO₃)₂?
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Question 10
How many atoms are there altogether in one molecule or formula unit of C₆H₁₂O₆?
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Question 11
How many S atoms are in one formula unit of Al₂(SO₄)₃?
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Question 12
How many H atoms are shown by 5NH₃?
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Question 13
How many atoms are there altogether in one molecule or formula unit of CaCO₃?
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Question 14
How many O atoms are in one formula unit of Na₂CO₃?
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Question 15
How many O atoms are shown by 3C₆H₁₂O₆?
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Question 16
How many atoms are there altogether in one molecule or formula unit of H₂O?
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