Chemical formulae
8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.MS-PS1-1 · England: KS3 Chemistry: Atoms, elements and compounds, KS4 Combined Science: Chemical changes
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Question 1
How many atoms in total are in one molecule (formula unit) of sulfuric acid, H₂SO₄?
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Question 2
How many different elements are in sodium chloride, NaCl?
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Question 3
How many carbon atoms (C) are in CO₂?
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Question 4
How many atoms in total are in one molecule (formula unit) of methane, CH₄?
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Question 5
How many different elements are in sodium chloride, NaCl?
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Question 6
How many sulfur atoms (S) are in H₂SO₄?
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Question 7
How many atoms in total are in one molecule (formula unit) of magnesium oxide, MgO?
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Question 8
How many different elements are in iron(III) oxide, Fe₂O₃?
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Question 9
How many sodium atoms (Na) are in NaOH?
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Question 10
How many atoms in total are in one molecule (formula unit) of water, H₂O?
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Question 11
How many different elements are in water, H₂O?
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Question 12
How many oxygen atoms (O) are in MgO?
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Question 13
How many atoms in total are in one molecule (formula unit) of water, H₂O?
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Question 14
How many different elements are in methane, CH₄?
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Question 15
How many iron atoms (Fe) are in Fe₂O₃?
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Question 16
How many atoms in total are in one molecule (formula unit) of sulfuric acid, H₂SO₄?
Answer
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