ExpertEasy1 markMultiple Choice
AQA GCSE · Question 01.7 · Quantitative chemistry
What is the chemical formula for Water?
What is the chemical formula for Water?
Answer options:
A.
CuO
B.
CuS
C.
CuSO₄
D.
H₂O
E.
H₂SO₄
How to approach this question
Recall the common chemical formula for water, which consists of hydrogen and oxygen atoms.
Full Answer
D.H₂O✓ Correct
H₂O
Water is a well-known chemical compound. Its molecule is composed of two hydrogen atoms covalently bonded to a single oxygen atom. The chemical symbol for hydrogen is H and for oxygen is O. The subscript 2 after H indicates there are two hydrogen atoms. Therefore, the formula is H₂O.
Common mistakes
✗ Confusing water with other common compounds like sulfuric acid.
✗ Selecting a formula containing elements not present in water, like copper (Cu) or sulfur (S).
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