What is the relative formula mass of water, H2O? (H = 1, O = 16)
Answer and explanation
Correct answer: B. 18, found by adding 2 x 1 and 16
- Step 1: Add the masses of all atoms in the formula. Step 2. 2 x 1 + 16 = 18. Answer: 18, found by adding 2 x 1 and 16. Why not the others: The others forget a hydrogen atom or use the wrong operation.
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