Hydrogen burns in oxygen: . How many moles of oxygen react completely with 4 mol of hydrogen?
Answer and explanation
Correct answer: A.
- Step 1: The balanced equation gives .
- Step 2: mol.
Answer
.
Why not the others: : the mole ratio was applied the wrong way round. : a 1:1 ratio was assumed. : an extra factor of 2 was applied.
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