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Stoichiometric Calculations — Quiz

Question 10 • Chemistry

The chemical equation shows the reaction between tin Sn and hydrogen fluoride HF Sn plus 2 HF rightarrow SnF sub 2 plus cap h sub 2 The molar mass of HF is 20 point 0 1 g over mol How many moles of Sn are required to react completely with 40 g of HF ?

Answer
A
1 mole
B
2 moles
C
3 moles
D
4 moles

Explanation

First convert HF to moles: 40 g ÷ 20.01 g/mol ≈ 2.00 mol HF. The equation shows that 2 mol HF react with 1 mol Sn, so 2.00 mol HF require 1 mol Sn. The correct choice is A, 1 mole.

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