Answer
2.4 moles HF
Work Step by Step
From the left side of the equation we see:
Na2SiO3 + 8HF -->
Therefore, we need 8 moles of HF for each mole of Na2SiO3.
If we have 0.3 mole Na2SiO3 then we would need 0.3*8 = 2.4 moles HF
Chemistry: The Central Science (13th Edition)
by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.
Published by
Prentice Hall
ISBN 10:
0321910419
ISBN 13:
978-0-32191-041-7
Chapter 3 - Chemical Reactions and Reaction Stoichiometry - Exercises - Page 116: 3.61a
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