what weight of zinc would be required to produce enough hydrogen to reduce completely 8.5 gram of copper oxide to Copper
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6.9g
Explanation:
8.5g/(63.5 + 16) = weight/65
⇒8.5/79.5 × 65 = weight
⇒weight = 8.5 × 65/79.5 = 6.9 g
Hence , zinc would be required = 6.9g
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