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Varvara68 [4.7K]
2 years ago
6

Can someone please help me thx!!!

Chemistry
1 answer:
Rudik [331]2 years ago
6 0

Answer:

the answer should be A

Explanation:

hope this helps you.

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If you weighed out 0.38 g of calcium and reacted it with an excess of hcl, how many moles of h2(g) would you expect to produce?
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Answer is: 0,0095 mol of hydrogen gas will be produced in reaction.
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m(Ca) = 0,38 g.
n(H₂) = ?
n(Ca) = m(Ca) ÷ M(Ca).
n(Ca) = 0,38 g ÷ 40 g/mol
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from reaction: n(Ca) : n(H₂) = 1 : 1.
n(H₂) = n(Ca) = 0,0095 mol.
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