Answer:
d. A single replacement reaction.
Explanation:
The zinc replaces the hydrogen in the hydrochloric acid.
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We use the following formula to calculate the number of atoms:
n (mol) = N(number of atoms) / NA
N(He) = n(mol) · NA
N(He) = 2,0 moles · 6.02·1023 = 12.04·1023 atoms
Answer:
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Explanation:
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