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Convert from mL to L:
20/1000 = 0.02
n = c x v
Substitute values in:
n = 0.1 x 0.02 = 0.002 moles
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Answer:
0.002 moles HCl.
Explanation:
There is 0.10 moles in 1 liter so in 20 mls the number of moles
= 0.10 * 20 / 1000
= 0.002 moles.