Chemistry, 16.10.2021 21:20 holytreesaroy

A nickel coin is actually made of 75% copper and 25% nickel. A nickel coin weighs 5.0 grams. a) The atomic mass of copper is 63.546 amu. How many moles and how many atoms of
copper are in one nickel coin?
Step 1: Find 75% of 5.0 grams.
(0.75)(5.0) =
g of Cu
Step 2: Use the amount to calculate the number of moles.
g of Cu
1 mol C
mol Cu
63.546 g of Cu

Answers: 3

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