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A length of copper wire has a mass of 5.97 g. How many moles of copper are in the wire?

User LucG
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1 Answer

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20 votes

Answer:

0.0939 moles Cu

Step-by-step explanation:

To find the amount of copper in moles, you need to multiply the given mass (g) by the atomic mass (g/mol) of copper. The atomic mass is a ratio which represents the mass of copper per every 1 mole. The ratio should be arranged in a way that allows for the cancellation of units (grams should be in the denominator to cancel the units of the starting mass). The final answer should have 3 sig figs like the given value (5.97 g = 3 sig figs).

Atomic Mass (Cu): 63.546 g/mol

5.97 g Cu 1 mole
------------------ x ------------------ = 0.0939 moles Cu
63.546 g

User KiraMichiru
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