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I need help with these problems. 1. How many atoms are in 7.65 mol of Cu? 2. How many formula units of NaClO 4 are

I need help with these problems.

1. How many atoms are in 7.65 mol of Cu?

2. How many formula units of NaClO4 are in 500.0 g of NaClO4?

3. How many moles of lead(II) nitrate are in 50.0 g of lead(II) nitrate?

Thank you.

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