Chemistry, 22.02.2021 03:20 jamesnoro

1. How many atoms are in 2.15 moles of water? 2. How many atoms of copper are in 12.0 grams?
3. How many moles of NH3 contain 1.75 x 10^24 molecules of?
4. Determine the number of molecules in 16.75 g of H2O ?
5. Find the formula for a hydrate with 48.8% MgSO4 & 51.2% H2O
6. What is the % by mass of C in Pb(C2H3O2)2?
(Questions with stars just don't make sense to me.)

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