1. How many mole of water is present in an 18g of water?
2. How many mole of Na(sodium) are in 42 g of Na?
3. How many atoms are present in 36 g of Bromine?
4. How many molecules are there in 52 g of CO?
5. If you have 34.5 g of NaCl, how many moles of NaCl do you have?
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