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1-Calculate the mass in grams of 2.55 moles of KCl 2- Calculate how many moles are...

1-Calculate the mass in grams of 2.55 moles of KCl

2- Calculate how many moles are in 2.00x1020 molecules of CO2

3- How many atoms of H are there in 1.00x1019 molecules of NH3

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