1.

How many molecules are there in a 3.46 g sample of hydrogen chloride, HCl? Note:The number of molecules in a sample is related to moles of compound (1 mol HCl = 6.023 xx 10^(23) HCl molecules). Therefore if you first convert grams HCl to moles, then you can convert moles to number of molecules).

Answer»

SOLUTION :`3.46 g "HCl" xx (1 " mol HCl")/(36.5 g "HCl")xx (6.023 xx 10^(23)" HCl molecules")/(1 " mol HCl")`
`= 5.71 xx 10^(22)` HCl molecules


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