You have 40g of MgCl2. How many atoms of Cl are in the sample?

1 Answer
Junaid Mirza
Mar 4, 2018

#5.07 × 10^23#

Explanation:

Molar mass of #"MgCl"_2 = "95 g/mol"#

Moles of #"MgCl"_2# in given sample #= "40 g"/"95 g/mol" = "0.421 mol"#

Moles of #"Cl"# atoms in given sample #= 2 × "0.421 mol" = "0.842 mol"#

Number of #"Cl"# atoms #= 0.842 cancel"mol" × (6.022 × 10^23)/cancel"mol" = 5.07 × 10^23#

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