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A sample of CaCl2•2 H2O (calcium chloride dihydrate) contains 3.46x1021 atoms of chlorine. What is the...

A sample of CaCl2•2 H2O (calcium chloride dihydrate) contains 3.46x1021 atoms of chlorine. What is the mass of this sample in mg? Enter your mass ROUNDED to 3 significant figures. Do not enter the mg units. (written work)

Expert Solution

Molecular weight of is 147.01 g/mol.

1 mol of contain 2 mol of Cl atoms = no. of atoms.

If contain atoms of chlorine then there will be no. of atoms.

atoms are there in 1 mol of

then atoms are there in mol of

mol of =

So the mass of sample is 422 mg.

422

queen_honey_blossom answered 2 years ago

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