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What is the molar mass of chloral hydrate and how many moles of C2H3Cl3O2 molecules are in 500 g chloral hydrate.

Also, what is the mass in grams of 2.0 x 10^-2 mol chloral hydrate?

Molar mass? You can add them up. Starting at the left, 2 carbons, three H, three Cl, two O. The atomic masses you are adding are in the periodic table.

Number moles= 500/molmass

Massingrams= molmass*(2.0*10^-2)

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