Calculate the mass in grams of 3.94×1024 molecules of formaldehyde. the chemical formula for formaldehyde is ch2o.

Mass in grams of formaldehyde = 196.51 g

Explanation:

No. of molecules of formaldehyde =

Moles is related with number of molecules as:

Avogadro's no. =

moles of formaldehyde

Molar mass of formaldehyde = 30.03 g/mol

Molar mass is related with mass as:

Mass = Moles × Molar mass

        = 6.544 × 30.03

       = 196.51 g

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