Calculate the mass in grams of 2.90×1024 molecules of formaldehyde. The chemical formula for formaldehyde is CH2O.

Adozen is 1221/12 = 1.751.75 x 12 = 21therefore, 1.75 is the answer.

D. is the answer hope that you

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.