How many grams are there in a container of 2.26x1025 molecules of dinitrogen trisufide?

Answer 1

In order to answer this question you need to know the molar mass of dinitrogen trisulfide (N2S3), and that 1 mole of molecules is equal to 6.022 x 1023 molecules. Molar mass is determined by multiplying each element's subscript by that element's atomic weight on the Periodic Table, and expressing it in grams/mole.

1 mole N2S3 molecules = 6.022 x 1023 molecules N2S3

molar mass N2S3 = 124.208g/mol

Convert molecules to moles.

2.26 x 1025 molecules N2S3 x (1mol N2S3/6.022 x 1023 molecules N2S3) = 37.5 moles N2S3

Convert moles to mass in grams.

37.5mol N2S3 x (124.208g N2S3/1mol N2S3) = *4660 grams N2S3

*The answer is rounded to three significant figures.