Calculate the mass of 2,000,000,000,000,000,000,000,000 molecules of aspirin.

Aspirin has a chemical formula of C9H8O4. We can calculate its molar mass by accounting for all the atoms of different elements that are there. In other words,

Molar mass of aspirin = number of carbon atoms x atomic mass of carbon + number of hydrogen atoms x atomic mas of hydrogen + number of oxygen atoms x atomic mass of oxygen 

= 9 x 12 + 8 x 1 + 4 x 16 = 180 g.

A mole of a substance has an Avogadro's number of molecules, which is equal to 6.023 x 10^23 molecules.

In this case, we have 2,000,000,000,000,000,000,000,000 molecules or 2 x 10^24 molecules. 

Thus, the moles of aspirin are:

moles = number of molecules / Avogadro's number 

= 2 x 10^24 / (6.023 x 10^23) = 3.321 moles.

Since the molar mass is 180 g, the given number of molecules will be contained in

3.321 moles x 180 g/mole = 597.8 g.

Thus, 597.8 g of aspirin will contain the given number of molecules.

Hope this helps.