How many molecules of As2O7 are present in 48.9 grams of As2O7?

Question

Help?????? Please????? Thanks!!!!

Answer 1

Hello, Sophia,

I just answered a similar question concerning tin ions. Please use that one to guide yiu through this nearly identical problem. This one is a little easier. Find the molar mass of As₂O_7. Then divide 48.9 grams by the molar mass (g/mole) to find the number of moles.

Multiply the number of moles times Avogadro's number, 6.02x10²³ molecules/mole to find the number of molecules.

Bob