If there are 5.22*10^19 molecules of H2SO3, determine the number of oxygen atoms present?

Could someone help me with this? I know I have to use Avogadros number, but I dont know how to set up the problem.

b. Determine the mass, in grams, of 5.22*10^19 molecules of H2SO3

Could someone walk me through this as well? I appreciate the help, thanks
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