Question

There are 1.204 x 1024 molecules of H2 in a sample. How many moles does this represent?


2 moles

4 moles

10 moles

20 moles

Answer 1

There are 6.02 x 10^23 molecules in 1 mole of molecules. 1.204 x 10^24 is just 6.02 x 10^23 times 2, so thats 2 moles.