Some mole problems!

Question

Which quantity of neon may be represented by the symbol Ne?
A) 1 gram B) 4 liters C) 6 x 1023 atoms D) 2 moles

A sample of nitrogen containing 1.5 x 1023 molecules has the same number of molecules as a sample containing
A) 1.0 mole of H2 B) 0.25 mole of O2 C) 0.50 mole of Ne D) 2.0 moles of He

Please explain how you got the answer. Thankss!

Answer 1

1)Ne usually means 1 mole of Ne. How many atoms is that?
2) How many moles? remembering that 1 mole of molecules is 6.02E23 molecules.
1.5E23/6.02E23 = 0.25 moles.

Answer 2

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