How many moles of ammonia contain each of the following number of molecules?

Note: Reference the Fundamental constants table for additional information.

Part 1 of 3
Be sure your answer has the correct number of significant figures.

1.83x10^25 molecules= round answer to the correct significant figure
3.02x10^22 molecules
1.8x10^24 molecules=

1.83x10^25 molecules of ammonia contain 30 moles (rounded to two significant figures)

3.02x10^22 molecules of ammonia contain 0.5 moles
1.8x10^24 molecules of ammonia contain 30 moles