Question

Calculate the number of moles (1)3.011* 10 power 23 atom of C (2) 9g of water

Answer 1

See solution in the attachment:

Answer 2

Number of moles in 3.011*10^23 atoms of carbon = 3.011*10^23/6.022*10^23 = 0.5 moles

Number of moles in 9g of water = 9/18 = 0.5 moles