please answer all of the questions


1. There are ______ moles in 9.01 x 10^23 atoms.



none of the above



15



0.150



1.50


2. How many sulfur atoms are present in 41.8 moles of sulfur?


Question 2 options:


2.52 x 10^25 S atoms



6.94 x 10^29 S atoms



1.44 x 10^24 S atoms



4.18 x 10^25 S atoms


3.How many moles would 1.00 x 10^23 molecules of methane (CH4) represent?


Question 3 options:


1.66 moles



0.166 moles



0.0166 moles



none of the above


4.How many moles of iron (Fe) are in a sample of 7.91 x 10^23 atoms of iron?


Question 4 options:


1.31 mol Fe



0.761 mol Fe



7.91 mol Fe



47.6 mol Fe


5.How many oxygen atoms are present in 2.28 moles of nitric acid, HNO3?


Question 5 options:


7.39 x 10^23 O atoms



4.119 x 10^23 O atoms



4.12 x 10^24 O atoms



1.37 x 10^24 O atoms