Which sample contains the most particles. How do you know this?
1) 1.53
2) 1.40
3) 1.89

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it

Which sample at stp has the same number of atoms as 18 liters of ne at stp

Identify the lewis base in this balanced equation: fe3+ h2o fe(h2o)63+