Conversion with Moles!?

1. Convert 2.56 moles N20 to molecules


2. Convert 3.0 x 10^24 molecules H20 to moles H20


3. Calculate the mass of 4.52 mol silver.


4. Calculate the number of moles of CH4 in 84g CH4.





Any help is greatly appreciated, and please explain.

Conversion with Moles!?
1 mole ==%26gt; 6.02 x 10^23





1.


2.56 x 6.02x10^23 = 1.54 x 10^24





2.


3.0 x 10^24 / 6.02 x 10^23 = 4.98





3.


Atomic weight = 107.870 g/mol


4.52 mol x 107.870 g/mol = 487.6 g





4.


Molar mass = 16 g/mol


84 g / 16 g/mol = 5.25 mol

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