Compare 1 mole of h2, 1 mole of o2, and 1 mole of f2. (a) which has the largest number of molecules? explain why. (b) which has the greatest mass? explain why.

a)

Number of molecules in 1 mole

Explanation:

a) Whether we take any of the substance among all three of the given substances they will have the same number of molecules in 1 mole of the substance is considered and the value for this will be

b)  

In the given question mass of the substance which is greatest is asked for one mole and we also know that mass of one mole is given by molar mass.  

Explanation:

b) It is known that is the molar mass for oxygen which is greater than that of hydrogen while fluorine has a molar mass of which on comparison shows that, it is the highest amongst all three.