how many equivalents are in 3.36g of Be?

Answer 1

If I understand your "equivalents" correctly, then your beryllium is involved in some kind of chemical reaction and that you also know the mass or mol of some other element/molecule. If I'm not mistaken, take the smallest mol amount of the other element/molecule and divide the mol of Be by that. For example, in the made-up reaction
Be + O2 --> BeO2
You would need to take the amount of mol of O2 you have (if you're given a mass of O2, convert to mol of O2) and divide the mol of Be you have by mol of O2, that would give you equivalents of Be. Equivalents is basically a way of comparing mol/mol in a reaction without having to say mol. If your question doesn't involve a reaction, I don't know what you're talking about then.

Answer 2

if you mean moles... then you take the g times the molar mass of Be...

so 1mol/9.01g Be X 3.36g =

you are left with mols as the g cancel out...

if this is not what you mean, please expand on "equivalents"

Answer 3

3.36(g)/9.012182(mol g-1)=0.3728mol