Answer:
There are 3,5 x 10 e 23 molecules in 0.54 moles of NaBr.
Explanation:
We use Avogadro's number, according to which in 1 mole of any substance there are 6,023 x 10 e23 particles (example: atoms, molecules). We calculate the number of molecules according to the following simple three rule:
1 mol NaBr-------6,023 x 10 e23 molecules
0,54mol NaBr----x= (0,54mol NaBr x 6,023 x 10 e23 molecules)/1 mol NaBr
x=3,5 x 10 e 23 molecules
