Question

calculate the mass of the following substances. a) mass of 4 moles of aluminium atoms b) mass of 0.5 mole of N2 gas c) mass of molees of sodium sulphate

Answer 1

a- 4=m/molrmss of alu..
b- 0.5=m/ molrmass of n2
ç- sod sulph.=Na2SO4

how many moles? of na2so4