Question

quantos mols existem em 5g de calcio Ca=40g/mol

Answer 1

40g------1 mol
5g -------x
5=40x
x=5/40
x= 0.125 mol

Answer 2

40g               1 mol

5g                  x

40x=5

x =   5  
        40


x=0,125 mol



Bons estudos!