Question

Calculati compozitiaprocentuala pentru oxidul de magneziu

Answer 1

oxidul de magneziu: MgO
masa molara=40 g/mol

40g MgO...24 g Mg...16 g O
100 g MgO...x g Mg...y g O

x=60% Mg
y=40% O

Answer 2

M MgO = A Mg + A O =24+16=40 g
40 g MgO....... 24g Mg........ 16 g O
100 g MgO....... x g Mg........y g I
40/100=24/x=>x=100×24/40=60 % Mg
40/100 =16/y=>y=100×16/40=40 % O