tolong dong soal abcd

klo gk salah ya :D
a) mol = gr C/ar C
= 1,204x10^23/12
= 0.1x10^23
= 1x10^22 mol
#ar C = 12
b) mol = gr H2O/mr H2O
= 1,505x10^22/18
= 0,08x10^22
= 8x10^20 mol
#mr H2O = ( ar H x 2) +( ar O x 1)
= (1x2) + (16x1) = 18
c) mol = gr Mg/ar Mg
= 3,01x10^23/24.3
= 0,12x10^23
= 12x10^21 mol
#ar Mg = 24.3
d) ku gk tau rumus senyawanya. ntah AlCl atau AlCl3

*MAAF KALO SALAH YA :D