Tentukan banyaknya mol zat(Ca=40;C=12;H=1;O=16) a.80 gram Ca b.90 gram C6H12O6

Materi : Stoikiometri
Kelas : X SMA

a. mol = gram / mr = 80 / 40 = 2 mol
b. mol = gram / mr = 90 / 6.12 + 12.1 + 6.16 = 90 / 180 = 1/2 = 0,5 mol

a. mol = gram/massa molar
= 80 gram/ (40 gram/mol)
= 2 mol

b. mol = gram/massa molar
= 90 gram /{ ( 12 x 6) + ( 1 x 12) + (16 x 6)} gram /mol
= 90 gram / ( 72+12+96) gram/mol
= 90 gram / (180 gram /mol)
= 0.5 mol