1. Hitunglah massa molekul relatif (Mr) senyawa berikut. a. Na2CO3 b. H2SO4 c. C6H12O6 d. CaCO3 e. NaCl 2. Berapa massa 1 atom magnesium jika diketahui ArMg=23,

1. a. Na2CO3
Mr = 23×2+12+16×3 = 106

b. H2SO4
Mr = 1×2+32+16×4 = 98

c. C6H12O6
Mr = 12×6+12+16×6 = 180

d. CaCO3
Mr 40+12+16×3 = 100

e. NaCl
Mr 23+35,5 = 58.5

2. Mg = 24

1.66 × 10^24 / 6.02 × 10²³
= 2,7mol
Massa = 0.7×24 = 16.8gram


nomor 2 saya kurang yakin
maaf kalau salah