dengan menggunakan tabel periodik tentukanlah Mr senyawa berikut : a.HNO3 b.NA2SO4.5H2O c.AL2SO4(3X) d.C6H12O6 e.CACO3 Mohon Bantuannya Kak

a. Dik : H = 1
N = 14
O = 16
Peny = Mr NHO3 = H + N + 3O
= 1+ 14 + 3 x 16
= 1 + 14 + 48
= 63

b. Dik : Na = 23 , S = 32, O = 16, H = 1
Peny :
Mr Na2SO4.5H2O = Na + 2S + 4O . 10H+ 5O
= 23 + 2(32) + 4(16) . 10(1) + 5(16)
= 23 + 64 + 64 . 10 + 80
= 151 . 90
= 13590

c. Dik : Al = 27, S = 32, O = 16
Peny :
Mr Al2SO4(3x) = 2Al + 3S + 12O
= 2(27) + 3(32) + 12(16)
= 54 + 96 + 192
= 342

d. Dik : C = 12, H = 1, O = 16
Peny :
Mr C6H12O6 = 6C + 12H + 6O
= 6(12) + 12(1) + 6(16)
= 72 + 12 + 96
= 180

e. Dik = Ca = 40, C = 12, O = 16
Peny : Mr CaCO3 = Ca + C + 3O
= 40 + 12 + 3(16)
= 40 + 12 + 48
= 100