(jumlah massa atom dalam suatu zat) tulis caranya ya :) tentukan Mr dari: a)Al(OH)3 B) CuSO45H2O
niaselian99
A. Al(OH)3 ---->> (1 x Ar Al) + (3 x Ar O) + (3 x Ar H) ---->> (1 x 27) + (3 x 16) + (3 x 1) = 27 + 48 + 3 = 78 b. CuSO4.5H2O ---->> (1 x Ar Cu) + (1 x Ar S) + (4 x Ar O) + {5 (2 x Ar H) + (1 x Ar O) } ---->> (1 x 64) + (1 x 32) + (4 x 16) + {5 (2 x 1 ) + (1 x 16) } = 64 + 32 + 64 + 90 = 250
---->> (1 x Ar Al) + (3 x Ar O) + (3 x Ar H)
---->> (1 x 27) + (3 x 16) + (3 x 1) = 27 + 48 + 3 = 78
b. CuSO4.5H2O
---->> (1 x Ar Cu) + (1 x Ar S) + (4 x Ar O) + {5 (2 x Ar H) + (1 x Ar O) }
---->> (1 x 64) + (1 x 32) + (4 x 16) + {5 (2 x 1 ) + (1 x 16) }
= 64 + 32 + 64 + 90 = 250