Sebanyak 50 gram suatu oksida logam MO mengandung 30 gr logam M. Jika Ar O=16, berapa Ar logam M
Axemore
Massa Oksida logam MO : 50 gram massa logam M : 30 gram Ar O : 16 g/mol Ar M : ..... g/mol ?
Jawab
MO → M + O 50 g...30 g ... 20 g
Gunakan rumus berikut : massa Unsur : (Ar Unsur / Mr senyawa) x massa senyawa
massa M : (Ar M / Mr MO) x massa MO 30 g : (Ar M / Ar M + 16 g/mol) x 50 g 30 g (Ar M + 16 g/mol) : Ar M x 50 g 30M + 480 g/mol : 50M (30 - 50)M : -480 g/mol -20M : -480 g/mol M : -480 g/mol / -20 Ar M : 24 g/mol
massa logam M : 30 gram
Ar O : 16 g/mol
Ar M : ..... g/mol ?
Jawab
MO → M + O
50 g...30 g ... 20 g
Gunakan rumus berikut :
massa Unsur : (Ar Unsur / Mr senyawa) x massa senyawa
massa M : (Ar M / Mr MO) x massa MO
30 g : (Ar M / Ar M + 16 g/mol) x 50 g
30 g (Ar M + 16 g/mol) : Ar M x 50 g
30M + 480 g/mol : 50M
(30 - 50)M : -480 g/mol
-20M : -480 g/mol
M : -480 g/mol / -20
Ar M : 24 g/mol
Jadi, Ar M adalah 24 g/mol
Semoga Terbantu
Keep Learning
@XeMore