1. berpakan molalitas 70% alkohol C2H5OH jika (mr : 46)

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2. hitunglah molal larutan urea 15% (mr : 60)

1. berpakan molalitas 70% alkohol C2H5OH jika (mr : 46)

Jawaban Terkonfirmasi

1. molal alkohol = gr/mr x 1000/p
= 70/46 x 1000/30
= 50,72

2. molal urea = gr/mr x 1000/p
= 15/60 x 1000/40
=6,25

1. gr alkohol = 70 , gr air = 30
m = gr alkohol / mr x 1000/ gr air