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2014-05-23T14:05:41+07:00
Mr CO(NH₂)₂ = 60
n = m/mr = 15/60 = 0,25 mol
V= m.n = 500 ml = 0,5 L
M= n/v  0,25/0,5= 0,5 M
1 5 1
2014-05-23T18:31:22+07:00
Diketahui : g = 15 gr
Mr = 60
V = 500 mL
ditanya : molaritas larutan?
jawab :
M =  \frac{gr}{Mr}  ×  \frac{1000}{V}
M =  \frac{15}{60} ×  \frac{1000}{500}
M =  \frac{1}{4} × 2
M = 0,5 M