Jawabanmu

2013-12-24T11:07:48+07:00
M=g/mr * 1000/v
 1 = g/40 * 1000/100
 1 = g/40 * 10
40= 10 G
G= 4 gram
2013-12-24T14:12:59+07:00
M =?
n = \frac{m}{Mr}
m = Mr. n
n = M.V
V = 100 ml => 0,1 L
n =  0,1x1
n= 0,1
m = 40. 0,1
m = 4 gram