tolong bantu jawab ya pake cara, makasih

1. M = g/Mr x 1000/ml
    M = 0,585/58,5 x 1000/100 = 0,1
2. M = g/Mr x 1000/ml
    0,5 = 9/40 x 1000/150
    g = 0,5x40x150/1000
    g = 3,00
3. M = Massa Jenis x 10 x %/Mr
    M = 1.4 x 10 x35/100 ÷ 180
    M = 1,4 x 35/100 ÷ 180
    M = 2,7
4. M1 x V1 = M2 x V2
    0,05 x 2 = {1,25.10.8%/40} x ?
    ? = 0,10/0,025
    ? = 4 Liter