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m = 5 gram
v = 250 ml = 250.10⁻³ L
Ditanyakan : konsentrasi ?
Penyelesaian :
konsentrasi = m / v
konsentrasi = 5/250 .10⁻³ = 20 g/L
volume air:250ml
dit:k=.....
jawab:250ml:5g=50g/l