How many of the following compounds below are soluble in water? Answer by using an integer (e.g. 0, 1, etc).
a) Rb₂CO₃
b) CaSO₄
c) AgBr
d) BaCl₂
e) Ag₂SO₄
f) Ba₃(PO₄)₂
g) SrS
h) (NH₄)₃PO₄
i) Na₂CO₃
j) NH₄CH₃COO