Question

What is the molarity of the resultant MgCl2 solution formed by mixing 100 cm3 of 0.5 M MgCl2 solution and 150 cm3 of 0.9M MgCl2 solution?
moles soln 1 = M x L = ??
moles soln 2 = M x L = ??
M mixed(resultant) soln = total moles/total L.

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