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Solve question number 12
The sum of all real values of \(x\) satisfying the equation \(\left(x^{2}-5 x+5\right)^{x^{2}+4 x-80}=1\) is
(a) \(-4\)
(b) 6
(c) 5
(d) 3
Updated Mon, 20 May 2019 02:14 pm

A solution of sodium sulfate contains \(92 \text {g of } \mathrm{Na}^{+}\) ions per kilogram of water. The molality of \(\mathrm{Na}^{+}\) ions in that solution in mol \(kg^{-1}\) is :
(a) 16
(b) 8
(c) 4
(d) 12
Updated Thu, 16 May 2019 11:37 am