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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
If the angle is measured in c.w.direction then why are the measurement of the angle is in negative and start with the IV quadrant ? Why are the rules of measurement of angles of a.c.w direction is not applicable for this ? Sir please explain by giving some examples. Sir please look at the figure given below and check the formula for tan(\(-\theta \)) and cot(\(-\theta \)) is right or not??
Updated Thu, 16 May 2019 10:04 am