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Calculating mass of salt in original mixture

Assignment:

You are given 10.0 grams of a mixture of NaNO₃ and KF. You dissolve this mixture in 100.0 grams of water, and the temperature rises by 1.02°C. Calculate the mass of each salt in the original mixture. Assume that the specific heat of the solution is 4.18 J/g°C.

Useful information: Enthalpy of solution of NaNO₃: +20.5 kJ/mol

Enthalpy of solution of KF: -17.7 kJ/mol

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