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When a sample of KCN of 6.00-grams is dissolved in H2O, water in a calorimeter (that has a total heat capacity of 2.156 kJ·K-1), the temperature decreases by 0.500 K. estimate the molar heat of solution of Potassium cyanide KCN.

An electron traveling at the velocity of 3.7 105 m/sec has an uncertainty in its velocity of 2.34 105 m/s. determine the uncertainty in its position?

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