PLEASE HELP 9. 26 g of an unknown solid is dissolved in a coffee cup calorimeter that contains 62. 0 mL of water.

The measured temperature increased from 23. 4 °C to 24. 7 °C. The specific heat of water is 4. 184Jg

10c-1 and assume the density of the solution is 1. 00 g mlº? Calculate the molecular weight of the

unknown solid if the AH was determined to be -2. 51 k) moll via another experiment.