Please help soon!! A chemist uses a calorimeter to determine the enthalpy of dissolving of a crystalline substance. She fills the calorimeter with 365 g of water. The water is at room temperature which is 20 C. She adds 92 grams of the solid and fastens the top. Once the materials has completely dissolves, she notes that the new temperature of the water is 9.3 C. Recall that the specific heat of water is 4.18 J/g °C. Using these data, calculate the enthalpy of dissolving (Hdissolving) of the solid in joules per gram (J/g). Work must be shown to earn credit.

the ratio of the conjugate base to the acid required to attain the desired ph.

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.

window cleaner is ammonia dissolved in water. this is an example of a