Aconcentrated phosphoric acid solution is 85.5% h3po4 by mass and has a density of 1.69 g/ml at 25°c. what is the molarity of h3po4? what is the mole fraction of urea, co(nh2)2, in a solution prepared by dissolving 5.6 g of urea in 30.1 g of methanol, ch3oh? how will an understanding of this concept you in your healthcare career?

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign