What is the pressure of 4 moles of helium in a 50 L tank at 308 K? Use PV = nRT.
O A. 0.51 atm
O B. 24.64 atm
O C. 2.02 atm
OD. 0.13 atm

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