1. Calculate the amount of heat, in kJ, that is transferred to 45.7 mL of water when its temperature changes from 23.6 °C to 41.3 °C. The density of water is 1.00 g/mL and the specific heat of water is 4.184 J/(g•°C). 2. Should the sign of the heat transferred in the question above be positive or negative?

Why did southern business leaders want to increase the number of slaves

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms