Assume that the enthalpy of fusion of ice is 6020 j/mol and does not vary appreciably over the temperature range 270–290 k. if 1.40 mol of ice at 0°c is melted by heat supplied from surroundings at 284 k, what is the entropy change in the surroundings in j/k

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

Astring vibrates with a frequency of 10 hz. why can't a person hear the sound waves produced by the vibrating string, no matter how large the amplitude of the waves? out! this is homework and due tomorrow! you so much!