Chemistry, 05.08.2019 17:10 michaelwthms
A3.00-kg block of copper at 23.0°c is dropped into a large vessel of liquid nitrogen at 77.3 k. how many kilograms of nitrogen boil away by the time the copper reaches 77.3 k? (the specific heat of copper is 0.092 0 cal/g · °c, and the latent heat of vaporization of nitrogen is 48.0 cal/g.)
Answers: 2
Chemistry, 21.06.2019 17:00
An aqueous solution of hydroiodic acid is standardized by titration with a 0.186 m solution of calcium hydroxide. if 26.5 ml of base are required to neutralize 20.3 ml of the acid, what is the molarity of the hydroiodic acid solution? m hydroiodic acid
Answers: 1
Chemistry, 22.06.2019 07:30
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
Answers: 1
Chemistry, 22.06.2019 19:50
If a gas has an initial pressure of 101kpa and a volume of 10l, then it expands to a volume of 20l, what is the new pressure?
Answers: 2
A3.00-kg block of copper at 23.0°c is dropped into a large vessel of liquid nitrogen at 77.3 k. how...
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