Chemistry, 04.07.2019 23:30 gracie18383
Josh is doing an experiment with water. he starts with a plastic cup of water that has a mass of 12 grams. he places the cup in a sealed container and puts it in the freezer overnight. when he takes the container out of the freezer, he notices that the cup has cracked on its sides and the water is now frozen solid. which sentence best describes what josh discovers about the cup of frozen water? a) the mass of the cup of frozen water is 12 grams which means the mass did not change. b) the mass of the cup of frozen water is greater than 12 grams because it changed to a solid. c) the mass of the cup of frozen water is less than 12 grams because the frozen water is lighter than liquid water. d) the mass of the cup of frozen water is greater than 12 grams because the water expanded in the cup when it froze.
Answers: 2
Chemistry, 22.06.2019 12:40
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
Answers: 2
Chemistry, 22.06.2019 21:20
40dm3 of gas at 760 torr are heated from 5°c to 50°c what is the new volume
Answers: 3
Josh is doing an experiment with water. he starts with a plastic cup of water that has a mass of 12...
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