Chemistry

Chemistry, 15.10.2019 04:30, brid695

Explain how will you know the mass of the water in your experiment?

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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.

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Geography, 30.07.2019 01:00, beepbeep123

Josie observed that when water is boiled in an open beaker it completely disappears, leaving the beaker dry. what can josie conclude? a) mass is created in this experiment. b) mass is destroyed in this experiment. c) the mass of water is equal to the mass of water vapor produced. d) for the mass of water to be conserved during boiling, the beaker must be closed.

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Biology, 02.08.2019 05:30, Joejoe1813

Josie observed that when water is boiled in an open beaker it completely disappears, leaving the beaker dry. what can josie conclude? a) mass is created in this experiment. b) mass is destroyed in this experiment. c) the mass of water is equal to the mass of water vapor produced. d) for the mass of water to be conserved during boiling, the beaker must be closed.

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Physics, 29.10.2019 19:31, mkn3347

Astudent wished to add a new experiment to chapter 2 by investigating whether the mass of water changes when it is heated. the mass of a beaker containing a sample of water at 20°c was 109.44 g. after heating the sample to 60°c, the com- bined mass of the beaker and water was 109.08 g. do these results contradict the law of conservation of mass? explain your reasoning.

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