Lars observes a substance to be a solid and to float in water at room temperature (23°c). based on the given properties, which substance is the most likely identity of this sample? substance melting point (°c) boiling point (°c) density at room temperature (g/cm3) carbon tetrachloride -22.9 76.7 1.59 cetyl alcohol 49.3 344 0.811 dichlorobenzene 53.5 174 1.25 sulfur hexafluoride -64 -50.8 0.00617 a. carbon tetrachloride b. cetyl alcohol c. dichlorobenzene d. sulfur hexafluoride
Answers: 2
Chemistry, 22.06.2019 06:30
Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.
Answers: 1
Chemistry, 22.06.2019 18:00
What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j
Answers: 1
Chemistry, 23.06.2019 07:00
Select the correct answer. why are scientific models important in the study of science? a. they always involve critical mathematical calculations. b. they scientists understand complex ideas and objects that aren’t easy to handle. c. they enable scientists to popularize their work in society. d. they are required when conducting any peer review process. e. they are necessary for turning a hypothesis into a law.
Answers: 2
Lars observes a substance to be a solid and to float in water at room temperature (23°c). based on t...
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