A student has a Petri dish and several marbles. Which of the following activities should the student perform to demonstrate phase transition from a liquid to a solid?
A. Placing a few marbles in the Petri dish and shaking them vigorously to represent removal of energy
B. Packing the Petri dish with two layers of marbles and slowly jiggling them to represent removal of energy
C. Packing the Petri dish with two layers of marbles and slowly jiggling them to represent addition of energy
D. Placing a few marbles in the Petri dish and shaking them vigorously to represent addition of energy
Answers: 2
Chemistry, 22.06.2019 02:00, hemolelekeakua
The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?
Answers: 3
Chemistry, 22.06.2019 12:00, angtrevv
In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?
Answers: 1
A student has a Petri dish and several marbles. Which of the following activities should the student...
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