Chemistry, 16.07.2019 07:40 keatonjarvis
Which conclusion is best supported by julie’s observations? a. the liquid is a pure substance because it is colorless. b. the liquid is a mixture because its temperature rises. c. the liquid is a pure substance because it remains liquid when cold. d. the liquid is a mixture because it has a gas dissolved in a liquid.
Answers: 2
Chemistry, 21.06.2019 23:50
2points what is the job of a scientist? a. to answer ethical questions. b. to write laws based on his or her knowledge. c. to ask and answer scientific questions. d. to ignore facts that do not support his or her theory.
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Chemistry, 22.06.2019 00:00
Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.
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Chemistry, 22.06.2019 10:00
A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?
Answers: 1
Which conclusion is best supported by julie’s observations? a. the liquid is a pure substance becau...
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