Chemistry, 30.01.2020 18:58 ezrabailey100
Which of the following can only be separated into two or more pure substances by a chemical change?
a. an element
b. a compound
c. a homogeneous mixture
d. a heterogeneous mixture
Answers: 3
Chemistry, 22.06.2019 06:00
This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light
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Chemistry, 22.06.2019 08:30
What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots
Answers: 3
Chemistry, 22.06.2019 22:30
What is the work done by the electric force to move a 1 c charge from a to b?
Answers: 2
Which of the following can only be separated into two or more pure substances by a chemical change?...
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