Chemistry, 29.09.2020 15:01, unknown9263
A student wants to examine a substance without altering its composition. Which of the following describes a property of the substance that the student should examine?
Toxicity, because it can be observed by altering the state of the substance
Boiling point, because it can be observed by altering the state of the substance
Toxicity, because it can be observed by replacing the atoms of the substance with new atoms
Boiling point, because it can be observed by replacing the atoms of the substance with new atoms
Answers: 2
Chemistry, 21.06.2019 23:50, ShlomoShekelstein
Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.
Answers: 1
Chemistry, 22.06.2019 12:00, sophiaa23
Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.
Answers: 2
A student wants to examine a substance without altering its composition. Which of the following desc...
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