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Avariable that is not being directly tested during an experiment should be changed varied experimented controlled
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Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.
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Ethyl alcohols formula is C2H50H, what is this?
a. A element
b. A compound
c. A mi...
a. A element
b. A compound
c. A mi...
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