Which of the following could provide definitive evidence of a chemical reaction? Choose two correct answers.
A. Liquid water has frozen to form ice.
B. A new substance, oxygen gas, has formed.
C. A new substance, rust, has formed.
D. A solid has dissolved in a liquid.
B. A new substance, oxygen gas, has formed.
C. A new substance, rust, has formed.
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Which of the following could provide definitive evidence of a chemical reaction? Choose two correct answers.(1 point)
The correct answers are:
B. A new substance, oxygen gas, has formed.
C. A new substance, rust, has formed.