Under what circumstances will a scientific theory be changed or discarded? A. New experimental evidence is not compatible with t
2 answers:
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Answer: 3 Changes can occur to physical properties of a substance, but the chemical composition of the substance remains the same
Explanation:
Physical change mainly physical properties of a substance while the chemical changes remain unchanged. Once there is a change to the chemistry of the substance, this would be classified as a chemical change.
Answer:
1.96g H2
Explanation:
P4 = 123.9g/mol
H2 = 2.02g/mol
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*
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= 1.96g H2