God, please help. I don't understand this and it was due 20 minutes ago. Serious answers only.
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Which statement describes evidence of a chemical reaction? a) ice melting eliminate b) water boiling c) lighting a match d) grape juice freezing

What are the primary responsibilities of a chemical engineer involved in "r& d"? develop large scale manufacturing operations discover new products and processes training of new chemists determine products needed by consumers

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy