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Flashcards by Deleted user, updated more than 1 year ago
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Created by Farha Idrees
about 8 years ago
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Copied by Farha Idrees
almost 7 years ago
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| Question | Answer |
| What happens to the atoms in a chemical reaction? | No new atoms are created or destroyed, but simply rearranged in a chemical reaction |
| mass of reactants = mass of ______ | mass of reactants = mass of products ***This is called the Law of conservation of mass |
| Why does it seem as if this law has been broken in reactions involving gases and open containers | this is because mass may have been lost when the gas formed has escaped into the air OR the gas may have reacted with the oxygen in the air, formng an oxide and an increase in mass |
| Write the state symbols for each state: a. solid b. liquid c. gas d. aqueous solutions | a. (s) b. (l) c. (g) d. (aq) |
| Balance this equation: Cu + O² = CuO | Cu + O² = CuO ↓ Cu + O² = 2CuO ↓ 2Cu + O² = 2CuO |
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