1.2: Chemical Equations

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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	Created by Farha Idrees over 7 years ago

	Copied by Farha Idrees about 6 years ago