5.02 Quiz Balancing Chemical Equations
Question: Which of the following equations is balanced?
Answer: 2Na + Cl2 —— 2NaCl
Question: Why must chemical equations be balanced?
Answer: to represent conservation of mass
Question: balanced equation for P + O2 ——- P2O5
Answer: 4P + 5O2 —— 2P2O5
Question: balanced equation for CA + O2 —— CaO
Answer: 2Ca + O2 —— 2CaO
Question: The equation 2NaNO3 + CaCl2 ——- Ca(NO3)2 is balanced. How many oxygen atoms are on each side?
Answer: 6