3_2 SRQs ANSWERS
1. During a chemical reaction, matter is neither created nor destroyed;
the mass of reactants always equals the mass of the products.
2. 2Na + Cl2 --> 2NaCl
3. No; one oxygen atom is on the left side of the arrow, and two are on
the right side.
4. Mass in the system as a whole did not increase. This indicates that
the mass of the product had to come from within the system,
presumably from the air within the jar.
5. It was released into the air as a gas because it was not collected
during the reaction.
6. 1000 water molecules; yes; 500 O2 molecules