9) What mass of oxygen is formed when 735 g of potassium chlorate
decomposes?
2 KCIO3 + 2 KCI + 3 O2
(3)
10)
What mass of hydrogen is produced when 195 mg of potassium is added to
water?
2 K + 2 H2O → 2 KOH + H2
(3)
11)
How much calcium oxide is produced by heating 50 g of calcium carbonate?
CaCO3 + CaO + CO2
(3)
12)
What mass of magnesium oxide is formed when 6 g of magnesium reacts with
oxygen?
2 Mg + O2 + 2 Mgo
(3)

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al oxidizing agent = reducing agent =

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

This statement about matter and its behavior is best classified as a