Question 1
All of the following elements are nonmetals except
◦ nitrogen.
◦ krypton.
◦ copper.
◦ phosphorus.
Question 2
Methane and oxygen react to form carbon dioxide and water. What mass of water is formed if 6.4 g of methane reacts with 25.6 g of oxygen to produce 17.6 g of carbon dioxide?
◦ 17.6 g
◦ 32.0 g
◦ 14.4 g
◦ 29.6 g