Which statement is not true about elements in group 16?

a. they need two electrons to complete their octet.
b. they have an oxidation number of 2-
c. they have an oxidation number of 2+
d. the have six valence electrons.

Given the following reaction: c3h8+5o2=3co2+4h20 how many grams of co2 will be produced 7 g of c3h8 and 98 g of o2

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

What information does a complete ionic equation give that the balanced equation doesn’t show?