Answer the questions about the following reaction.

4Al(s) + 3O2(g) 2Al2O3 (s)

How many molecules of O2 are used in the reaction?

How many oxygen atoms are required?

How many moles of Al2O3 are formed?

What is the mole ratio of Al to O2?

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

lol for the pointsss