Which element has the highest first ionization energy? a. phosphorus
b. aluminum
c. sodium
d. calcium

One of the reactions in a blast furnace used to reduce iron is shown above. how many grams of fe2o3 are required to produce 15.5 g of fe if the reaction occurs in the presence of excess co? a.11.1 g b.22.1 g c.30.0 g d.44.2 g

If soap hits the floor, is the soap dirty or the floor

What effect might melting sea ice have for people who live in coastal areas?