If 30.0 grams of calcium metal react with 18.0 grams of oxygen gas, your calculations show that grams of CaO could be produced from the 30.0 grams of calcium and grams of CaO could be produced from the 18.0 grams of oxygen. The theoretical yield of calcium oxide from this reaction is .

What problem would a person have if the nucleic acid in one of his or her cells were damaged?

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

What layer of the atmosphere is directly above the troposphere?