A4.86-gram sample of calcium reacted completely with oxygen to form 6.80 grams of calcium oxide. this reaction is represented by the balanced equation below.
2ca(s) + o2(g) ==> 2cao(s)
54 determine the total mass of oxygen that reacted.

Timed ! in which of these statements are protons, electrons, and neutrons correctly compared? quarks are present in protons and neutrons but not in electrons. quarks are present in protons, neutrons, and electrons. quarks are present in neutrons and electrons but not in protons. quarks are present in protons and electrons but not in neutrons.