If 5.0 liters of carbon dioxide gas are produced by the reaction below at stp, how many liters of oxygen gas were used in the reaction?
2co (g) + o2 (g) yields 2co2 (g)
10.0 l
7.5 l
5.0 l
2.5 l

As you move from right to left on the periodic table the atomic radius fill in the blank

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.