How many liters of O 2 will be produced from 6.2 g of KClO 3 the following reaction?

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.

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?