Atoms of the same element that have different numbers of neutrons are classified as

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

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

Astudent conducts an experiment to determine how the amount of water given to a plant affects its growth. what is the independent variable for this experiment?