9. An atom has a mass number of 23 and atomic number 11. The numbers of 1 point protons are
O 11
O 12
O 23
о
44

This drawing shows a human body system. what is the primary function of this body system?

4al + 3o2 → 2al2o3 what does the "3" in front of o2 stand for? a) it indicates that there are 5 oxygen atoms after you add the coefficient and the subscript. b) it indicates that that there are are total of 6 oxygen atoms all bonded together as a single molecule. c) it indicates that there are 3 oxygen molecules chemically bonded to each other in the reaction. d) it indicates that there are 3 separate oxygen molecules in the reaction.

How do you calculate the mass of a product when the amounts of more than one reactant are given?