PLEASE HELP THIS IS TIMEDHow can the number of atoms of an individual element be determined by using a chemical formula? a. Dividing the atomic mass by number of atoms
b. Using the subscript after each element
C. Multiplying the number of atoms by their masses
d. Adding all of the subscripts together after the reaction is complete.

14. complete and balance the equations for the single displacement reactions. a. zn + pb(no3)2 -> b. al + niso4 -> 15. complete and balance the equations for the double displacement reactions. a. agno3(aq) + nacl(aq) -> b. mg(no3)2(aq) + koh(aq) -> 16. complete and balance the equations for the combustion reactions. a. __ ch4 + o2 -> b. __ c3h6 + o2 -> c. + o2 ->

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange