A sample of substance X is found to be an element with the atomic number 13. Which atomic number below represents an element that shares similarities with
substance X?

A.3
B.5
C.22
D.33
(i think it’s b but i’m not sure)

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

Chemistry worksheet - i am not sure what they are asking for exactly?

How many moles are in 43.9 l of oxygen