How many valence electrons does a fluorine atom contain?
a. 2
b. 5
c. 7
d. 9

Note the ph and poh values labeled with letters on the ph scale below. based on log rules and the way ph is calculated, what is the difference in [oh– ] concentration between point a and point b. a) 10^1 b) 10^5 c) 10^6 d) 10^7

What does earth’s rotation on its axis cause? the tides night and day passing of years phases of the moon

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.