Use the perfodic table to fill in the table below. Element
Group Name
Charge
# of Valence
Electrons
# of Energy
Levels
One Element
with similar
Properties
Boron
Akaline Earth
Metals
Fluorine
1
5
Tin
Sulfur
Krypton
3
Arsenic
lodine
Potassium
5
Thallium

Aperfume bottle is dropped in the corner of a room. the odor of the perfume can be detected on the other side of the room. which statement best describes this observation?

How many moles of oxygen react with 12 moles of aluminum

Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.