Some of the formulas could be either molecular or empirical formulas; however, some can only be molecular formulas. Which of the formulas must be molecular formulas?
PO
C2H4O2
H2O2
C3H4O3
NO2

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?