The molar mass hydrogen peroxide is 34.0 g, and its empirical formula is HO. What is the molecular formula for hydrogen peroxide?
A. HO
B. HO2
C. H2O
D. H2O2

Question

The molar mass hydrogen peroxide is 34.0 g, and its empirical formula is HO. What is the molecular formula for hydrogen peroxide? 
	A.	HO
	B.	HO2
	C.	H2O
	D.	H2O2

dumbsearch2 · Answer

also (if possible), could you help with this one?

Does the chemical formula H2O2 represent a molecule or a formula unit? 
	A.	Molecule
	B.	Formula unit

nechirwan · Answer

D.	H2O2

nechirwan · Answer

B.	Formula unit

dumbsearch2 · Answer

why formula unit and not molecule unit? @nechirwan

joannablackwelder · Answer

I think it is a molecule. Formula unis are smallest whole number ratios and thisone does not fitinto that category.

aaronq · Answer

i also think it's molecular. Formula units are used for ionic/metallic solids and molecular for covalent compounds. Hydrogen peroxide is a covalent compound.

dumbsearch2 · Answer

Thanks @aaronq and @joannablackwelder. :) I appreciate both of your points.