I need to know if i correct (Chemistry)

[omni]

if is known that for some Compound have Empirical formula CH2 and molar mass of 56 g/mol

so the Molecular formula of this Compound will be C4H8 ?


and other Question that i need to know if i correct is: the Oxidation number of KMnO4 is +7 ?

thanks.

 

[Borek]

so the Molecular formula of this Compound will be C4H8 ?

Yes.

is: the Oxidation number of KMnO4 is +7 ?

Oxidation number is a property of atom, not a molecule. But I guess it is just a lousy wording and you are on the right track.

 

[omni]

hi. thank you for yours answer
about KMnO4 i got 4 Different Options and this was my Options :

A)+7
B)+2
C)+3
D)+4
so found is A what do you say?
and thanks again.

 

[Borek]

You still don't understand. There is no such thing as oxidation number of KMnO₄. But K in KMnO₄ has oxidation number of +1. O in KMnO₄ has oxidation number of -2. And so on.

 

[chemisttree]

The question probably asked for the oxidation number for manganese in the compound KMnO4.

 

[omni]

yes yes exactly as chemisttree told is asked about manganese in the compound KMnO4 so the answer still the same?

and sorry about the Bad wording.
thanks.

 

[Borek]

yes yes exactly as chemisttree told is asked about manganese in the compound

I hoped you will get in on your own.

+7 it is.