C4h10
4: 1-bromobutane 2-bromobutane 1-bromo-2-methylpropane 2-bromo-2-methylpropane
More correct KCl is the formula unit of potassium chloride.
Only two isomers are possible 1,Butane and 2, 2-methyl propane. Not quite: "butane" has no need for a number and the second compound should be simply "2-methylpropane" or even more simply "methylpropane" since there is only one possible structure for it.
C8h8
CCl4 is molecular formula.
4: 1-bromobutane 2-bromobutane 1-bromo-2-methylpropane 2-bromo-2-methylpropane
The correct molecular formula for styrene isC6H5CH=CH2
Ch3ch3cclch3
If you think to methyl isocyanate the chemical formula is C2H3NO.
Both of these compounds are alkanes with four carbon atoms and both of these compounds have the molecular formula C4H10. These are structural isomers of each other.
More correct KCl is the formula unit of potassium chloride.
IF5
PF5
Only two isomers are possible 1,Butane and 2, 2-methyl propane. Not quite: "butane" has no need for a number and the second compound should be simply "2-methylpropane" or even more simply "methylpropane" since there is only one possible structure for it.
C8h8
For ionic compounds the correct term is formula unit, not molecule.
CH4 has the same molecular and empirical formulas.