What is the empirical formula of a compound containing 80% carbon and 20% hydrogen?

The simplest formula of a compound containing of element X and of element Y is

An organic compound contains 49.3% carbon, 6.84% hydrogen and its vapour density is 73. Molecular formula of compound is

A compound has the molecular formula C$_2$H$_4$O$_2$. What is its empirical formula?

An oxide of metal M contains 70% of the metal (atomic mass = 56u) and 30% oxygen (atomic mass = 16u). Determine the empirical formula of the metal oxide.

A compound has the empirical formula C2H4O. If its molecular mass is 88 g/mol, what is its molecular formula?

An organic compound having molecular mass 60 is found to contain C=20%, H=6.67% and N=46.67% while rest is oxygen. On heating it gives ${\rm{N}}{{\rm{H}}_3}$ along with a solid residue. The solid residue gives violet colour with alkaline copper sulphate solution. The compound is

A hydrocarbon contains 82% carbon by weight. If the atomic weight of carbon is 12 and hydrogen is 1, what is its empirical formula?

A mineral sample contains 27.27% of element X (atomic mass = 56 u) and 72.73% of element Y (atomic mass = 16 u). What is the empirical formula of the mineral?

Two organic compounds X and Y have the same empirical formula $CH_2O$. Compound X has a molar mass of 30 g/mol while compound Y has a molar mass of 90 g/mol. If 0.3 moles of X contains the same number of oxygen atoms as 'm' grams of Y, what is the value of 'm'?

An organic compound having molecular mass 60 is found to contain C=20%, H=6.67% and N=46.67% while rest is oxygen. On heating it gives ${\rm{N}}{{\rm{H}}_3}$ along with a solid residue. The solid residue gives violet colour with alkaline copper sulphate solution. The compound is