What is the empirical formula of a compound containing 40.00% carbon, 6.67% hydrogen, and 53.33% oxygen by mass?

Which separation technique is used to separate different pigments in a mixture based on their affinity for a stationary phase and a mobile phase?

What is the common name for ethanoic acid?

What type of reaction is involved in the formation of alkanols from alkenes?

What is the mass percentage of carbon (C) in methane (CH4)? (The molar mass of carbon is approximately 12 g/mol.)