Practice question
Question
A 1.5 L sample of a gas at STP contains 0.75 g of carbon and 0.25 g of hydrogen. What is its molecular formula? (Atomic masses: C = 12, H = 1)
Explanation
Moles of gas ≈ 0.067 mol; total mass = 1 g. Molar mass ≈ 14.93 g/mol. Moles: C ≈ 0.0625, H = 0.25; per molecule: C ≈ 1, H ≈ 4. Molecular formula = CH₄.
Related blogs
Guides and insights connected to this topic
Plant Cell Structure and Organelles: Definition, Diagram, Functions
Learn what defines a plant cell, how it differs from an animal cell, and the structure and functions of its 14 major organelles with clear explanations and diagrams.
Animal Cell Structure, Diagram and Organelles – Definition, Types, Functions
Learn what defines an animal cell, its organelles, and how they differ from plant cells. Includes diagrams and clear explanations of cell structure and functions.
Coronavirus Structure, Genome, Replication, Symptoms, Pathogenesis, and Prevention
Structure of Coronavirus Coronaviruses (enveloped RNA viruses) fall in the virus family Coronaviridae, order Nidovirales. They are enveloped...