https://phychemstudio.com/blog daily 0.75 2025-10-22 https://phychemstudio.com/blog/how-good-is-your-mole-concept monthly 0.5 2023-05-01 https://images.squarespace-cdn.com/content/v1/632d4f5c191fe857b7ff1ed4/e5727341-9126-410b-a695-fc0f1370eaee/Screenshot+2023-05-01+215655.jpg Blog - How good is your mole concept? - Make it stand out Drawing diagrams will help you simplify the question. Let the molecular formula of the hydrocarbon be CxHy. CxHy reacts completely with excess oxygen gas to produce carbon dioxide gas and water. Water vapour will be cooled and condensed to a liquid at room temperature, so it will not be part of the gaseous mixture. Hence, the volume of gas remained after the complete combustion reaction consists of carbon dioxide gas and the excess unreacted oxygen gas. As the excess oxygen gas was 30 cm3, the volume of carbon dioxide gas produced was 50 - 30 = 20 cm3, which reacted with sodium hydroxide solution as it is an acidic oxide. The volume of oxygen gas reacted was 60 - 30 = 30 cm3. Avogadro's Law states that the volume of a gas is directly proportional to the number of moles of gas at constant temperature and pressure. We can derive a chemical equation based on the volumes of gases involved in the combustion reaction as follows. https://images.squarespace-cdn.com/content/v1/632d4f5c191fe857b7ff1ed4/3bb42324-56c1-435f-83d5-cfa73c8cd171/Screenshot+2023-05-01+222821.jpg Blog - How good is your mole concept? - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://phychemstudio.com/blog/the-importance-of-writing-chemical-equations-for-chemistry-students monthly 0.5 2023-05-01 https://images.squarespace-cdn.com/content/v1/632d4f5c191fe857b7ff1ed4/1682070035071-W93JZ91IRY8F260M1TH8/unsplash-image-_whop2XD0Mk.jpg Blog - The importance of writing chemical equations for chemistry students - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/632d4f5c191fe857b7ff1ed4/1682070961206-XUXA6TQPIKKZYKKKO7Z5/unsplash-image-xG8IQMqMITM.jpg Blog - The importance of writing chemical equations for chemistry students - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://phychemstudio.com/blog/useful-websites monthly 0.5 2023-03-01 https://phychemstudio.com/blog/closed-book-practice-test-yourself monthly 0.5 2023-03-01 https://phychemstudio.com/blog/how-to-prepare-for-physics-and-chemistry-exams monthly 0.5 2023-03-01 https://images.squarespace-cdn.com/content/v1/632d4f5c191fe857b7ff1ed4/524eb6da-22d9-4404-9f0a-1c58c96e5ca5/Screenshot+2023-02-21+at+1.58.15+PM.png Blog - How to prepare for physics and chemistry exams - Make it stand out For each topic, start with practicing a few questions (while referring to notes), after which, review your mistakes and then consult a teacher or tutor to clarify your misunderstandings. 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