4-Descriptive Questions|Part-1|Chapter#4|Stoichiometry|9th Class Chemistry New Book 📚 2025|

#descriptive questions 1-Which conditions must be fulfilled before writing a chemical equation for a reaction? 2-Explain the concept of Avogadro's Number and mole. 3-How many grams of CO₂ will be produced when we react 10 g of CH₄ with excess of O₂ according to the given equation? 4-How many moles of coal are needed to produce 10 moles of CO according to the following equation? 5-How much SO₂ is needed in grams to produce 10 moles of sulphur? #chemistry #9thclasschemistry new book #chemicalequations #education #newbook #ptb #ptcb #punjabtextbookboard #class 9 chemistry new book 📚📖 #chapter4 #stoichiometry #stoichiometric calculations #numericals solutions #viraleducationalvideo #educationalcontent #educationalvideo #chemistry by Shoaib Javed