A carbon compound containing carbon and oxygen has approximate molar mass equal to 290 g. On analysis it is found to contain 50% by mass of each element. Therefore molecular formula of the compound is:
Correct answer: A. C12O9
- A. C12O9
- B. C4O3
- C. C3O4
- D. C9O12
Explanation
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Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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