112 ml of a gas is produced at STP by the action of 0.412 gm of ROH alcohol with CH3Mgl. Molecular mass of alcohol is:
Correct answer: C. 80 g
- A. 32 g
- B. 41.2 g
- C. 80 g
- D. 156 g
Explanation
Following is the solution to this question:To find the molecular mass of the alcohol, we can use the formula:Molecular mass = (Mass of alcohol) x (Molar volume of gas at STP) / (Volume of gas produced)Rearranging the formula to solve for molecular mass, we get:Molecular mass = (0.412 g) x (22.4 L) / (0.112 L)Molecular mass = 80 g/molSo, the molecular mass of the alcohol is 80 g/mol.
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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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