InterviewSolution
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Which of the following would weigh the highest?A. 0.2 mole of sucrose (C12H22O11)B. 2 moles of CO2C. 2 moles of CaCO3D. 10 moles of H2O |
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Answer» A. 0.2 mole of sucrose (C12H22O11): Given: Number of moles = 0.2 Molar mass of C12H22O11 = 342 g/mol To find out the mass of sucrose, apply the formula given: Number of moles = \(\frac{Mass}{Molar\,mass}\) ⇒ 0.2 = \(\frac{mass}{342\,g/mol}\) ⇒ Mass = 0.2 mol × 342g/mol ⇒ Mass = 68.4g Thus, the mass of sucrose is 68.4 g. B. 2 moles of CO2: Given: Number of moles = 2 Molar mass of CO2 = 44 g/mol To find out the mass of sucrose, apply the formula given: ⇒ Mass = 2 mol × 44g/mol ⇒ Mass = 88g Thus, the mass of CO2 is 88 g. C. 2 moles of CaCO3: Given: Number of moles = 2 Molar mass of CaCO3 = 40 + 12 + 3× 16 = 100 g/mol To find out the mass of sucrose, apply the formula given: Number of moles = \(\frac{Mass}{Molar\,mass}\) ⇒ 2 = \(\frac{mass}{100\,g/mol}\) ⇒ Mass = 2 mol × 100g/mol ⇒ Mass = 200g Thus, the mass of CaCO3 is 200 g. D. 10 moles of H2O: Given: Number of moles = 10 Molar mass of H2O = 18 g/mol To find out the mass of sucrose, apply the formula given: Number of moles = \(\frac{Mass}{Molar\,mass}\) ⇒ 10 = \(\frac{mass}{18\,g/mol}\) ⇒ Mass = 10 mol × 18g/mol ⇒ Mass = 180g Thus, the mass of H2O is 180 g. Hence, the option C is correct which has higher mass. |
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