1 molar solution of glucose in water contains weight of glucose________________?
Correct answer: A. 180g/dm3
- A. 180g/dm3
- B. 170g/dm3
- C. 190g/dm3
- D. 195g/dm3
Explanation
A 1 molar solution contains 1 mol of solute in 1 dm3 of solution. Glucose has molar mass 180 g mol−1, so mass = 1 mol dm−3 × 180 g mol−1 = 180 g dm−3. Students may choose 190 g dm−3 by using an incorrect molar mass for glucose.
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About Moles and Avogadro's Number
The mole connects the microscopic number of particles with measurable mass, using Avogadro's number, 6.022 × 10²³ particles per mole. Questions involve molar mass, conversion between mass, moles and particles, percentage composition, empirical and molecular formulas, and distinguishing atoms, molecules, ions and formula units.
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