Identify the Molecular mass for Glucose (C6H12O6) among the following.
Correct answer: C. 180amu
- A. 190amu
- B. 188amu
- C. 180amu
- D. 98amu
Explanation
The molecular mass of glucose is calculated as (6 x 12 amu) + (12 x 1 amu) + (6 x 16 amu) = 72 amu + 12 amu + 96 amu = 180 amu. Thus, one molecule of glucose has a molecular mass of 180 amu. The likely error is choosing 190 amu by making an addition or atomic-mass mistake.
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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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