The number of moles of CO2 which contains 16 g of oxygen Is:
Correct answer: B. 0.5
- A. 0.25
- B. 0.5
- C. 1.00
- D. 1.50
Explanation
One mole of CO2 has a mass of 44 g and 32 g of O2. So 16 g of O2 have 22 g of CO2 or 0.5 moles of it.
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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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