Ozone (O3) filters the cosmic rays of sunlight. How many oxygen atoms are therein 0.2 mole of ozone (O3, molar mass 48.0 g/mol)?
Correct answer: C. 3.61 x 10^23
- A. 6.02 x 10^22
- B. 6.02 x 10^23
- C. 3.61 x 10^23
- D. 6 x 10^23
Explanation
As one ozone molecule contains 3 oxygen atoms 1 Mole of Ozone = 3 × 6.022 × 10 ^ 23 Oxygen Atoms0.2 Moles Of Ozone = 3 × 6.022 × 10 ^23 × 0.2 Oxygen Atoms0.2 Moles Of Ozone = 3.61 x 1023 Oxygen Atoms
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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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