Mass of 1 molecule of O2 is:
Correct answer: B. (32 / 6.02 x 10^23) g
- A. (6.02 x 10^23 g / 32)
- B. (32 / 6.02 x 10^23) g
- C. 32 g
- D. 0.32 g
Explanation
The mass of 1 mole of oxygen gas (O2) is 16+16 = 32g/mol.1 mole of oxygen gas contains 6.02x1023 molecules. So, to find out the mass of one molecule of O2, we need to divide 32g by 6.02x1023. Hence, B is the correct option.
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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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