The number of moles of H2O which contain 16g of oxygen:
Correct answer: A. 1.0
- A. 1.0
- B. 0.5
- C. 0.25
- D. 0.1
Explanation
The molar mass of H2O is 18 g/mol and molar mass of O2 is 32 g/mol. To find out how many moles of O2 are in 16g, we divide given mass (16g) by the molar mass of O2 (32 g/mol). This calculation results in approximately 0.500 moles of O2. Since H2O contains 2 moles of hydrogen for every mole of oxygen, we multiply the moles of oxygen (0.500 moles) by 2. This gives us approximately 1 mole of H2O. In summary, 16g of oxygen cofrrespond to 1 mole of H2O.
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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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