The number of molecule in 9 gram of ice H2O is
Correct answer: D. 3.01×10²³
- A. 6.02×10²³
- B. 3.01×10²²
- C. 6.02×10²²
- D. 3.01×10²³
Explanation
H=1g/mol. O=16g/mol.Mr of H2O= (2x1) + 16 =18g/molMole=Mass/MrMole= 9/18 =1/2mol1mole => 6.02x10^23 molecules 1/2mole => x molecules x= 3.01x10^23 molecules
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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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