How many 'Cl' (chlorine) atoms are in two moles of chlorine?
Correct answer: D. 2 x 2 x 6.02 x 10^23 atoms
- A. 2 x 6.02 x 10^-23 atoms
- B. 35.5 x 6.02 x 10 23 atoms
- C. 2 x 10^23 atoms
- D. 2 x 2 x 6.02 x 10^23 atoms
Explanation
Number of molecules = 2 moles × Avogadro's numberNumber of molecules = 2 moles × 6.022 x 1023 molecules/moleNumber of molecules = 1.2044 x 1023 molecules of Cl₂ Since each Cl₂ molecule contains two Cl atoms, you need to double the number of molecules to find the total number of chlorine atoms: Total number of Cl atoms = 1.2044 x 1024 molecules of Cl₂ × 2 Cl atoms/moleculeTotal number of Cl atoms = 2.4088 x 1024 chlorine (Cl) atoms = 2 x 2 x 6.02 x 1023 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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