How many electrons have to be removed to ionize 1.0 x 10⁻⁶ moles of Ne atoms to Ne⁺ ions in a neon advertising tube?
Correct answer: C. 1.0 x 10⁻⁶ x 6.022 x 10²³
- A. 6.022 x 10²³ / 1.0 x 10⁻⁶
- B. 1.0 x 10⁻⁶ x 6.022 x 10²³ / 20.2
- C. 1.0 x 10⁻⁶ x 6.022 x 10²³
- D. 1.0 x 10⁻⁶ x 6.022 x 10²³ / 9.65 x 10⁴
Explanation
To ionize each Ne atom to a Ne⁺ ion, one electron is removed per atom. Therefore, the total number of electrons to remove is equal to the total number of atoms, which is calculated by multiplying the moles by Avogadro's number.
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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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