Question

a rubber balloon has become negatively charged from being rubbed with a wool cloth, and the charge is measured as 1.00 × 10⁻¹⁴ c. according to this charge, the balloon contains an excess of how many electrons?

Explanation:

Step1: Recall the charge of one electron

The charge of one electron is \(e = 1.6\times10^{-19}\text{ C}\).

Step2: Use the formula \(n=\frac{Q}{e}\)

Here, \(Q = 1.00\times10^{-14}\text{ C}\) (total charge on the balloon) and \(e = 1.6\times10^{-19}\text{ C}\) (charge of one electron).
Substitute the values into the formula: \(n=\frac{1.00\times 10^{-14}}{1.6\times 10^{-19}}\)

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Answer:

\(6.25\times 10^{4}\)