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Question

Drinking water may contain dissolved calcium hydrogen-carbonate, $$Ca(HCO_3)_2$$. How many electrons are present in a hydrogen-carbonate anion?

A

$$30$$

B

$$31$$

C

$$33$$

D

$$32$$

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Solution

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Correct option is C. $$32$$
$$\text{There are 32 electrons are present in a hydrogen carbonate anion.}$$

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