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Praxis II General Science

Category - Chemistry

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Given that the atomic mass of chlorine is 35.5 grams/mol, approximately what is the weight of an individual chlorine atom?

5.8 x 10^-23 grams
1.1 x 10^-25 grams
10.5 x 10^-8 grams
0.355 grams
2.6 x 10^-23 grams

Explanation

Answer: A - This requires knowledge that a mole is 6.022 x 10²³ molecules or atoms. Thus, we can find that the weight of an individual chlorine atom is 35.5 grams divided by 6.022 x 10²³, which is approximately 5.8 x 10^-23 grams.

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