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Rita divides Avogadro’s number (approximately 6.022 mc002-1.jpg 1023) by 2.0550 to calculate the number of atoms in a sample. Which expression gives her result to the correct number of significant figures?

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Kalahira

Here you have two numbers. Avogadro's number is given with four significant figures, while number 2.0550 is given with five significant figures. That means that your result must be shown with four significant figures. So, 6.022 10 ^ 23 / 2.0550 = 2.930 10 ^ 23, which has been rounded to four significant figures. Answer: 2.930 * 10 ^ 23

some1farted4u

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Answer is B

Explanation: Trust

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