For Questions 815 cound the number seven to 3 segnaficant figures, Include units on your answer....

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Answer 1

Answer #1

8) 82.337

Explanation : - As there are no numbers after 3 decimal places, rounding off results in 82.337.

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9) 13 L

Explanation : - The number in the fourth decimal place is 9 and number in the 1st , 2nd and 3rd decimal places are also 9. Hence the number gets rounded off to the next whole number i.e. 13.

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10) 3.75 m

Explanation : - There are only 2 numbers after decimal places, therefore rounding off results in 3.75.

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11) 0.01 mm

Explanation : - The number in the fourth decimal place is 2 which is less than 5, hence the number in the 3rd decimal place is not rounded.

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12) 5.713 KJ / mol

Explanation : - The number in the fourth decimal place is 2 which is less than 5, hence the number in the 3rd decimal place is not rounded.

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13) 7.908 $\times$ 10¹⁴ atoms

Explanation : - The number in the fourth decimal place is 4 which is less than 5, hence the number in the 3rd decimal place is not rounded.

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14) 3.998 g

The number in the fourth decimal place is 6 which is greater than 5, hence the number in the 3rd decimal place is rounded off to next number.

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15) 18.274 KJ/ mol

Explanation : - The number in the fourth decimal place is 1 which is less than 5. Hence the number in the 3rd decimal place is not rounded.

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Answer 2

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