2.7 SIGNIFICANT FIGURES

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1. 5.74 g of a substance occupies 1.2 cm^3. Its density is

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4.8

4.78

4.783

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2. The length and breadth of a metallic plate are 8.4 cm and 2.12 cm. The area of the plate (in cm^2) is

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1.7808x10^1

1.80x10^1

1.8x10^1

1.7x10^1

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3. The dimensions of a small book is measured as 32.2 mm, 54.2 mm, 13.7 mm. What measuring tool could have been used to obtain these readings?

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Measuring Tape

Vernier Calliper

Micrometer Screw Gauge

Meter Scale

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4. How many significant digits are in 6.02 X 10^23?

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This number is to big to determine the significant digits

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5. Determine the number of significant digits in 10.00 seconds.

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6. How many significant digits are in 0.0010 mL?

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7. Determine the number of significant digits in 83 cars.

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infinite

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8. What is 3.12 g + 0.8 g + 1.033 g =

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4.953 g

5.0 g

5 g

4.9 g

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9. Subtract: 7.987 m - 0.54 m

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7.447 m

7.5 m

7.45 m

7.4 m

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