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3 cards from this section. Quick, good the night before a test.
How many significant figures are in 0.00230?
Count the non-zero digits and the trailing zero.
Round the number 3.146 to two decimal places.
Look at the third decimal place to decide how to round.
How many significant figures are in the number 0.0405?
Remember leading zeros do not count.
When adding 2.25 and 3.1, what should the final answer be rounded to?
Look at the decimal places of both numbers.
Calculate the area of a rectangle where the length is 3.25 m and the width is 2.5 m. Report with significant figures.
Area is calculated by multiplication; watch how the significant figures limit your answer.
When mixed, a solution contains 500 mL of 2.5 M NaCl and 200 mL of 1.0 M NaCl. What is the final concentration? Provide the answer with correct significant figures.
Remember to use the correct units and significant figures through your calculations.
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