1) How many significant figures are in the number 0.004560? a) 3 b) 4 c) 5 d) 6 2) Which of the following numbers has 5 significant figures? a) 0.00034 b) 45,600 c) 7.8900 d) 100 3) Write 0.0000723 in scientific notation. a) 7.23 × 10⁵ b) 7.23 × 10⁴ c) 7.23 × 10⁻⁵ d) 7.23 × 10⁻⁴ 4) Convert 250 mL to liters. a) 0.025 L b) 2.5 L c) 0.25 L d) 2500 L 5) How many millimeters are in 3.5 meters? a) 0.035 mm b) 35 mm c) 350 mm d) 3,500 mm 6) A student performs an experiment to determine the concentration of a solution and records the following molarity values from five0.250 M, 0.265 M, 0.240 M, 0.255 M, and 0.245 M Calculate the standard deviation of these measurements. Show all steps in your calculation. a) NO OPTION b) OPEN ENDED

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