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A sample of air contains 2.33 x 10^-4 mg of lead per mL of gas. This air passes through an office, the volume of which is 3.25 x 10^4 L. Seven people normally work in this office. How many mg of lead will each person in the office receive from this sample? (assume all the lead is absorbed)

My answer is 7.57x10^3mg

Is this correct? Does it have the correct amount of significant digits?

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