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Chemistry lab homework--I need help converting measurements?

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I'm working on my chemistry lab homework, and I'm not sure if I've done all of my converting right.

Here's the question: DNA is approximately 2.5 nm (nanometers) in length. If an average man is 6 ft tall, how many DNA molecules could be stacked end to end in an average man?

I believe that 1,000,000,000 nm=1m and 1m=3ft. Therefore, 1,000,000,000 nm should equal 3ft. All of that information may not be correct, but I'm pretty sure it is. I need someone else to work this, and share the final number they come up with.

Any help will be appreciated!

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  1. let's get closer to the meters for 6 feet:

    6 feet @ 0.305 meter / foot = 1.83 meters

    1.83 meters = 1.83 e9 nanometers

    1.83 e9 nanometers @ DNA / 2.5 nm  =

    your answer is: 7.2 e8 DNA's

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