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March 1, 2015

Homework Help: Chemistry (URGENT)

Posted by John on Wednesday, November 24, 2010 at 2:46am.

How many Al atoms thick is the aluminum foil if it is 0.00157cm thick.

1 Al atom = 286pm

Convert pm to m
286pm = 2.86*10^-10m

Convert m to cm
2.86*10^-10m = 2.9*10^-8cm

Divide aluminum thickness and Al atom thickness
1.57*10^-3 / 2.9*10^-10 = 54138

So the aluminum foil is 54138 Al atoms thick?

Am I correct? If not please correct me!

Thank you very much.

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