Posted by **Bella** on Thursday, November 21, 2013 at 7:22pm.

if your lab partner determined that there were 4.030 x 1020 atoms of H in an unknown sample of C2H4Cl2, how many milligrams would the unknown sample weigh?

- chemistry -
**DrBob222**, Thursday, November 21, 2013 at 8:35pm
See your post below.

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