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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