If it were determined that there were 6.391 x 10^22 atoms of H in an unknown sample of C2H4Cl2, how many milligrams would the unknown sample weigh?
Sorry for all the questions Dr. Bob.
2 answers
So there are 6.391E22/4 molecules of C2H4Cl2. That divided by 6.022E23 = number of moles C2H4Cl2. Then moles x molar mass = grams. Convert to mg.
A sample of 0.43 moles of a metal M reacts completely with excess chlorine to form 18.23 grams of MCl.
How many moles of Cl are in the sample of MCl that forms?
How many moles of Cl are in the sample of MCl that forms?