calculate the moles of CL atoms in 0.070 of C2H4Cl2

Question

Very urgent chemistry hw due tomorrow at 11am

Answer 1

Do you mean you have a mass of 0.070 grams of C₂H₄Cl₂?  Assuming you know how much mass of the compound you have, here is how to solve the problem:

 

Find the molecular weight of C₂H₄Cl₂ by adding atomic weights:  2(C) + 4(H) + 2(Cl)

 

Divide the mass of C₂H₄Cl₂ by the molecular weight of C₂H₄Cl₂.  This gives you the number of moles of C₂H₄Cl_2.

 

Multiply the number of moles of C₂H₄Cl₂ by 2, since there are 2 atoms of Cl in each molecule of C₂H₄Cl₂.  This is the number of moles of Cl present.