Chemistry question! Can someone please help

For the following reaction, 3.26 grams of ethylene (C2H4) are mixed with excess hydrogen gas. The reaction yields 2.36 grams of ethane (C2H6).

hydrogen (g) + ethylene (C2H4) (g) --> ethane (C2H6) (g)

I don't know how to set it up or solve it! Thanks in advance for any help or answers!

You are mixed up! All of a sudden you mention AgCl.
The equation is balanced , so the ratio is 1 to 1 . H2 + C2H4 --> C2H6
Moles of C2H4 = 3.26 / 28 = 0.116
Moles of C2H6 = 2.36 / 30 = 0.0787
The C2H4 is in excess.
Grams of C2H6 prodiced = 0.0787 x 30 m= 3.49g