The reaction of 15 g of ethene with hydrogen gave ethane. determine its mass

We carry out the solution:
1. In accordance with the condition of the problem, we compose the equation of the process:
m = 15 g. X g. -?
C2H4 + H2 = C2H6 – hydrogenation, ethane obtained;
1 mol 1 mol.
2. Calculations by formulas:
M (C2H4) = 28 g / mol.
M (C2H6) = 30 g / mol.
3. Determine Y (mol) of the starting material:
Y (C2H4) = m / M = 15/28 = 0.5 mol.
Y (C2H6) = 0.5 mol since the amount of substances according to the equation is 1 mol.
4. Find the mass of the product:
m (C2H6) = Y * M = 0.5 * 30 = 15 g.
Answer: in the process of hydrogenation, ethane with a mass of 15 g was obtained.