Answer:
C
Explanation:
Well, we can see from the equation that hydrogen gas and ethane are in a 2:1 ratio based on their mole coefficients.
You need 2 mol H2 to make 1 mol C2H6. So that means you need 2*13.78 mol H2 to make 13.78 mol C2H6!
2*13.78 = 27.56 mol
C is correct.
If you double the concentration of A, the rate is doubled. If you doubled the concentration of B, since the rate law has B^2, the rate is multiplied by 4. If you double both A & B's concentrations, then the rate would be multiplied by 2*4 = 8, which is the last option.
Required moles of CH₃COONa.3H₂O = Molarity x Volume of solution in L
= 0.100 M x (100.0 mL)
= 0.100 M x 0.100 L
= 0.01 mol
Required mass of CH₃COONa.3H₂O = Required moles x Molar mass
= 0.01 mol x (136.08 g / mol) = 1.3608 g
