what total mass of product will form when 1.38 L of c3h8 at 25 degrees C and 760 torr react with 75.0 mL of 5.33 M h2cr04?
a. 48.2g
b.114g
c. 342g
d. 9.71g
See your post above.
To find the total mass of the product formed, we need to determine the limiting reactant first. The limiting reactant is the reactant that will be completely consumed during the reaction and limits the amount of product that can be formed.
To determine the limiting reactant, we can use stoichiometry and the given molar quantities of the reactants.
1. Start by calculating the moles of both reactants using the ideal gas law and molarity, respectively.
For C3H8:
n(C3H8) = (P * V) / (R * T)
where P = pressure (760 torr), V = volume (1.38 L), R = ideal gas constant (0.0821 L * atm / mol * K), T = temperature in Kelvin (25 °C + 273.15 = 298.15 K)
n(C3H8) = (760 torr * 1.38 L) / (0.0821 L * atm / mol * K * 298.15 K)
For H2CrO4:
n(H2CrO4) = Molarity * Volume
where Molarity = 5.33 M, Volume = 75.0 mL (convert to L = 0.075 L)
n(H2CrO4) = 5.33 M * 0.075 L
2. Use the balanced chemical equation to determine the stoichiometric ratio between C3H8 and H2CrO4.
The balanced equation is not provided in the question, so it needs to be given to proceed with the calculation.
3. Determine the mole ratio between C3H8 and H2CrO4 based on the balanced equation.
For example, if the balanced chemical equation is:
C3H8 + H2CrO4 → X moles of product
The ratio is determined by the coefficients in the balanced equation, which in this case is 1:1.
4. Compare the moles of C3H8 and H2CrO4 using the mole ratio.
If the mole ratio is 1:1, whichever reactant has fewer moles is the limiting reactant.
5. Once the limiting reactant is determined, use the stoichiometry again to find the moles of product formed.
Use the balanced chemical equation to determine the stoichiometric ratio between the limiting reactant and the product. Multiply this ratio by the moles of the limiting reactant to find the moles of the product.
6. Convert the moles of the product to grams by multiplying by the molar mass of the product.
The molar mass of the product is not given in the question, so it needs to be provided to continue with the calculation.
Lastly, compare the calculated mass of the product with the given answer choices to identify the correct option.