115k views
5 votes
Fill in the missing number to balance the equation. 2 Fe + 3H₂SO₄ → 1 Fe₂⁺(SO₄)3 + _ H₂?

User Temple
by
8.0k points

1 Answer

1 vote

Final answer:

To balance the equation, 3 molecules of hydrogen gas are produced. To find out how many grams of SO3 can react with 3.59 mol of Fe2O3, we use a two-step mole-mass calculation sequence, resulting in 862 g of SO3.

Step-by-step explanation:

The missing number to balance the given equation 2 Fe + 3H₂SO₄ → 1 Fe₂³(SO₄)3 + _ H₂ is 3. By balancing the hydrogen atoms, we can find that three molecules of hydrogen gas (H₂) are produced. Now, let’s address the main question which involves calculating how many grams of SO3 can react with 3.59 mol of Fe2O3 by using a mole-mass calculation sequence.

Following the balanced chemical equation Fe2O3 + 3SO3 → Fe2(SO4)3, we determine the appropriate molar ratio which is 3 mol SO3 to 1 mol Fe2O3. This sets up our conversion factor:

  • 3.59 mol Fe2O3 × (3 mol SO3 / 1 mol Fe2O3) = 10.77 mol SO3

Next, using the molar mass of SO3, which is 80.07 g/mol, we calculate the mass:

  • 10.77 mol SO3 × 80.07 g/mol = 862 g of SO3

The final answer, expressed with three significant figures, is 862 g of SO3 that will react with 3.59 mol of Fe2O3.

User PushpikaWan
by
7.9k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.