Question

Directions: Analyze the following equations. Then answer the given questions.

1 4FeS + 70 2 2Fe 2 O 3 + 4SO 2 Calculate the number of moles of Fes if there are 10 moles of Fe,O, 2 BCO + 17H 2 C 8 H 18 + 8H 2 O Calculate the number of moles of C_{1}*H_{10} there are 40 moles H_{2} ?

3. 2As + 6NaOH 2Na,AsO 3 + 3H 2 Calculate the mole of As if there are 6 moles of NaOH?

4. TiCl 4 + 2H 2 O TiO 2 + 4HCl Calculate the mole of if there are 4 moles of H_{2}*O ?

5. 4NH 3 + 5O 2 4NO + 6H 2 O Calculate the mass of NO if there are 4 moles of N*H_{3} ,?

Answer 1

1. 4FeS + 7O₂ → 4SO₂ + 2Fe₂O₃

n(FeS) = 2n(Fe₂O₃) $= 2 \times 10 = 20 \;moles$

2. 8CO + 17H₂ → C₈H₁₈ + 8H₂O

n(C₈H₁₈) = $\frac{1}{17}$ n(H₂) $= \frac{1}{17} \times 40 = 2.35 \;mol$

3. 2As + 6NaOH → 2Na₃AsO₃ + 3H₂

n(As) = $\frac{1}{3}$ n(NaOH) $= \frac{1}{3} \times 6 = 2 \;mol$

4. TiCl₄ + 2H₂O → 4HCl + TiO₂

n(TiCl₄) = $\frac{1}{2}$ n(H₂O) $= \frac{1}{2} \times 4 = 2 \;mol$

5. 4NH₃ + 5O₂ → 4NO +6H₂O

n(NO) = n(NH₃) = 4 moles

MM(NO) = 30 g/mol

m(NO) $= 4 \times 30 = 120 \;g$