LACH PROBLEM
1. Consider the following reaction: 2Al + 6HBr →   2AlBr3    + 3H2
a. When 4.63 moles of Al reacts with 7.82 moles of HBr, how many moles of H2 are formed?
b. What is the limiting reactant?
2. Consider the following reaction: 3Si + 2N2 → Si3N4
a. When 16.35 moles of Si reacts with 11.26 moles of N2, how many moles of Si3N4 are formed?
b. What is the limiting reactant?
3. Consider the following reaction: 2CuCl2 + 4KI → 2CuI   + 4KCl + I2
a. When 8.23 moles of CuCl2 reacts with 9.45 moles of KI, how many moles of I2 are formed?
b. What is the limiting reactant?
4. Consider the following reaction: 4FeS2 + 11O2 →          2 Fe2O3 + 8SO2
a. When 38.75 moles of FeS2 reacts with 12.62 moles of O2, how many moles of SO2 are formed?
b. What is the limiting reactant?
5. Consider the following reaction: 4NH3 + 5O2 4NO + 6H2O
a. When 13.24 moles of NH3 reacts with 18.68 moles of O2, how many moles of NO are formed?
b. What is the limiting reactant?
6. Consider the following reaction: 2C2H6 + 7O2 6H2O + 4CO2
a. When 3.13 moles of C2H6 reacts with 8.25 moles of O2, how many moles of CO2 are formed?
b. What is the limiting reactant?
7. Consider the following reaction: 2As + 6NaOH 2Na3AsO3 + 3H2
a. When 5.82 moles of As reacts with 14.17 moles of NaOH, how many moles of H2 are formed?
b. What is the limiting reactant?
8. Consider the following reaction: Au2S3 + 3H2 2Au + 3H2S
a. When 6.25 moles of Au2S3 reacts with 8.45 moles of H2, how many moles of Au are formed?
b. What is the limiting reactant?
9. Consider the following reaction: 4H2O + 7CO2 C7H8 + 9O2
a. When 22.65 moles of H2O reacts with 48.92 moles of CO2, how many moles of C7H8 are formed?
b. What is the limiting reactant?
10. Consider the following reaction: 4Fe + 3O2 2Fe2O3
a. When 15.81 moles of Fe reacts with 16.93 moles of O2, how many moles of Fe2O3 are formed?
b. What is the limiting reactant?

Question

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superman1987 superman1987 · Answer 1 · 2019-03-10T22:14:58+01:00

Answer:

1)

a) 3.9 mol.

b) The limiting reactant here is HBr that is in a low no. of moles and Al is in excess.

2)

a) 5.45 mol.

b) The limiting reactant here is Si that is in a low no. of moles and N2 is in excess.

3)

a) 2.36 mol.

b) The limiting reactant here is KI that is in a low no. of moles and CuCl2 is in excess.

4)

a) 2.36 mol.

b) The limiting reactant here is O2 that is in a low no. of moles and FeS2 is in excess.

5)

a) 13.24 mol.

b) The limiting reactant here is NH3 that is in a low no. of moles and NO is in excess.

6)

a) 2.71 mol.

b) The limiting reactant here is O2 that is in a low no. of moles and C2H6 is in excess.

7)

a) 7.085 mol.

b) The limiting reactant here is NaOH that is in a low no. of moles and As is in excess.

8)

a) 5.632 mol.

b) The limiting reactant here is H2 that is in a low no. of moles and Au2S3 is in excess.

9)

a) 5.6625 mol.

b) The limiting reactant here is H2O that is in a low no. of moles and CO2 is in excess.

10)

a) 7.905 mol.

b) The limiting reactant here is Fe that is in a low no. of moles and O2 is in excess.

Explanation:

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