Question

The table shows a chemical equation and the dimensional analysis used by a student to calculate the number of moles of Ba3N2 required to produce 8.3 moles of NH3.
Student's Dimensional Analysis
Chemical Equation Dimensional Analysis
Ba3N2 + 6H2O → 3Ba(OH)2 + 2NH3 8.3 mol of NH3 x 1 mol of Ba3N2 / 1 mol of NH3
What is the error in the dimensional analysis? (1 point)

Group of answer choices

8.3 mol of NH3 should be replaced with 2 mol of NH3

1 mol of NH3 should be replaced with 2 mol of NH3

8.3 mol of NH3 should be replaced with 2 mol of Ba3N2

1 mol of Ba3N2 should be replaced with 2 mol of Ba3N2

Answer 1

This problem is providing the chemical reaction whereby barium nitride reacts with water to produce barium hydroxide and ammonia, so the number of moles of barium nitride are required in order to produce 8.3 moles of ammonia. It asks for us to evaluate the student's setup, so we conclude the answer is C. "1 mol of NH3 should be replaced with 2 mol of NH3", according to:

Mole ratios:

In chemistry, stoichiometric calculations are used to figure out the moles or mass of a substance, given information about another one in the reaction. In this case, for the given chemical equation:

$Ba_3N_2 + 6H_2O \rightarrow 3Ba(OH)_2 + 2NH_3$

We evidence a 1:2 mole ratio of barium nitride to ammonia, for that reason, the student's setup:

$8.3 mol NH_3 * \frac{1 mol Ba_3N_2 }{1 mol NH_3}$

Is incorrect, because the ammonia must be accompanied by a 2 rather than the 1 it is given there:

$8.3 mol NH_3 * \frac{1 mol Ba_3N_2 }{2mol NH_3}$

Thereby, the correct answer is C. "1 mol of NH3 should be replaced with 2 mol of NH3"

Learn more about mole ratios: brainly.com/question/15288923