For the reaction 2 N2(g) + 3 H2(g) → 2 NH3(g) which of the following can be determined
using only the coefficients of the balanced chemical equation?
the number of moles of NH3 obtained if 4.2 mol of N2 react completely to form NH3
the weight of NH3 obtained if 4.2 mol of N2 react completely to form NH3
both a and b
neither a nor b
Both a and b can be determined using only the coefficients of the balanced chemical equation.
To determine the number of moles of NH3 obtained if 4.2 mol of N2 react completely to form NH3, you can use the stoichiometry of the balanced equation. In this case, the stoichiometric ratio of N2 to NH3 is 2:2, which means that for every 2 moles of N2, 2 moles of NH3 are produced. Therefore, if 4.2 mol of N2 react completely, you will also produce 4.2 mol of NH3.
To determine the weight of NH3 obtained if 4.2 mol of N2 react completely to form NH3, you need to know the molar mass of NH3. By looking up the molar mass of NH3, which is approximately 17.03 g/mol, you can calculate the weight of NH3 obtained by multiplying the molar mass by the number of moles. In this case, the weight of NH3 obtained would be approximately 4.2 mol * 17.03 g/mol = 71.286 g.
Therefore, both the number of moles of NH3 obtained and the weight of NH3 obtained can be determined using only the coefficients of the balanced chemical equation, making the correct answer option c) both a and b.