Question

What mass of NH3 can be made from 35.0 grams of N2

Answer 1

42.5g

Explanation:

Given parameters:

Mass of N₂= 35g

Unknown:

Mass of NH₃  = ?

Solution:

  Equation of the reaction:

         N₂  +  3H₂  →   2NH₃

To solve this problem, we work from the known species to the unknown. The known here is the reacting mass of the N₂. From this we can find the number of moles of the N₂.

            Number of moles of N₂ = $\frac{mass}{molar mass}$

molar mass of N₂ = 28g/mol

        Number of moles = $\frac{35}{28}$ = 1.25moles

From the equation of the reaction:

           1 mole of N₂ produced 2 moles of NH₃

     1.25 moles of N₂ will produce 2 x 1.25 = 2.5moles of NH₃

Mass of NH₃ = Number of moles of NH₃ x molar mass of NH₃

                       = 2.5 x (14 + 3)

                       = 42.5g

Learn more:

number of moles brainly.com/question/1841136

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