Question

How many grams of ammonia (NH3) are produced if 4 grams of hydrogen gas (H2) reacts with excess nitrogen gas (N2) according to the chemical equation below:

3 H2 + N2 à 2 NH3


2.43 g


4.86 g


11.33 g


22.66 g

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QUESTION 6

Identify the limiting reactant if 5 g of N2 is allowed to react with 5 g of H2 according to the chemical equation given below. Determine the theoretical yield of the product NH3.

3 H2 + N2 à 2 NH3



limiting reactant is H2 ; theoretical yield = 6.07 g of NH3


limiting reactant is H2 ; theoretical yield = 28.33 g of NH3


limiting reactant is N2 ; theoretical yield = 6.07 g of NH3


limiting reactant is N2 ; theoretical yield = 28.33 g of NH3

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QUESTION 7

For a given chemical reaction, the chemist determined the theoretical yield of product is equal to 15.1 grams. In the laboratory, the chemist only recovered 8.25 grams of product (the actual yield). Calculate the percent yield.


32.7%


48.9%


54.6%


82.3%

Answer 1

Base from the chemical reaction :3 H2 + N2 à 2 NH3

Given 4 g H2

Mass NH3 = 4 g H2 ( 1 mole H2 / 2 g H2) ( 2 mol NH3 / 3 mol H2) ( 17 g NH3 / 1 mol NH3)

mass NH3= 22.66 g NH3 produce from 4 g H2