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The steps involved in solving for the percent yield in a chemical reaction are as follows:
(1) Write a balanced chemical equation.
(2) Determine the limiting reactant in the reaction.
(3) Calculate the theoretical yield of the reaction.
(4) Divide the actual yield by the theoretical yield and multiply by 100.
(5) Check that all significant figures are correct in the calculated value.
The length unit of decimeter is 100 times larger than a millimeter. The relationship between length units is 1 meter = 10 decimeter = 100 centimeter = 1000 millimeter.
Answer:
The theoretical yield of the hydrogen sulfide is 68.0 grams.
Explanation:
Moles of aluminum sulfide = 4.0 mol
Moles of water = 4.0 mol
According to reaction, 6 moles of water reacts with 1 mole of aluminum sulfide,then 4 moles of water will react with :
of aluminum sulfide
1.5 moles aluminum sulfide < 4 moles aluminum sulfide
This means that water is present in limiting amount and aluminum sulfide is in excess amount.So, amount of hydrogen sulfide will depend upon moles of water.
According to reaction, 6 moles of water gives with 3 mole of hydrogen sulfide,then 4 moles of water will give :
of hydrogen sulfide
Mass of hydrogen sulfide:
2.0 mol × 34 g/mol = 68.0 g
The theoretical yield of the hydrogen sulfide is 68.0 grams.