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jolli1 [7]
3 years ago
5

The industrial production of ammonia (NH3) involves reacting nitrogen gas with hydrogen gas. If 18.2 kg of ammonia is produced f

rom a reaction mixture that contains 6.0 kg of hydrogen and 30.0 kg of nitrogen, what is the percent yield of the reaction?
Chemistry
1 answer:
Yuliya22 [10]3 years ago
3 0

Answer:

The percent yield of the reaction is 53.5 %

Explanation:

This is the reaction:

3H₂ (g) +  N₂ (g) → 2NH₃(g)

Let's convert the mass we have in moles:

Mass / Molar mass: Moles

Notice that molar mass is in g/m, so we have to convert the mass of reactants from kg to g.

18.2 kg = 18200 g

6 kg = 6000 g

30 kg = 30000 g

6000 g/ 2g/m = 3000 moles H₂

30000 g / 28 g/m = 1071.4 moles N₂

18200 g / 17 g/m = 1070.5 moles NH₃

Ratio of reactants is 3:1 . It's easy to see, that limiting reactant is the hydrogen.

1 mol of N₂ needs 3 moles of H₂

1071.4 mol of N₂ need ____ 1071.4  .3 = 3214.2 moles

I only have 3000 moles of H₂

Let's go to the rule of three

So 3 moles of H₂ __ are needed to make 2 moles of NH₃

3000 moles of H₂ _ are needed to make ( 3000 .2) /3 = 2000 moles

2000 moles are produced if the reaction was at 100 % yield, but we only produced 1070.5 moles of amonia.

So the last rule of three will be:

2000 moles ____ 100 % yield

1070.5 moles ____ (1070.5 . 100) /2000 = 53.5%

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3 years ago
A chemical reaction in which an uncombined element replaces an element that is part of a compound is called a
san4es73 [151]

Answer:

A chemical reaction in which an uncombined element replaces an element that is part of a compound is called a simple substitution reaction or simple displacement reaction.

Explanation:

A simple substitution reaction or simple displacement reaction, called single-displacement reaction, is a reaction in which an element of a compound is substituted by another element involved in the reaction. The starting materials are always pure elements and an aqueous compound. And a new pure aqueous compound and a different pure element are generated as products. The general form of a simple substitution reaction is:

AB + C → A +BC

where C and A are pure elements; C replaces A within compound AB to form a new co, placed CB and elementary A.

So, in a Single replacement reaction an uncombined element replaces an element.

<u><em>A chemical reaction in which an uncombined element replaces an element that is part of a compound is called a simple substitution reaction or simple displacement reaction.</em></u>

3 0
2 years ago
Bohr's model was correct in assigning energy levels to electrons.
Jobisdone [24]

Answer:

yes that is true........

7 0
3 years ago
How many sulfur atoms are there in 3.90 mol of sulfur?
Ilya [14]
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6 0
3 years ago
A red blood cell is placed into each of the following solutions. Indicate whether crenation, hemolysis, or neither will occur. S
Burka [1]

Answer:

Solution A: crenation

Solution B: hemolysis

Solution C: hemolysis

Solution D: crenation

Solution E: crenation

Explanation:

Hemolysis is the rupturing of red blood cells, which results in the release of hemoglobin (from within the red blood cells) into the plasma. If a red blood cell is placed in a hypotonic solution, water will flow into the cell, the cell will swell and hemolysis will.

Crenation: when a red blood cell is placed in a <em>hypertonic solution (</em>such as highly saline solution), the red blood cell will lose water(osmosis) and will shrink in size. The red blood cell has undergone crenation.

In order for a red blood cell to prevent from undergoing hemolysis or crenation, the cell must be placed in an<em> isotonic solution, </em>i.e either in <u>0.9% (m/v) NaCl solution</u> or <u>5% glucose solution</u>

  • Solution B and Solution C are hypotonic solution, thus red blood cell has undergone hemolysis.
  • Solution A, D and E are hypertonic solution. thus red blood cell has undergone crenation
8 0
3 years ago
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