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Akimi4 [234]
2 years ago
7

Utilizing dimensional analysis, find the number of inches in a kilometer given that 1 inch = 2.54 centimeters

Chemistry
2 answers:
abruzzese [7]2 years ago
8 0

Answer:

The correct answer is 39,370.

maxonik [38]2 years ago
4 0
To answer this item, we need to utilize the appropriate the conversion factors and the dimensional analysis. 

Our basis for solving is 1 kilometers. It is known that each kilometer is composed of 1000 meters. 
  
          (1 km) x (1000 m/1 km) = 1000 m

Next, we need to determine the number of centimeters. The conversion factor that can be used is 1 meter = 100 centimeters
          (1000 m) x (100 cm/ 1 m) = 100,000 cm

Lastly, we use the given conversion factor to convert the centimeters to inches.
  
              (100,000 cm) x (1 inch / 2.54 cm)
                     = 39,370.08 in

<em>ANSWER: Each kilometer is composed of 39,370.08 inches</em>
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Phosphorous trichloride (PCl3) is produced
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The percentage yield obtained from the given reaction above is 74.8%

<h3>Balanced equation </h3>

P₄ + 6Cl₂ → 4PCl₃

Molar mass of P₄ = 31 × 4 = 124 g/mol

Mass of P₄ from the balanced equation = 1 × 124 = 124 g

Molar mass of PCl₃ = 31 + (35.5×3) = 137.5 g/mol

Mass of PCl₃ from the balanced equation = 4 × 137.5 = 550 g

<h3>SUMMARY</h3>

From the balanced equation above,

124 g of P₄ reacted to produce 550 g of PCl₃

<h3>How to determine the theoretical yield </h3>

From the balanced equation above,

124 g of P₄ reacted to produce 550 g of PCl₃

Therefore,

79.12 g of P₄ will react to produce = (79.12  × 550) / 124 = 350.9 g of PCl₃

<h3>How to determine the percentage yield </h3>
  • Actual yield of PCl₃ = 262.6 g
  • Theoretical yield of PCl₃ = 350.9 g
  • Percentage yield =?

Percentage yield = (Actual /Theoretical) × 100

Percentage yield = (262.6 / 350.9) × 100

Percentage yield = 74.8%

Learn more about stoichiometry:

brainly.com/question/14735801

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If mass =180kg and volume =90m3, what is the density
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To find the density you must divide the mass by the density.
180kg ÷ 90m³ = 2kg/m<span>³
The density is </span>2kg/m³
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Ocean water freezes at a lower temperature than freshwater. ... Fresh water freezes at 32 degrees Fahrenheit but seawater freezes at about 28.4 degrees Fahrenheit , because of the salt in it.

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