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3 years ago

The percentage yield for the reaction

Chemistry

1 answer:

makkiz [27]3 years ago

5 0

Answer:

92.87 g.

Explanation:

∵ The percentage yield = (actual yield/theoretical yield)*100.

We need to calculate the theoretical yield:

From the balanced reaction:

PCl₃ + Cl₂ → PCl₅,

It is clear that 1 mol of PCl₃ reacts with 1 mol of Cl₂ to produce 1 mol of PCl₅.

We need to calculate the no. of moles of 73.7 g PCl₃:

n = mass/molar mass = (73.7 g)/(137.33 g/mol) = 0.536 mol.

Using cross multiplication:

1 mol of PCl₃ produce → 1 mol of PCl₅, from stichiometry.

∴ 0.536 mol of PCl₃ produce → 0.536 mol of PCl₅.

∴ The mass of PCl₅ (theoretical yield) = (no. of moles) * (molar mass) = (0.536 mol)*(208.24 g/mol) = 111.62 g.

∵ The percentage yield = (actual yield/theoretical yield)*100.

The percentage yield = 83.2%, theoretical yield = 111.62 g.

∴ The actual yield of PCl₅ = (The percentage yield)(theoretical yield)/100 = (83.2%)(111.62 g)/100 = 92.87 g.

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Answer:

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Explanation:

Given parameters:

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Unknown:

V₂ = ?

Solution:

The combined gas law application to this problem can help us solve it. It is mathematically expressed as;

$\frac{P_{1} V_{1} }{T_{1} } = \frac{P_{2} V_{2} }{T_{2} }$

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where 1 and 2 are initial and final states.

Now,

take the units to the appropriate ones;

kpa to atm, °C to K

P₂ = 319kpa in atm gives 3.15atm

P₁ = 928kpa gives 9.16atm

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T₁ = 129°C gives 129 + 273 = 402K

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3 years ago

What neutral element has the electron configuration described by the Aufbau diagram above.

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Answer:

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Explanation:

The above electronic configuration can be written in a simplified form as shown below:

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Next, we shall determine the number of protons.

Since the element is in its neutral state,

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3 years ago

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Explanation:

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To identify if an element has been reduced or oxidized, the oxidation number is observed in both the reactant and product phase.

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A decrease in oxidation number denotes that the element has been reduced.

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