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Gelneren [198K]
2 years ago
9

Lead(II) chromate, PbCrO4, is a yellow paint pigment (called chrome yellow) prepared by a precipitation reaction. In a preparati

on, 52.5 g of lead(II) chromate is obtained as a precipitate. How many moles of PbCrO4 is this
Chemistry
1 answer:
Roman55 [17]2 years ago
8 0

Answer:

n = 0.1624 moles

Explanation:

n=\frac{m}{M} \\n=\frac{52.5}{323.1937} \\n= 0.1624 mol

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A 2.5 L flask is filled with 0.25 atm SO3, 0.20 atm SO2, and 0.40 atm O2, and allowed to reach equilibrium. Assume at the temper
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Explanation:

Reaction equation for the given chemical reaction is as follows.

      2SO_{3} \rightleftharpoons 2SO_{2} + O_{2}

Equation for reaction quotient is as follows.

         Q = \frac{P^{2}_{SO_{2}} \times P_{O_{2}}}{P^{2}_{SO_{3}}}

             = \frac{(0.20)^{2} \times 0.40}{(0.25)^{2}}

             = 0.256

As, Q > K (= 0.12)

The effect on the partial pressure of SO_{3} as equilibrium is achieved by using Q, is as follows.

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3 years ago
Name of compound AgC2H3O2
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AgC2H3O2 is: Silver acetate

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A chemist mixes 75.0 g of an unknown substance at 96.5°C with 1,150 g of water at 25.0°C. If the final temperature of the system
AleksAgata [21]
To do this problem it is necessary to take into account that the heat given by the unknown substance is equal to the heat absorbed by the water, but considering the correct sign:

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Clearing the specific heat of the unknown substance:

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3 years ago
What is the maximum number of electrons that can occupy a box in an orbital filling diagram at any energy level?
Rudiy27

Answer: 2

Explanation:

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What is the electronic configuration for berilium?
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Answer:

answer

[He] 2s²

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