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2 years ago

A sample of gas has a mass of 0.560 g . Its volume is 125 mL at a temperature of 85 ∘C and a pressure of 757 mmHg .

Chemistry

1 answer:

-BARSIC- [3]2 years ago

4 0

Answer:

132g/mole

Explanation:

using the formula PV=nRT should be used to solve for the number of moles (n). R is a constant which is 62.3637 L mmHG/mole K.

Inorder for your units to match you will have to convert 125ml to .125L and the temperature of 85C to K . you do that by adding 273 to the 85C and get 358K. Once you solve for n then you use that number and divide by the number of grams from the question (.560g) since molar mass is grams/moles.

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A pure substance can be separated by chemical means, while a mixture can be separated by physical means.

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There are equal numbers of atoms on both sides.

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carbon dioxide and water

4. Which one of the following is not a homogeneous mixture?

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vegetable soup

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More solvent can be dissolved

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It is uniform in composition.

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The solute dissolves.

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Answer:

pure substance.

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Answer:

12. In a solution of salt and water, which component is the solute?

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Answer:

15. What is the difference between a compound and a mixture?

Answer:

A compound is a pure substance, but a mixture is not.

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2HgO ==> 2Hg + O2

Mass of HgO = 100 g

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From balance chemcial equation

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2 = 1

0.46 = (1 × 0.46 ) ÷ 2 = 0.23 moles

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Solution

12g Fe + 64g S → _____ g FeS

According to Law of Conservation of Matter, The total mass of reactant is equal to total mass of product , so the number of grams of iron sulfide (FeS) that will be produced in this reaction as follow.

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