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grandymaker [24]
3 years ago
9

Identify the law that explains the following observation:

Chemistry
1 answer:
kirill [66]3 years ago
4 0

Answer:

Proust's law of definite proportion

Explanation:

The law of constant proportion states that the components elements of a given chemical compound combine with each other in a fixed mass ratio when the compound is produced by any given process

Therefore, from the question, the chemical formula for Nitrogen Dioxide is NO₂, where the molar mass of nitrogen, N = 14

The molar mass of oxygen, O = 16

Given that one molecule of NO₂, contains one atom of nitrogen and two atoms of oxygen, one mole of NO₂ will contain 14 grams of nitrogen and 32 grams of oxygen, according to Proust's law of definite proportion.

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A gas occupies 12.3 liters at a pressure of 40.0 mm Hg. What is the volume when the pressure is increased to 60.0 mm Hg?
statuscvo [17]

Answer:

Final volume = V₂ =  8.2L

Explanation:

Given data:

Initial volume = 12.3 L

Initial pressure = 40.0 mmHg

Final volume = ?

Final pressure = 60.0 mmHg

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

40.0 mmHg × 12.3 L = 60.0 mmHg × V₂

V₂ = 40.0 mmHg × 12.3 L / 60.0 mmHg

V₂ =  492 mmHg. L /  60.0 mmHg

V₂ =  8.2L

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3 years ago
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Hitman42 [59]

Answer: oxide

Explanation:..

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Which statements about the operation of an automated micropipettor are true? The volume dial has already been set, do not alter
yanalaym [24]

Answer:

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The correct statement is that the point of initial resistance is the level of depression that will fill the pipette with the desired volume of solution.

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Answer:

The answer is a

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