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tia_tia [17]
3 years ago
7

Which student is right?​

Chemistry
1 answer:
alexandr1967 [171]3 years ago
7 0

Answer:

student a

Explanation:

they don't have the same amount of moles of solute

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How much heat, in joules and in calories, must be added to a 75.0–g iron block with a specific heat of 0.449 j/g °c to increase
Marina CMI [18]
The amount of heat needed would be the specific heat multiplied by the mass of the substance and the temperature difference. In this case, the mass would be 75.0–g, the specific heat  would be 0.449 j/g °c, and the temperature difference would be <span>1535 -25= 1510

Then the calculation would be: </span>0.449 j/g °c * 75g * 1510°c = 50,849.25J

In calorie it would be: 50849.25J / 4.184J/cal= 12,153.26 calorie
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The answer is (C) 2 hydrogen atoms

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What is the volume of a substance with a mass of 64.9 g/ and a density of 2.1 g/ml?
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Choose the aqueous solution that has the highest boiling point. These are all solutions of nonvolatile solutes and you should as
FrozenT [24]

Answer:

0.100 M AlCl₃

Explanation:

The variation of boiling point by the addition of a nonvolatile solute is called ebullioscopy, and the temperature variation is calculated by:

ΔT = W.i

Where W = nsolute/msolvent, and i is the Van't Hoff factor. Because all the substances have the same molarity, n is equal for all of them.

i = final particles/initial particles

C₆H₁₂O₆ don't dissociate, so final particles = initial particles => i = 1;

AlCl₃ dissociates at Al⁺³ and 3Cl⁻, so has 4 final particles and 1 initial particle, i = 4/1 = 4;

NaCl dissociates at Na⁺ and Cl⁻ so has 2 final particles and 1 initial particle, i = 2/1 = 2;

MgCl₂ dissociates at Mg⁺² and 2Cl⁻, so has 3 final particles and 1 initial particle, i = 3/1 = 3.

So, the solution with AlCl₃ will have the highest ΔT, and because of that the highest boiling point.

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4 years ago
What is the equilibrium condition in which a gas holds all the water vapor molecules that it can?
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The equilibrium state of a gas when it can hold all the molecules of water vapor is known as saturation.

<h3>Which three equilibrium conditions apply?</h3>

A solid substance subjected to three forces with divergent lines of action is in equilibrium if all three of the following three circumstances hold true:

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  • The paths of action have come together (they cross at the same point)
  • These forces add up to a vector with a total of zero.
<h3>What are equilibrium's first and second conditions?</h3>

An object must satisfy two requirements of equilibrium in order to maintain static equilibrium.

  • First, there must be no net force acting on the item.
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learn more aboute quilibrium condition here

<u>brainly.com/question/517289</u>

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