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grandymaker [24]
3 years ago
5

A solution is made by dissolving 4.0 moles of sodium chloride (NaCl) in 2.05 kilograms of water. If the molal boiling point cons

tant for water (Kb) is 0.51 °C/m, what would be the boiling point of this solution? Show all of the work needed to solve this problem.
Chemistry
1 answer:
kozerog [31]3 years ago
4 0
Properties of a solution that depend only on the ratio of the number of particles of solute and solvent in the solution are known as colligative properties. For this problem, we use boiling point elevation concept.

ΔT(boiling point)  = (Kb)mi
ΔT(boiling point)  = (0.51 C-kg / mol )(4.0 mol / 2.05 kg ) (2)
ΔT(boiling point)  = 1.99 C

T(boiling point) = 101.99 C
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3 years ago
Which of the following best describes weight?
hodyreva [135]

Answer:

What best describes the concept of weight is the force on an object due to its mass and gravity.

Explanation:

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3 years ago
Which of the following best defines a mineral and a rock?
Dmitriy789 [7]

Answer:

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Explanation:

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3 0
2 years ago
A runner wants to run 13.1 km . She knows that her running pace is 6.2 mi/h .How many minutes must she run? Hint: Use 6.2 mi/h a
frutty [35]

Answer:

  • <u>79 minutes</u>

Explanation:

1)<u> Convert the distance, 13.1 km to miles</u>

  • Conversion factor:

        1 = 1 mi / 1.61 km

  • 13.1 km [ 1 mi /  1.61 km ] = 8.1336 mi

2)<u> Use 6.2 mi/h as a converstion factor between distance and time</u>

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3) <u>Convert 1.3124 h to minutes</u>

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Rounding to the nearest minutes (two significant figures):

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4 0
3 years ago
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