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love history [14]
3 years ago
11

Drag the description to the category

Chemistry
1 answer:
viktelen [127]3 years ago
5 0

Answer:

ok

Explanation:

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Calculate the boiling point (in degrees C) of a solution made by dissolving 7 g of naphthalene {C10H8} in 14.4 g of benzene. The
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Answer:

The boiling point = 89.69 °C

Explanation:

Step 1: Data given

Mass of naphthalane = 7.0 grams

Mass of benzene = 14.4 grams

The Kbp of the solvent = 2.53 K/m

The normal boiling point is 80.1°C

Naphthalene, C10H8 , is a non-electrolyte, which means that the van't Hoff factor for this solution will be 1

Step 2: Calculate moles naphthalene

Moles naphthalene = mass / molar mass

Moles naphthalene = 7.0 grams / 128.17 g/mol

Moles naphthalene = 0.0546 moles

Step 3: Calculate molality

Molality = moles naphthalene / mass water

Molality = 0.0546 moles / 0.0144 kg

Molality = 3.79 molal

Step 4:

ΔT = i*Kb*m

ΔT = 1*2.53 K/m * 3.79 molal

ΔT = 9.59 °C

The boiling point = 80.1 °C + 9.59 °C  = 89.69 °C

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3 years ago
What kind of reaction is represented by the dancing figures?
Darina [25.2K]
C - single replacement reaction
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3 years ago
2. Food is another concern before the trip begins. Everyone has become accustomed to a 1500 calorie diet due the food
fomenos

About 46.1 pounds of apple would be needed per day of the trip.

I managed to extract the complete scenario from the attached image.

The trip is made up of 4 men and 3 women, making a total of 7 people.

Everyone has become accustomed to 1500 calories per day.

The total calories needed per day for 7 persons = 1500 x 7

                           = 10,500 calories

189 g of apple has only 95 calories, what g of apple will produce 10,500 calories?

                 = 10,500 x 189/95 = 20,889.67 g of apple

From conversion:

1 g = 0.00220462 pounds

20,889.67 g = 20,889.67 x 0.00220462

                         = 46.1 pounds of apple

More about dimensional analysis can be found here: brainly.com/question/22015862

8 0
3 years ago
Observations of the solar system support the nebular theory because
motikmotik

Answer:

Because all the planets orbit the sun in the same direction, along a circular flattened disk.

Explanation:

You're welcome bro, sorry for the late answer

6 0
4 years ago
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What are the different characteristics that can be used to identify an unknown mineral
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These are just a couple ways to identify unknown minerals,touch taste smell 

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4 years ago
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