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zubka84 [21]
3 years ago
10

Convert the following numbers of calories or

Chemistry
1 answer:
muminat3 years ago
7 0

Answer:

a. joules=32823480 , kilojoules=32823.48

b. joules=1979868.8 , kilojoules=1979.8688

c. joules=260002.128 , kilojoules=260.002128

d. joules=180012416 , kilojoules=180012.416

Explanation:

calories to kilo joules=multiply the energy value by 4.184

calories to joules=multiply the energy value by 4184

kilo calories to joules=multiply the energy value by 4184

kilo calories to kilo joules=multiply the energy value by 4.184

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Marta_Voda [28]

Answer:

Mixture

Explanation:

Mixtures are a physical combination of two or more substances. They can be separated based only by physical means.

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3 years ago
On earth, an object that contain more matter than another will always have
Oksanka [162]
It will always have a greater mass

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E ) The distribution coefficient , Ko ( Cether / C water ) , for an organic substance X at room temperature is 13. What relative
TiliK225 [7]

Answer:

Relative volume of ether to water that should be used for the extraction = 1.205

Explanation:

The extraction/distribution coefficient of an arbitrary solvent to water for a given substance is expressed as the mass concentration of the substance in the arbitrary solvent (C₁) divided by the mass concentration of the substance in water (C₂).

K = (C₁/C₂)

Let the initial mass of the organic substance X in water be 1 g (it could be any mass basically, it is just to select a right basis, since we are basically working with percentages here).

If 94% of the organic substance X is extracted by ether in a single extraction, 0.94 g ends up in ether and 0.06 g of the organic substance X that remains in water.

Let the volume of ether required be x mL.

Let the volume of water required be y mL.

Relative volume of ether to water that should be used for the extraction = (x/y)

Mass concentration of the organic substance X in ether = (0.94/x)

Mass concentration of organic substance X in water = (0.06/y)

The distribution coefficient , Ko (Cether / C water), for an organic substance X at room temperature is 13.

13 = (0.94/x) ÷ (0.06/y)

13 = (0.94/x) × (y/0.06)

13 = (15.667y/x)

(x/y) = (15.667/13) = 1.205

Hope this Helps!!!

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Read the list of elements given below.
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Answer:

b All of them are highly reactive nonmetals

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How many minutes will it take for a car to Travel 3.5 miles. If it is traveling 25km/h? (1 mile = 1.609 km) ?
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It will take the car 13.5 minutes to travel 3.5 miles.

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