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3 years ago

Radiation _____.

Chemistry

1 answer:

AURORKA [14]3 years ago

6 0

Answer:

Option (d) is the correct answer.

Explanation:

Radiation is defined as electromagnetic energy that travels in space in the form of waves or particles. This means that heat energy will always travel from a warmer object to a colder object. For example, radiations coming from the Sun are able to transfer heat energy to the substance on which they fall. Thus, we can conclude that radiation is the method of heat transfer used by the Sun.

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A 4 kg rock is rolling 10 m/s. Find its kinetic energy

Pavel [41]

KE = 1/2mv^2
KE = 1/2(4)*10 m/s^2
KE = 2 * 10
KE = 20 joules

Answer: 20 joules

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3 years ago

A biotic factor in a desert ecosystem would be the

valkas [14]

C is correct.

Please vote my answer brainliest. thanks!

6 0

4 years ago

Read 2 more answers

Imagine you are looking at a bottle of salad dressing containing oil, vinegar, and water. Why are there two layers in the salad

Korvikt [17]

Answer:

Oil and vinegar separate because it is a suspension

Explanation:

When you let suspensions sit the particles begin to layer out, in the salad dressing the oil layers out on top of the vinegar. The two layers of oil and vinegar don't actually dissolve in each other. The layer with the lower density (oil) floats on top of the layer with a higher density (vinegar)

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4 years ago

Suppose you have an aqueous solution containing 158.2 g KOHper

postnew [5]

Answer:

1132.8 ml of water

Explanation:

you have an aqueous solution contains 158.2 g KOH per liter

so concentration =158.2/56 = 2.825M

Molarity =2.825

that means you have 2.825 moles of KOH in 1.00L solution

Mass of Soluet(KOH)= 152.8g

Volume of solution= 1.00L

density of solution= 1.13g/cm3 =1.13g/ml

therefore mass of solution = VolumeX density = 1000mL X 1.13g/ml.=1130g

Mass of solvent(water)= mass of solution- mass of solute(KOH)=1130-152.8= 997.2g

Molality= moles of solute/mass of solvent(Kg)

=2.825/(997.2/1000)= 2.832molal

to prepare a 0.250 molal solution of KOH, starting with 100.0ml ofthe orginal solution

0.250*X =2.832 *100

X = 1132.8 ml of water you have to add

4 0

3 years ago

A student needed to dissolve a substance that she knew was soluble in water. according to the chart, which other solvent would m

Dmitry [639]

The chart is attached below and the options are as follow,

A Benzene

B Methanol

C Hexane

D Octane

Answer:
Option-B (Methanol) is the correct answer.

Explanation:
As we know that the substance given to student is soluble in water. Therefore, those substances which are soluble in water are polar in nature because water is polar in nature and Like Dissolves Like.
Hence, in chart it can easily be seen that Methanol is also polar in nature due to presence of -O-H (polar) bond. So, the substance will dissolve in it.

8 0

3 years ago