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Nataly_w [17]
3 years ago
7

1. Write a paragraph of 3 lines on how a rainbow form ​

Chemistry
2 answers:
natita [175]3 years ago
8 0

Answer:

Explanation:

A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the Sun.

hoa [83]3 years ago
3 0
A rainbow is a multicolored arc made by light striking water droplets.

The most familiar type rainbow is produced when sunlight strikes raindrops in front of a viewer at a precise angle (42 degrees). Rainbows can also be viewed around fog, sea spray, or waterfalls.

A rainbow is an optical illusion—it does not actually exist in a specific spot in the sky. The appearance of a rainbow depends on where you're standing and where the sun (or other source of light) is shining.

The sun or other source of light is usually behind the person seeing the rainbow. In fact, the center of a primary rainbow is the antisolar point, the imaginary point exactly opposite the sun.
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7 0
3 years ago
How much would the boiling point of water increase if 4 mol of sugar were added to 1 kg of water (Kb = 0.51°C/(mol/kg) for water
andre [41]

Answer : The boiling point of water increases, 2.04^oC

Solution : Given,

Moles of solute (sugar) = 4 moles

Mass of solvent (water) = 1 Kg

K_b=0.51Kg^oC/mole

i = 1 for sugar

Formula used :

\Delta T_b=i\times K_b\times m\\\Delta T_b=i\times K_b\times \frac{n_{solute}}{w_{solvent}}

Where,

\Delta T_b = elevation in boiling point

K_b = elevation constant

m = molality

n_{solute} = moles of solute (sugar)

w_{solvent} = mass of solvent (water)

i = van't Hoff factor

Now put all the given values in this formula, we get the elevation in boiling point of water.

\Delta T_b=(1)\times (0.51Kg^oC/mole)\times \frac{4moles}{1Kg}=2.046^oC

Therefore, the elevation in boiling point of water is 2.04^oC

4 0
4 years ago
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Answer:

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6 0
3 years ago
A teacher wants to preform a class room demonstration that illustrates both chemical and physical changes. which would be the be
sp2606 [1]

Answer:

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Explanation

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Physical part: Melting of the solid wax and evaporation of the liquid forms the physical change.

Chemical part: burning of the wax vapour forms the chemical change.

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3 years ago
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