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Bess [88]
3 years ago
9

What is the source for the ultraviolet radiation in earths atmosphere

Chemistry
1 answer:
rodikova [14]3 years ago
6 0
The source for the ultraviolet (UV) radiation in Earth's atmosphere is the Sun. Despite the ultraviolet radiation, the Sun <span>emits also other kinds of electromagnetic </span>radiation<span>, visible light (99% of its </span>rays ) and <span>infrared </span>rays (also known as heat). The UV radiation<span> is absorbed in the ozone layer of the atmosphere before reaching the Earth.</span>
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3 years ago
Determine the oxidation states of the elements in the compounds listed. None of the oxygen-containing compounds are peroxides or
natka813 [3]

Answer:

Explanation:

You need to remember that the oxidation number of H is +1, except when it is in a metal hydrites like NaH, where its oxidation number is -1. Then, the oxidation number of O is -2, but in peroxides is -1. So with these rules you just have to multiply the ox. number with the name of atoms and all the elements in the reaction must sum 0.

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4 years ago
An arctic weather balloon is filled with 22.6L of helium gas inside a prep shed. The temperature inside the shed is 7°C. The bal
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Answer : The new volume of the balloon is, 22.4 L

Explanation :

Charles' Law : It is defined as the volume of gas is directly proportional to the temperature of the gas at constant pressure and number of moles.

V\propto T

or,

\frac{V_1}{V_2}=\frac{T_1}{T_2}

where,

V_1 = initial volume of gas = 22.6 L

V_2 = final volume of gas = ?

T_1 = initial temperature of gas = 7^oC=273+7=280K

T_2 = final temperature of gas = 5^oC=273+5=278K

Now put all the given values in the above formula, we get the final volume of the gas.

\frac{22.6L}{V_2}=\frac{280K}{278K}

V_2=22.4L

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4 0
4 years ago
Q.1 What is one joule work ? ​
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Answer:

See below.

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8 0
3 years ago
Read 2 more answers
How would you prepare 100.0 mL of 0.400 M CaCl2 from a stock solution of 2.00 M CaCl2?
Sever21 [200]

Answer:

Measure 20mL of the stock

Explanation:

All we need to do is to find the volume of the stock solution needed. This is illustrated below:

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C1V1 = C2V2

2 x V1 = 0.4 x 100

Divide both side by 2

V1 = ( 0.4 x 100) /2

V1 = 20mL

Therefore, to prepare the solution, we will measure 20mL of the stock solution and make it up to the 100mL mark.

4 0
3 years ago
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