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Sauron [17]
3 years ago
11

Where is Ozone found in the atmosphere and why is it crucial to human life ?

Chemistry
1 answer:
Oliga [24]3 years ago
8 0

Explanation:

Ozone is 10 miles above the Earth's stratosphere. It's crucial to human life because it protects us against the sun's harsh ultraviolet rays. Without protection, they cause skin cancer.

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Which phase is heat energy being released?
scZoUnD [109]

The answer is B
Vaporization
6 0
3 years ago
How many milliliters of 0.258M NaOH are required to completely neutralize 2.00 g of acetic acid HC2H3O2?
madam [21]

Answer:

0.129 L = 129.0 mL.

Explanation:

  • NaOH neutralizes acetic acid (CH₃COOH) according to the balanced reaction:

<em>NaOH + CH₃COOH → CH₃COONa + H₂O.  </em>

  • According to the balanced equation: 1.0 mole of NaOH will neutralize 1.0 mole of CH₃COOH.  

<em>no. of moles of CH₃COOH = mass/molar mass </em>= (2.0 g)/(60 g/mol) = <em>0.033 mole.  </em>

<em> </em>

  • For NaOH:

no. of moles = (0.258 mol/L)(V)

  • At neutralization: no. of moles of NaOH = no. of moles of CH₃COOH  

∴ (0.258 mol/L)(V) = 0.033 mole

<em>∴ The volume of NaOH</em> =  (0.033 mole)/(0.258 mol/L) = <em>0.129 L = 129.0 mL.</em>

8 0
4 years ago
What is significant about the temperature absolute zero?
Reptile [31]

Explanation:

The absolute temperature is the lowest possible temperature in the universe. At this temperature, all atoms become motionless and cease to move.

The value of the absolute zero is pegged at -273.16°C.

  • It is the lowest limit of the coldness of a body.
  • Nothing can be colder than a body at absolute temperature.
  • Many researches are underway to take advantage of this temperature value for scientific purpose.
  • Thermodynamically, all process stops at this temperature.
  • When a body is brought close a body at absolute zero, it can suffer cryogenic burn due to heat transfer.
4 0
3 years ago
How are period and frequency related to each other?
frosja888 [35]

Answer:

D. period is reciprocal of frequency.

Explanation:

4 0
4 years ago
Read 2 more answers
A sample of matter is at extreme temperatures with particles moving so quickly that their collisions release electrons from the
Angelina_Jolie [31]
<h2>Answer:</h2>

The phase of matter will be known as the forth phase of matter, plasma.

<h3>Explanation:</h3>

There are 4 phases of matters:

  • Gas: The freely moving molecules, having no definite volume and shape.
  • Liquid: The loosely bonded molecules, having a definite volume but not shape.
  • Solid: Highly packed molecules with definite volume and shape.
  • Plasma: The more like gases phase, containing freely moving electrons and positive ions.

Hence according to the question description and given above matter phases, the phase of that sample will be plasma.

4 0
3 years ago
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