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monitta
3 years ago
13

20 points will favor answer Please guys i could really use some help on this question

Chemistry
1 answer:
posledela3 years ago
8 0
Answer : Option B) <span>The oxygen in the air forms ozone in presence of UV rays

Explanation :
The other given options for the chemical change seems to be irrelevant as the option A which converts  water into different forms can be called as physical change, option C only dust and soot particle are released in air where no new substance is formed And in option D sulfur dioxide is getting released into air which is also a form of a physical process.

So in option B we can see a new compound getting formed which is ozone in presence of UV rays hence it is a chemical change.</span>
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MrRa [10]

Answer:

I am pretty sure it is a watershed

Explanation:

5 0
3 years ago
Plzz help in this i have an exam today​
Zielflug [23.3K]

Answer:

a and c are reduction

b and d are oxidation

8 0
3 years ago
As the temperature of a medium increases, the speed of the sound wave
Irina-Kira [14]

Answer : As the temperature of a medium increases, the speed of the sound wave increases because the particles bump into each other more often.  

Explanation :

The dependency of the speed of the sound wave and the temperature of the medium is :

v=\sqrt{\gamma\ R\ T}

Where

\gamma = ratio of specific heat

R is gas constant

T is the temperature

The speed of the wave is directly proportional to the temperature. As the temperature of a medium increase, the speed of the sound increase. The particles start vibrating faster. Hence, they bump into each other.

Hence, the correct option is (A).

8 0
3 years ago
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Which element easily loses one electron to form a positive ion? (AKS 1c/DOK 1)
Lena [83]

Answer:

Potassium

Explanation:

It's in group 1 in the periodic table of elements

8 0
3 years ago
What are some pros and cons of endoskeletons and exoskeletons
xenn [34]
Endoskeleton
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Change those up for exoskeletons.. pros for cons and cons for pros
3 0
3 years ago
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