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zzz [600]
2 years ago
13

Which of the following describes a unique property of water that helps sustain marine life?

Chemistry
1 answer:
LUCKY_DIMON [66]2 years ago
6 0

Answer:

B

Explanation:

Since ice is less dense than water, it floats. This forms an ice cover sheet in cold regions such as in the poles. This insulates the water beneath from excessive heat loss hence preventing it from turning into ice too, This protects the marine life beneath. Also, water does not gain heat or loss it rapidly (due to its high heat capacity) hence offering a more or stable temperature range for marine life.

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Which of the two substances would have a higher melting point: O2 or quartz (SiO2)n? Explain your answer.
sesenic [268]

Answer:

quartz (SiO2)n

Explanation:

Melting point is defined as the temperature or point at which the substances change its state from solid to liquid.

Quartz (SiO2)n has high melting point than O2 because Quartz (SiO2)n is found in the form of hard, crystalline mineral that is made up of silicon and oxygen atoms having strong covalent bonds between all the atoms. So, a lot of energy is required to break the bond between the atoms and it has a high melting point.

Hence, the correct answer is quartz (SiO2)n.

7 0
2 years ago
4.5x10'25 atoms of nickel equal how many moles
olga2289 [7]
1 mole of any particles = 6.02* 10²³ particles

4.5*10²⁵ atoms Ni* 1 mol Ni/6.02*10²³ Ni ≈ 74.75≈ 75 mol Ni
 
8 0
2 years ago
The chemical properties of an atom are related to the number of its what
RideAnS [48]
The properties of the electrons of an atom are determined in large part by the number of protons presented in the nucleus of the atom
7 0
3 years ago
Read 2 more answers
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snow_lady [41]

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4 0
3 years ago
Do all dipole-dipole forces have the same strength?
n200080 [17]
Inter molecula force 
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6 0
3 years ago
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