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denis23 [38]
3 years ago
14

BRAINLIEST

Chemistry
2 answers:
Stells [14]3 years ago
8 0

Answer:

Option (2)

Explanation:

In ocean water body, the upper surface of the water body is heated up due to the absorption of heat energy, as a result of which the temperature of the upper surface of the water body increases. With the increase in depth, the temperature gradually decreases, due to the lesser penetration of sunlight into the deeper water. So, the temperature and depth are inversely proportional to each other.

With the increase in the depth, and decrease in the temperature, it results in the increase in density. It is because the warmer water are less denser than the cold water, and this cold water are present at the bottom of the ocean. This cold water is comparatively rich in the salt content that increases its density.

So, it can be concluded that, as the depth of the ocean water body increases and the temperature decreases, the density increases.

Thus, the correct answer is option (2).

Kamila [148]3 years ago
6 0
The density increases.

Explanation:
As you go deeper in depth, pressure increases. Density = mass/volume. The layers beneath us due to pressure get packed to the point of being very dense.
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Explanation:

Hello there!

In this case, according to the equation for the calculation of the total heat of reaction when a fixed mass of a fuel like ethane is burnt, we can write:

Q=n*\Delta _cH

Whereas n stands for the moles and the other term for the enthalpy of combustion. Thus, for the required total heat of reaction, we first compute the moles of ethane in 3 g as shown below:

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Next, we understand that -337.0kcal is the heat released by the combustion of 1 mole of ethane, therefore, to compute Q, we proceed as follows:

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Best regards!

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