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3 years ago

Which of the following is the correct definition of convection?

Chemistry

2 answers:

Paraphin [41]3 years ago

8 0

Answer:

A: The transfer of heat by currents.

Explanation:

Convection is the transfer of heat by currents, typically within a liquid or a gas. When heat is transferred by convection, matter flows.

kvv77 [185]3 years ago

3 0

Answer: A. the transfer of heat by currents

Explanation: There are three modes of heat transfer:

1) Conduction: This type of heat transfer happens when there is direct contact between the two object. Example: heating a pan on stove.

2) Convection: This type of heat transfer happens when there is a movement of fluid (liquid or gas) due to the movement of hot layers to the top and cold layers to the bottom which leads to convection currents. Example: Heating of swimming pool.

3) Radiation: This type of heat transfer happens when there is direct transfer of energy through space. Example: Heating of earth's surface.

B. The transmission of heat across matter is conduction.

C. The electromagnetic radiation from the surface of an object which is due to the object's temperature is radiation.

D. The transmission of heat across empty space is radiation.

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In an electron-dot structure of an element, the dots are used to represent ________.

Vlad [161]

Dots are used to represent electrons.

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3 years ago

What volume of concentrated (10.2 M) HCl would be required to prepare 1.11 x 104 mL of 1.5 M HC1? Enter your answer in scientifi

Tomtit [17]

Answer:

The required volume is 1.6 x 10³mL.

Explanation:

When we want to prepare a dilute solution from a concentrated one, we can use the dilution rule to find out the required volume to dilute. This rule states:

C₁ . V₁ = C₂ . V₂

where,

C₁ and V₁ are the concentration and volume of the concentrated solution

C₂ and V₂ are the concentration and volume of the dilute solution

In this case, we want to find out V₁:

C₁ . V₁ = C₂ . V₂

$V_{1} = \frac{C_{2}.V_{2}}{C_{1}} = \frac{1.5M \times1.11.10^{4}mL }{10.2M} =1.6\times10^{3} mL$

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3 years ago

If you are told that one of them is Cr2O3 and the other is OsO4, which one do you expect to be the yellow solid?

Katen [24]

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Is the following relation a function?

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Answer:

Explanation:

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2 years ago