CHEMISTRY HIGH SCHOOL

Which of the following is not a form of heat transfer?A. radiation
B. convection
C. conduction
D. vaporization

Answers

Answer 1
Answer: D. Vaporization is not a form of heat transfer. Vaporization refers to a phase change in which a substance changes from a liquid state of matter to a gaseous state.

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Electrical motors work based on the fact that a wire carrying current can produce a ______________ field, which can lead to production of mechanical energy through rotation. A gravitational B parallel C magnetic D alternating

Answers

It’s C magnetic field because with the forces of the magnets pushing against each other it gets the engine to start turning the wheels.

Select the sentence that best describes why copper and some other metals are good conductors.Answer

Copper atoms have loosely held electrons; this means they can freely move in and out of the nucleus of the atom.

Copper atoms have a loosely held free electron in their outer shell that is able to move freely to other atoms.

Copper and some other metals have highly active inner shells. This means that electrons can be freely exchanged between shells.

Copper has a small number of electrons; this means it can easily shed these electrons and take electrons from other atoms.
...?

Answers

The correct answer for this question would be the second option. The statement that t describes why copper and some other metals are good conductors is that copper atoms have a loosely held free electron in their outer shell that is able to move freely to other atoms. Hope this answer helps.

Answer: Option (b) is the correct answer.

Explanation:

Electronic configuration of copper is [Ar]4s1 3d^(10) and copper is known as the best conductor of heat and electricity.

This is because in copper there is availability of free electrons in its valence shell (outermost shell).  

And, as it is known that electricity is the flow of electrons. This means that since copper metal contains a number of free electrons. Hence, it can easily conduct electricity.

Thus, we can conclude that copper and some other metals are good conductors because copper atoms have a loosely held free electron in their outer shell that is able to move freely to other atoms.

Which element, represented by X, reacts with fluorine to produce the compound XF2?(1) aluminum (3) magnesium
(2) argon (4) sodium

Answers

The answer is (3) magnesium. Aluminum usually has valence of +3 and Sodium usually has valence of +1. Argon is usually not react with others. Because it is already stable with 8 electrons at the outer shell.

The molar mass of I2 is 253.80 g/mol, and the molar mass of NI3 is 394.71 g/mol. How many moles of I2 will form 3.58 g of NI3?

Answers

The balanced chemical reaction is:

N2 +3 I2 = 2NI3

We are given the amount of product formed. This will be the starting point of our calculations.

3.58 g NI3 ( 1 mol NI3 / 394.71 g NI3 ) ( 3 mol I2 / 2 mol NI3 ) = 0.014 mol I2.

Thus, 0.014 mol of I2 is needed to form the given amount of NI3.

Answer:

Answer is 0.0136.

Explanation:

The atoms in a sample are close together but can slide past one another. As the atoms lose energy, they move slower. The atoms become locked in place because of attractive forces between them.Which change of state is taking place?

gas to solid
gas to liquid
liquid to solid
solid to liquid

Answers

Answer:

liquid to solid

Explanation:

Answer:

liquid to solid

Explanation:

I got it right in edge

Which element has the electron configuration [Xe] 6s2 4f14 5d10 6p2?

Answers

The electron configuration of lead is [Xe] 6s2, 4f14, 5d10, 6p2 according to the Aufbau principle.
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