CHEMISTRY HIGH SCHOOL

the word circuit means ________ therefore a circuit is a ___________ around which electricity or water flows

Answers

Answer 1
Answer:

Answer:

the word circuit means go around therefore a circuit is a closed path around which electricity or water flows

Explanation:

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A solid compound in a sealed container was kept at a very low temperature in a freezer. When placed at room temperature, the substance quickly turned into a liquid. This compound is most likely which of the following?a.an ionic compound because it has a low boiling point b. a covalent compound because it has a low boiling point c.an ionic compound because it has a low melting point d.a covalent compound because it has a low melting point
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Under which conditions will gases best dissolve in liquids?

Answers

Gases best dissolve in liquid under low temperature. This is because when you increase the temperature it will cause an increase in kinetic energy. An increase in kinetic energy means there would be an increase in molecular motion of gas particles. This would cause for gas particles to escape to the gas phase thus making it difficult for it to be dissolved. 

Answer:

when the pressure is low and the temperature is low

Explanation:

Most of the time, combustion reactions occur when hydrocarbons react with what element?

Answers

Answer:

Explanation:

Combustion means the process by which the burning of any substance, whether gaseous, liquid or solid, occurs. In this process, the fuel oxidizes and gives off heat, and, frequently, light.

Combustion reactions are reactions where oxygen intervenes as a reagent. Oxygen has the ability to combine with various elements to produce oxides, where then oxidation is the combination of oxygen with another substance. There are oxidations that are extremely slow, but when oxidation is rapid it is called combustion.

When a substance containing carbon and hydrogen (a hydrocarbon) undergoes complete combustion, or burning, oxygen is consumed and carbon dioxide is produced, and water. Incomplete combustion can also occur when part of the fuel does not react completely because oxygen is not enough.
In a complete combustion reaction compound reacts with an oxidizing element, such as oxygen or fluorine, and the products are compounds of each element in the fuel with the oxidizing.

What happens to a water bottle in a freezer and why

Answers

the water well begin to freeze and turn into soild. why? because the temperature of the the freezer is getting the water bottle cold so when that cold temperature hits that that bottle which has liquid in it so you should know that when liquid is into cold air it well so be soild so when you put the water bottle in the freezer it will be soild. 
and also remember gas - liquid - soild gas change to liquid by hot air  and liuid change to soild by clod air 
hoped i helped 

What kingdom is humans in!

Answers

It is in the Animalia kingdom.
We humans are apart of the animalia kingdom.

A solution was prepared by dissolving 0.42 mol hexane into 500g CCl4. What is the change in freezing point of this solution? The Kf for CCl4 is 30.0oC/m. The freezing point of CCl4 is -22.92 °C.

Answers

Answer:

Freezing T° of solution = - 48.12°C

Explanation:

The colligative which has to be used for this case is the freezing point depresison ( ΔT = Kf . m )

ΔT = Freezing T° of solvent - Freezing T° of solution

Kf = Crysocopic constant

m = molality (mol/kg)

We determine the molality (moles of solute in 1kg of solvent)

We convert the mass of CCl₄ from g to kg → 500 g . 1kg / 1000g = 0.5kg

0.42 mol of hexane / 0.5 kg of CCl₄ = 0.84 mol/kg

Let's replace data: -22.92°C - Freezing T° of solution = 30°C/m . 0.84 m

Freezing T° of solution = - ( 30°C/m . 0.84 m + 22.92°C) → - 48.12°C

The process of boiling a mixture so that one part will evaporate, then cooling or condensing the evaporated liquid, and finally collecting the cooled liquid, is known asa. settling.
b. filtration.
c. distillation.
d. evaporation.

Answers

The answer is C. Distillation. Distillation is a common process for separating liquid mixtures by using the principle of volatility and boiling point. For a liquid mixture with two liquid components A and B, A will have a lower boiling point or higher volatility than B. By boiling the mixture at the boiling point of component A, only component A will evaporate from the mixture. The evaporated gas will then be cooled to condense component A back to a liquid.

The answer would be C. :))
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