2 years ago

PLEASE ANSWER.

Chemistry

1 answer:

QveST [7]2 years ago

3 0

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Hydrocarbons separated by fractional distillation of petroleum can be cracked to make

lana66690 [7]

Answer:

c.hg cannot be cracked for fractional distillation as there is only one of each

Explanation:

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2 years ago

the pressure in a sealed plastic container is 108 kPa at 41 degrees Celsius. What is the pressure when the temperature drops to

Katarina [22]

<u>Answer:</u> The new pressure will be 101.46 kPa.

<u>Explanation:</u>

To calculate the new pressure, we use the equation given by Gay-Lussac Law. This law states that pressure is directly proportional to the temperature of the gas at constant volume.

The equation given by this law is:

$\frac{P_1}{T_1}=\frac{P_2}{T_2}$

where,

$P_1\text{ and }T_1$ are initial pressure and temperature.

$P_2\text{ and }T_2$ are final pressure and temperature.

We are given:

By using conversion factor: $T(K)=T(^oC)+273$

$P_1=108kPa\\T_1=41^oC=314K\\P_2=?kPa\\T_2=22^oC=295K$

Putting values in above equation, we get:

$\frac{108kPa}{314K}=\frac{P_2}{295K}\\\\P_2=101.46kPa$

Hence, the new pressure will be 101.46 kPa.

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2 years ago

The chemical reaction between the reagents luminol and bleach produces a brief flash of light. Which change would most likely ma

Shalnov [3]

Decrease the temperature

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2 years ago

Which of the answer choices best describes elements?

lianna [129]

It can be a compound or a single element. An element is a pure substance that cannot be separated into simpler substances by chemical or physical means. There are about 117 elements, butcarbon, hydrogen, nitrogen and oxygen are only a few that make up the largest portion of Earth.

I would say d.

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2 years ago

A polyatomic ion contains 18 protons and 20 electrons. the net charge if this ion is ___?

andrew11 [14]

-2 cuz 20 negative minus 18 positive is -2

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1 year ago

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