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4 years ago

How does a thermometer work

1 answer:

8 0

This liquid is sometimes colored alcohol but can also be a metallic liquid called mercury. Both mercury and alcohol grow bigger when heated and smaller when cooled. Inside the glass tube of a thermometer, the liquid has no place to go but up when the temperature is hot and down when the temperature is cold. Mercury is very reactive and works best. But mercury is also very a radioactive element. So, if you break the thermometer, you could get in trouble (radio active posoning) Alcohol work well, it is not radioactive and can't kill you.
Okay, hope I helped
:)))

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Equal molar amounts of H2 and I2 are placed into an evacuated container and heated to 445°C, where the following equilibrium is

Rus_ich [418]

Answer: The initial concentration of $H_2\text{ and }I_2$ are 0.0192 M and 0.0192 M respectively.

Explanation:

We are given:

Equilibrium concentration of HI = 0.030 M

Moles of hydrogen gas = Moles of iodine gas (concentration will also be the same)

For the given chemical equation:

$H_2+I_2\rightleftharpoons 2HI$

Initial: x x -

At eqllm: x-c x-c 2c

Calculating the value of 'c'

$2c=0.030\\\\c=\frac{0.030}{2}=0.015M$

The expression of $K_{eq}$ for above reaction follows:

$K_{eq}=\frac{[HI]^2}{[H_2]\times [I_2]}$

We are given:

$K_{eq}=50.2$

$[H_2]=(x-c)=(x-0.015)$

$[I_2]=(x-c)=(x-0.015)$

Putting values in above equation, we get:

$50.2=\frac{(0.030)^2}{(x-0.015)\times (x-0.015)}\\\\x=0.0108,0.0192$

Neglecting the value of x = 0.0108 M, because the initial concentration cannot be less than the equilibrium concentration.

x = 0.0192 M

Hence, the initial concentration of $H_2\text{ and }I_2$ are 0.0192 M and 0.0192 M respectively.

5 0

3 years ago

The sun emits electromagnetic waves at many frequencies, but mostly in the infrared, visible, and ultraviolet

meriva

The correct answer is radiant, radiant that get transferred into chemical energy

3 0

4 years ago

Read 2 more answers

Describe the structure of the beryllium atom. In your answer make reference to the number of sub-atomic particles and where they

dusya [7]

Answer:

The nucleus consists of 4 protons (red) and 5 neutrons (orange). Four electrons (white) occupy available electron shells (rings). The stability of an element's outer (valence) electrons determines its chemical and physical properties. Subatomic particles are particles that are smaller than the atom. Protons, neutrons, and electrons are the three main subatomic particles found in an atom. Protons have a positive (+) charge. An easy way to remember this is to remember that both proton and positive start with the letter "P."

hope this helped:)

brainliest?

8 0

3 years ago

Describe how a constant volume calorimeter can be used to measure the heat transferred from a burning piece of coal to cool wate

Vlad1618 [11]

Answer:

A Calorimeter is a device used to measure the amount of heat involved in a chemical or physical process.

Explanation:

Ex- when an exothermic reaction ( accompanied by or requiring absorption of heat)occurs in solution in a calorimeter, the heat produced by the reaction is absorbed by the solution increasing its temperature.

- When an endothermic reaction (Heat evolving reaction) occurs, the heat required is absorbed from the thermal energy of the solution, decreasing its temperature.

A burning piece of coal which is releasing heat due to its combustion and is transferred to water.

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7 0

3 years ago

How does gravity affect the rain during a rainstorm?

Advocard [28]

Gravity is the force of attraction between two objects, and Earth's gravity pulls matter downward, toward its center. It pulls precipitation down from clouds and pulls water downhill. Gravity also moves air and ocean water. ... Gravity pulls denser air and water downward, forcing less dense air and water to move upward.

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3 years ago

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