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marshall27 [118]
3 years ago
7

Explain how the addition of thermal energy (heat) from matter affects its particles

Chemistry
1 answer:
MakcuM [25]3 years ago
8 0

Answer:

when a substance is heated it gains thermal energy. Therefore its particles move faster and its temperature rises. when a substance is cool it loses thermal energy which causes its particles to move more slowly and its temperature to drop

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Why are you more likely to become dehydrated in hot weather?
Solnce55 [7]

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sweat

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you get dehydrated in hot weather because your body will release sweat to try and keep you cool

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I have no idea what to put, pls help, due tmr<br>(science)​
rodikova [14]

Answer:

It traveled for 4 seconds at a distance of about 4.1 meters. With a velocity of 10%.

Explanation:

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3 years ago
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ddd [48]

Explanation:

Uranium-238 undergoes a radioactive decay series consisting of 14 separate steps before producing stable lead-206. This series consists of eight α decays and six β decays.

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What characteristic bright line spectrum of an elementforced when electrons?
emmasim [6.3K]

The characteristic bright-line spectrum of an element is produced when its electrons return to lower energy levels To be in the ground state all electrons must be in their lowest energy state; all excited atoms must lose energy. The lost energy appears in the form of light. Hope this helped :)
8 0
3 years ago
A hydrocarbon is burnt completely to give 3.447g of
goblinko [34]

<u>Answer:</u> The empirical formula for the given compound is CH_2

<u>Explanation:</u>

The chemical equation for the combustion of compound having carbon, hydrogen, iron and oxygen follows:

C_xH_y+O_2\rightarrow CO_2+H_2O

where, 'x' and 'y'  are the subscripts of carbon and hydrogen respectively.

We are given:

Mass of CO_2=3.447g

Mass of H_2O=1.647g

We know that:

Molar mass of carbon dioxide = 44 g/mol

Molar mass of water = 18 g/mol

<u>For calculating the mass of carbon:</u>

In 44g of carbon dioxide, 12 g of carbon is contained.

So, in 3.447 g of carbon dioxide, \frac{12}{44}\times 3.447=0.940g of carbon will be contained.

<u>For calculating the mass of hydrogen:</u>

In 18g of water, 2 g of hydrogen is contained.

So, in 1.647 g of water, \frac{2}{18}\times 1.647=0.183g of hydrogen will be contained.

To formulate the empirical formula, we need to follow some steps:

  • <u>Step 1:</u> Converting the given masses into moles.

Moles of Carbon =\frac{\text{Given mass of Carbon}}{\text{Molar mass of Carbon}}=\frac{0.940g}{12g/mole}=0.0783moles

Moles of Hydrogen = \frac{\text{Given mass of Hydrogen}}{\text{Molar mass of Hydrogen}}=\frac{0.183g}{1g/mole}=0.183moles

  • <u>Step 2:</u> Calculating the mole ratio of the given elements.

For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 0.0783 moles.

For Carbon = \frac{0.0783}{0.0783}=1

For Hydrogen = \frac{0.183}{0.0783}=2.34\approx 2

  • <u>Step 3:</u> Taking the mole ratio as their subscripts.

The ratio of C : H = 1 : 2

Hence, the empirical formula for the given compound is CH_2

8 0
3 years ago
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