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Aleks [24]
3 years ago
8

2. A chemical reaction occurs when substances interact and their atoms

Chemistry
1 answer:
enot [183]3 years ago
4 0

Answer:Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

Explanation:

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A water molecule is made of hydrogen and oxygen atoms and has the same formula is H2O how was the mixture of hydrogen oxygen dif
maksim [4K]

A mixture of hydrogen and oxygen would not need to have a certain ratio of hydrogen atoms to oxygen atoms to differ from the compound known as water.

<h3>Why is water a compound not a mixture?</h3>

A water molecule has 2 hydrogen atoms bonded chemically to oxygen atoms and has the formula H₂O.

In a chemical reaction, two atoms react together chemically to form a new product which means the reactants lose their individual properties and obtain new properties of the product formed.

Hence, water is a compound as hydrogen and oxygen atoms are bonded chemically to each other.

On the other hand, if oxygen and hydrogen form a mixture which is a physical change then they retain their individual properties in the mixture. They do not need to be in a specific ratio and there are no chemical changes taking place.

Chemical change determines if a substance is a mixture or a compound.

Thus, a mixture of hydrogen and oxygen is different from water if it doesn't have a certain ratio of hydrogen atoms to oxygen atoms.

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brainly.com/question/24647756

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2 years ago
Which of the following properties of a gas is explained by the collision of its molecules with the walls of a container?
frez [133]
Pressure is the correct answer in this situation
7 0
3 years ago
If 45 g of O2 gas in a 500 mL container is exerting a pressure of 5.2 atm, what temperature is the gas?
iogann1982 [59]

If 45 g of O2 gas in a 500 mL container is exerting a pressure of 5.2 atm, 22.53K is the temperature in the gas.

<h3>What is an ideal gas equation?</h3>

The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

First, calculate the moles of the gas using the gas law,

PV=nRT, where n is the moles and R is the gas constant. Then divide the given mass by the number of moles to get molar mass.

Given data:

P= 5.2 atm

V= 500 mL =0.5 L

n=?

R= 0.082057338 \;L \;atm \;K^{-1}mol^{-1}

T=?

Moles = \frac{mass}{molar \;mass}

Moles = \frac{45 g}{32}

Moles = \frac{45 g}{32}

Moles = 1.40625

Putting value in the given equation:

\frac{PV}{RT}=n

1.40625= \frac{5.2 \;atm\; X \;0.5 \;L}{0.082057338 \;L \;atm \;K^{-1}mol^{-1} X T}

T= 22.53167034 K= 22.53K

Hence, If 45 g of O2 gas in a 500 mL container is exerting a pressure of 5.2 atm, 22.53K is the temperature in the gas.

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7 0
2 years ago
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