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3 years ago

What is the oxidation number of an element?

Chemistry

1 answer:

tatiyna3 years ago

7 0

Answer:

Oxidation number is the total number of electrons that an atom either gains or loses in order to form a chemical bond with another atom.

Hope this helps

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What type of bond is formed when an atom of potassium transfers an electron to a bromine atom?

Anna11 [10]

A Polar Covalent Bond is created when the shared electrons between atoms are not equally shared. This occurs when one atom has a higher electronegativity than the atom it is sharing with .

8 0

4 years ago

Methane and oxygen react to form carbon dioxide and water. what mass of water is formed if 0.80 g of methane reacts with 3.2 g o

Charra [1.4K]

1.8 g

<h3>Further explanation</h3>

<u>Given:</u>

0.80 g of methane reacts with 3.2 g of oxygen to produce 2.2 g of carbon dioxide.

<u>Question:</u>

What mass of water is formed?

<u>The Process:</u>

Methane and oxygen react to form carbon dioxide and water. Remember this, the chemical activity that uses oxygen to produce light and heat is also called the combustion process.

In any chemical reaction, the sum of the masses of the reactants is equal to the sum of the masses of the products. That's right, this is called conservation of the masses.

Let us write the word equation of the chemical reaction and then solve the problem following the law of the conservation of mass.

$\boxed{ \ Methane + Oxygen \rightarrow Carbon \ dioxide + Water\ }$

$\boxed{ \ 0.80 \ g \ + \ 3.2 \ g \rightarrow 2.2 \ g \ + \ m_{Water}? \ }$

$\boxed{ \ m_{reactants} = m_{products} \ }$

$\boxed{ \ 0.80 \ g \ + \ 3.2 \ g = 2.2 \ g \ + \ m_{Water} \ }$

Rewrite by rearranging as follows:

$\boxed{ \ 2.2 \ g \ + \ m_{Water} = 0.80 \ g \ + \ 3.2 \ g \ }$

$\boxed{ \ 2.2 \ g \ + \ m_{Water} = 4.0 \ g \ }$

$\boxed{ \ m_{Water} = 4.0 \ g - 2.2 \ g \ }$

Thus the mass of water formed is 1.8 g.

The balanced equation with state symbols is:

$\boxed{ \ CH_4_{(g)} + 2O_2_{(g)} \rightarrow CO_2_{(g)} + 2H_2O_{(l)} \ }$

<u>Notes:</u>

The French scientist Antoine Laurent Lavoisier represented his essential contribution by declaring the law of conservation of mass as one of the fundamental laws in chemistry.
The law of the conservation of the mass states that in a chemical reaction the sum of the masses of the reactants is equal to the sum of the masses of the products. $\boxed{\boxed{ \ m_{reactants} = m_{products} \ }}$

<h3>Learn more</h3>

Flammability as one of the chemical properties brainly.com/question/1767022
Carbon atoms can form four covalent bonds brainly.com/question/3064597
About the solution as a homogeneous mixture brainly.com/question/637791

Keywords: methane and oxygen, react to form carbon dioxide and water, combustion, to produce, the conservation of mass, the word equation, the balanced equation, Lavoisier

3 0

3 years ago

Read 2 more answers

Which element has properties most similar to those of chromium? Why?

Ludmilka [50]

Answer:

Answer : Molybdenum (Mo) and Tungsten (W)

Explanation:

because their properties are similar to that of Chromium (Cr) because it belongs to group 6 in the modern periodic table.

3 0

3 years ago

When hydrogen atoms are energized by electricity, what is observed?

kotykmax [81]

When hydrogen atoms are energized by electricity, an emission spectrum of specific colors occurs because of the different wavelengths.

6 0

3 years ago

The molecule CH₂O contains two single bonds and one double bond. True or false

Tamiku [17]

Answer:

<em>The answer to your question is </em><em>True</em>

Explanation:

CH2O is a polar molecule. It has three polar bonds that are arranged asymmetrically, thus allowing their dipole moments to add up and give the molecule an overall dipole moment. CH2O has a central carbon atom that forms two single bonds with the two hydrogen atoms and a double bond with the oxygen atom.

<u><em>I hope this helps and have a good day!</em></u>

3 0

2 years ago