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frez [133]
3 years ago
14

How does the size of a nucleus compare to the amount of space that electrons have to orbit around it

Chemistry
1 answer:
Liono4ka [1.6K]3 years ago
8 0
Here's an answer from yahoo

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Fe(NO3)2 not sure how to get the oxidation numbers of all elements
Shtirlitz [24]
You must remember that oxidation number of hydrogen in acids is always +1, oxidation number of oxygen in oxides & acids is always -2... metals has always oxidation number on plus!

group NO3 comes from HNO3...and oxidation number of whole acid group is always on minus and equal to the amount of hydrogen atoms in this acid... so oxidation number of NO3 = -1

we have 2 NO3 groups so 2*(-1) = -2 and that is the reason why oxidation number of Fe in this formula must be +2... because sum of all elements always gives 0!

Now we could count of oxidation number for nitrogen... we write HNO3 and start counting from right to left:
3*(-2) from oxygens + 1 from hydrogen = -5
so nitrogen must have +5 oxidation number... because sum all in formula must be 0.


4 0
2 years ago
Bonds between two atoms that are equally electronegative are _____. bonds between two atoms that are equally electronegative are
DanielleElmas [232]
Bonds between two atoms that are equally electronegative are nonpolar covalent bonds
7 0
3 years ago
Read 2 more answers
C2H5OH(g) + 302(g) → 2CO2(g) + 3H2O(g) + heat<br> reaction type
Tcecarenko [31]

Answer:

Combustion

Explanation:

The reaction type is a combustion reaction;

        Ethanol + oxygen gas  →  carbon dioxide + water

Now;

  Ethanol is the fuel and oxygen gas rapidly combines with it to form carbon dioxide and water.

  • This process releases heat energy from chemical bonds.
  • Most hydrocarbons burn in excess air or oxygen to give carbon dioxide and water.  
5 0
3 years ago
A<br> What is the functional group of propanal?
Harlamova29_29 [7]

Answer:

a

Explanation:

4 0
2 years ago
Read 2 more answers
When iron metal reacts with sulfuric acid, it produces iron (III) sulfate and hydrogen gas. Balance the equation: Fe + H2SO4 → F
mel-nik [20]
<h3>Answer:</h3>

2Fe(s) + 3H₂SO₄ → Fe₂(SO₄)₃ + 3H₂(g)

<h3>Explanation:</h3>

The equation for the reaction between iron metal and sulfuric acid is given by;

Fe(s) + H₂SO₄ → Fe₂(SO₄)₃ + H₂(g)

We are supposed to balance the equation:

What do we mean by balancing a chemical equation?

  • Balancing a chemical equations means that we want to make sure the number of atoms of each element is the same on both sides of the equation.

How is balancing done?

  • Balancing of chemical equations is try and error process that is done by putting appropriate coefficients on the reactants and products to equate the number of atoms of each element.

Why are subscripts on the compounds not changed?

  • Subscripts in a compound show the actual number of atoms of each element in the compound and therefore can never be altered with because it will distort the chemical compound.

Why is it necessary to balance chemical equations?

  • Chemical equations are balanced for them to obey the law of conservation of mass.
  • According to this law, the mass of the reactants should be equal to the mass of products, which is achieved through balancing an equation.

What is the required balanced equation?

  • The equation given can be balanced by putting the coefficients 2, 3, 1, 3 in that order on the reactants and products.
  • Therefore, the balanced chemical equation is;

2Fe(s) + 3H₂SO₄ → Fe₂(SO₄)₃ + 3H₂(g)

6 0
3 years ago
Read 2 more answers
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