please help me if you have basic chem knowledge

[Anonymous]

how does h2 and o2 become h2o ?

I don't understand what to even google to learn how to add molecules ?

I want to cry

[Anonymous]

The chemical formula is

2(H202) --> 2(H20) + 02

That's why you see hydrogen peroxide bubbling when you add it to a wound or a stain -- that's the oxygen bubbling away.

[Anonymous]

but i dont understand how you even know

the 2(h202) part ?

how do you get to that

[Anonymous]

Water becomes \(H_{2}O\) when hydrogen and oxygen gases are combined with enough energy, such as a spark or heat, to break their molecular bonds. Two hydrogen molecules (\(2H_{2}\)) react with one oxygen molecule (\(O_{2}\)) to form two water molecules (\(2H_{2}O\)), releasing energy in the process. This is represented by the chemical equation: \(2H_{2}+O_{2}\rightarrow 2H_{2}O\). 

[Anonymous]

Well, it's like an algebraic equation, the two things have to be equal. So if I only had one hydrogen peroxide molecule, it wouldn't be able to split into water because there aren't enough oxygen molecules. So the only way it will work is if you have 2 H202.

[Anonymous]

I'm not sure what you're asking, but briefly two elements oxygen (or O2, which naturally occurs as two oxygen molecules bonded together, meaning they share electrons) and hydrogen (or H2 which also naturally exists as as two H molecules bonded) are exposed to some sort of energy (heat), which breaks the bond between the two oxygen molecules and the bond between the two hydrogen molecules.

Then one oxygen molecule (which is short two electrons, has 6) starts sharing electrons with two hydrogen molecules (which is short one electron, but shares that electron with oxygen, and oxygen shares an electron with each oxygen)

See here:

https://youtu.be/YIkDac_3pSw?si=2Cg-iFJGE5oYm9hb

[Anonymous]

PP with the YouTube link

Balancing equations is the next step - you have to make sure the number and type of elements on one side equal the other.

https://youtu.be/vU7L4yQIxwE?si=mWqcm2DTMBTYRr4L

[Anonymous]

And the poster talking about hydrogen peroxide - take a look at the videos. You're almost there with balancing equations, but not quite.

H2O2 is unstable compared to H2O, so water will form, not hydrogen peroxide

https://www.scientificamerican.com/article/why-does-combining-hydrog/

[Anonymous]

I understand why you are confused. A single molecule of water is H2O. Two hydrogen and one oxygen.

But, in nature, Hydrogen molecule is always found in pairs and Oxygen is also found in pairs. So, if you take 1 oxygen from the pair to make a throuple with a pair of hydrogen, then you will need another pair of Hydrogen for the oxygen that was left from the broken pair.

So, you always need H2, H2 and O2 in nature and some energy or reaction to make two molecules of water. 2 (H20).

[Anonymous]

You need to balance the equation. You need 2 H2 and 1 O2 to get 2 H2O

2 H2 + 1 O2 = 2 H2O

Monotonic hydrogen or oxygen aren't a thing really, so you can't wind up with just start or end with a single H or O on side.

[Anonymous]

Anonymous wrote:

how does h2 and o2 become h2o ?

I don't understand what to even google to learn how to add molecules ?

I want to cry

Chemical bonding.

[Anonymous]

Covalent bonding. Read.

[Anonymous]

Anonymous wrote:

how does h2 and o2 become h2o ?

I don't understand what to even google to learn how to add molecules ?

I want to cry

Don't cry. Only Chem.

[Anonymous]

Oh wait, I'm the first PP and I think I confused OP because I thought they asked how H2O2 became H20. If they meant, how does H2 and 02 become H20, then the answer is:

2(H2) + O2 --> 2(H2O)

The answer is still the same. You need the same number of Hs and Os on either side of the arrow sign, so in this case, you need twice the number of Hydrogens to Oxygens.

No wonder you asked where the heck I got 2(H2O2) from.

[Anonymous]

Anonymous wrote:I understand why you are confused. A single molecule of water is H2O. Two hydrogen and one oxygen.

But, in nature, Hydrogen molecule is always found in pairs and Oxygen is also found in pairs. So, if you take 1 oxygen from the pair to make a throuple with a pair of hydrogen, then you will need another pair of Hydrogen for the oxygen that was left from the broken pair.

So, you always need H2, H2 and O2 in nature and some energy or reaction to make two molecules of water. 2 (H20).

You are an excellent teacher! -np