Water, Methane , Ammonia.
The human body.
Natural gas for heating/cooking.
Saturated fat, petrol, diesel, kerosene and all other baisic oil derivetives.
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Common hydrogen and at very high pressure hydrogen turns metallic (beta-hydrogen)
"Common salt", with the chemical formula NaCl, does not contain any hydrogen. The much larger chemical class of "salts" includes some examples that do contain hydrogen, for example the ammonium salts.
Elements can form together to create atoms. Everything is made up of atoms, so technically everything has elements. If you are wondering what household items have chemicals then again the answer is pretty much everything but some example are salt, which is sodium chloride (a compound made of Sodium and Chlorine) or Bleach often containing sodium hypochlorite, hydrogen peroxide, sodium perborate, etc.
When you add a metal to an acid, it creates two items. It creates a type of metallic salt and it creates some hydrogen gas.
There are many common household items which contain hydrogen cyanide, however the toxic substance isn't usually released unless the items are burned. Some of the items which contain hydrogen cyanide are mattresses, upholstery, and carpeting.
ammonia, hydrogen peroxide
Yes, you can make hydrogen from water. If you go to the link below, you can see how to make hydrogen (and oxygen) from water using (mostly) common household items.
Common household items that begin with the letter r:radioraincoatrefrigeratorrevolverribbonringroberougeruler
Examples: sodium chloride, sodium carbonate, sodium hydrogen carbonate, sodium hydroxide, sodium sulfide, sodium acetate, sodium bromide, borax, etc.
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Umbrella, underwear, uniform and utensils are common household items. They begin with the letter u.
Some of the soluble household items are bleach, salt and sugar. They are common items in the kitchen and for doing laundry.
Salt and ice are two common mineral crystals.
No, water (H2O) is the most common oxide of hydrogen.
There are many common household base compounds formed from nitrogen and hydrogen. Some of them include hydrogen peroxide, household dyes, cleaning agents and so much more.