Light a wooden splint and hold it in some of the unknown gas(which is supposedly hydrogen). If there is a loud "pop" sound, then it is hydrogen. there is a very quick and simple way to do this you have to trap the gas in side a test tube but make sure it is half full of water, trap the gas and if when you turn the test tube upside down and the water stays in the same place the bottom of the tube (which would now be top) then you have "H" HYDROGEN
It is not sure that if gas bubbles are evolving, they must be hydrogen gas.
To check this, you can bring a burning matchstick near the mouth of vessel from which gas bubbles are emerging. If the matchstick burns with a popping sound, then the gas is hydrogen. If not then it not hydrogen.
Collect the gas formed, if it burns with a pop/high pitched screech noise, it's hydrogen.
by using the pop test or lighting a flame near a small amount if you hear a pop then the gas is hydrogen .
H2 is molecular hydrogen. H2S is hydrogen sulfide and is extremely toxic.
Hydrogen is a gas at room temperature and standard pressure.
Hydrogen is a gas at 20 degrees, Fahrenheit and Celsius, but it you are talking Kelvin, then it is a liquid.
hydrogen gas is H2 so it only contains hydrogen. therefore it is an element
H2S stands for Hydrogen Sulphide.It is a gas.
H2 is molecular hydrogen. H2S is hydrogen sulfide and is extremely toxic.
hydrogen and hydrogen gas are same hydrogen is gas
I am unsure what you mean by the formula for Hydrogen and Helium because both are an element, not a compound and you would generally not have a formula for an element. However, I can tell you that the difference between the formula for Hydrogen gas and Helium gas if; Hydrogen gas: H2 H-H Helium gas: He Hope this helps
The reaction produces hydrogen gas as will most reaction between an acid and a metal.
Hydrogen is a gas at room temperature and standard pressure.
Hydrogen gas is an extremely high explosive gas often used to make bombs...
The question as posed has no meaning - nothing spontaneously expands. Hydrogen is, at room temperature, above its Joule-Thompson inversion point. It's hard to tell if that's what you were trying to ask or not.
No, hydrogen gas is a pure substance.
Hydrogen is a gas at room temperature.
Hydrogen is not an elementary gas; hydrogen has a diatomic molecule, H2.
oxygen gas is heavier than hydrogen gas
Hydrogen gas is H2. Oxygen gas is O2.