Yes, elements can be separated from compounds. It takes a reaction of some kind; i.e., they can not be separated by physical means.
The gas, H2, is lighter than air; therefore, holding the tube upright with no stopper and the gas will float out. Holding the tube upside down, with no stopper, and the gas will not float down. :-).
I don't know what your reaction was. It's possible you reacted an acid with a base; if that's the case the H came from the acid and the OH came from the base. If you explain what you did I can be more specific.
I don't understand the last question. Perhaps you can give additional information.
Can an element be separated from a compound? Can an element form a compound?
The reaction of zinc metal and hydrochloric acid creates hydrogen gas, an element. if we create this element in a tube what property of this element requires us to keep the tube upside down?
Water has the chemical formula h2o. Where did the hydrogen and oxygen atoms required to form the water molecules come from?
Explain why it might be possible to have a successful test for hydrogen but no water detected in the test tube?
These r my only questions I'm stuck on please help:)
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I think the last question means if we test hydrogen in a tube, y is there no water in it? I don't know wut the question means either and thank u for ur help:)
When you have H2 gas in a tube and you test it, you usually ignite the H2 gas with a flame. The reaction is
2H2 + O2 ==> 2H2O. I expect that you SEE no H2O because the combustion gives a gas (steam) and you don't see that. But it's there. Perhaps if you cooled the tube before ignition, the steam would then condense on the cooler walls of the container and you would be able to see it.
2H2 + O2 ==> 2H2O. I expect that you SEE no H2O because the combustion gives a gas (steam) and you don't see that. But it's there. Perhaps if you cooled the tube before ignition, the steam would then condense on the cooler walls of the container and you would be able to see it.
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