It doesnt look like anything as it is invisible so its image cannot be percieved. Unless you tried to cool it slightly to like -100+ for it to condense into a slightly condensed vapour and it would appear much like steam does but that's really its liquid form just in small droplets and it would be very cold.
It is a colourless gas.
2Na + 2H2O--->H2+ 2NaOH Hydrogen gas is diatomic, therefore it requires a subscript of 2.
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.
it looks like a space filling model .This shows the realistic representation of hydrogen and how closely bonded they are.
At a constant temperature and pressure a mole of any gas has the same volume. So all you need to know to answer this question is that there are two atoms of hydrogen in a molecule of hydrogen gas and three atoms of hydrogen in a molecule of ammonia gas. 13.7 L * 2/3 = 9.13 L. You can check this by plugging the values into the ideal gas equation, pV = nRT (look on Wikipedia for "Ideal gas law")
It is transparent and colorless, you can't see it.
Hydrogen sulphide, H2S, is a colorless and poisonous flammable gas.
gas LOOK AT A Periodic Table!
Hydrogen is an element. It can exist as a gas, as molecules of H2, but also as compounds, like water, H2O.
2Na + 2H2O--->H2+ 2NaOH Hydrogen gas is diatomic, therefore it requires a subscript of 2.
gas LOOK AT A PERIODIC TABLE!
You can lower the density of hydrogen (or any) gas by heating it in a container where it is free to expand, like a balloon.
gas- helium & hydrogen
Advantage - It provided more lift than helium. Disadvantage - It was highly flammable. hydrogen's flames are colourless but look like fireworks
Not at all. Hydrogen is a very low-density highly flammable gas.
No, The nebula is an interstellar cloud of dust, hydrogen gas, helium gas and plasma. Look on Wikipedia.
The reaction produces hydrogen gas as will most reaction between an acid and a metal.