Q6) Ahmad has two unlabeled balloons, one filled with hydrogen gas and the second filled with neon gas.
Densities
How dense is that gas?
Density at
Gas
0°C and
1 atm (g/L)
Argon, Ar
1.784
Carbon dioxide, CO, 1.977
Helium, He
0.1786
Nitrogen, N
1.251
Oxygen, o,
1.429
Hydrogen
0.08988
Neon-
0.900 TL
I
TO
He places both balloons in a chamber of Helium to help him identify
neon and hydrogen.
a.
Predict what will happen to help Ahmed identify the element
in each of the balloons when it is placed in Helium. Explain your
answer. Give your evidence

The lights used by mark watley (played by matt damon) during the film the martian seem to be metal halide lamps. metal halide lamps are filled with vaporized mercury and metal-halogen compounds. when an electric current is passed through the lamp, the tube begins to glow a bright white/blue color. if you were to pass this light through a prism to separate the individual light frequencies, you would see a rainbow just as you would if using natural sunlight because of the complexity of the metal halide gas and the vast amount of possible electron transitions. (the study of light in this way is known as spectroscopy and allows astronomers to know exactly what atoms compose distant stars, simply by looking at the light they emit. the spectral lines an atom produces uniquely identifies that atom just like a fingerprint uniquely identifies a person. the momentum equation and energy equation that we have used above can be combined to give the following equation: c = e p where again p is the phonon momentum, e is the photon energy and c is the speed of light. when you divide the photon energy found in #6 by the photon momentum found in #4, do you get the speed of light? (if not, check your work for questions #4 through #6). yes no

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