The law of multiple proportions is..
Different compounds made of same element have different proportions by mass of those elements.
A loose, icy body with a long, narrow orbit is a comet
Volume of 1 mole of any gas under STP = 22.4 L,
so
0.15 mol*22.4 L/1 mol = 3.36 L of H2
Neon is the element that is classified as a noble gas at STP.
The answer above is correct (I took a test on this)
