Quickly ! what is the density of each of the following gases at stp? show your work.
a. c3h9
b. ne
c. no2

Explanation:

So if we have the molar mass of the gas , just divide it by 22.4 to get the density of that gas.

One mole of a gas at STP has a volume of. 224 L

C3H9

Molecular mass of C3H9 =45.1036 g/mol

Density =mass/volume  

=(45.1036 g/mol)/( 22.4 L/mol)

=2.013 g/l

Ne

Molecular mass of Ne (neon) =0.00060 g/mol

=(0.00060 g/mol)/ (22.4 L/mol)

=0.000026 g/l

Molecular mass of NO2 (nitrogen dioxide)=0.00080 g/mol  

=(0.00080 g/mol )/ (22.4 L/mol)

=0.000035 g/l

The symbol for the element is used to represent the valence electrons of an atom on the outer shell and they are shown as dots. These symbols help visualize whether the atoms and molecules exist as lone pairs or within bonds as the atoms either gains or loses or shares electrons in their valence level in order to achieve stability or complete its valence shell. These symbols are known as Lewis symbols that only show the electrons on the outermost shell as dots.