# What is percentage composition of element by mass in the lithium nitride salt, #Li_3N#?

##### 3 Answers

The metal has approx.

#### Explanation:

And thus

The mass percentage of

#### Explanation:

The obtain the mass percentage of

mass

mass

Therefore the mass of

Now to obtain the mass percentage of

#### Explanation:

Find the mass of 3 atoms of lithium:

#3"Li" * 6.941 color(white)".""amu" = 20.823 color(white)".""amu"#

Find the mass of 1 atom of nitrogen:

#1 "N" * 14.0067 color(white)".""amu" = 14.0067 color(white)".""amu"#

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Now use the formula:

#% "mass" = "part"/"whole"times100%#

For Lithium:

#%"Li" = 20.823/(20.823+14.0067) = 59.8%#

For Nitrogen:

#%"N" = 14.0067 / (20.823+14.0067) = 40.2%#

*Final Answer*