What is the percent of Li in Li3N ? Please!!
2 answers:
Answer: Li percentage in is 59.8%.
Explanation: The question asks to calculate the mass percentage of Li in .
The formula used for mass percentage of an element in a compound is:
mass percentage =
Atomic mass of Li is 6.94 and atomic mass of N is 14.0.
There are three Li in the given compound. So, the mass of Li in the compound is = 3(6.94) = 20.82
Mass of compound = 20.82 + 14.0 = 34.82
Mass percentage of Li = = 59.8%
Hence, the percentage of Li in is 59.8%.
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This is an incomplete question, the given sketch is shown below.
Answer : The name of given unit cell is, FCC (face-centered cubic unit cell)
Explanation :
Unit cell : It is defined as the smallest 3-dimensional portion of a complete space lattice which when repeated over the and again in different directions produces the complete space lattice.
There are three types of unit cell.
- SCC (simple-centered cubic unit cell)
- BCC (body-centered cubic unit cell)
- FCC (face-centered cubic unit cell)
In SCC, the atoms are arranged at the corners.
The number of atoms of unit cell = Z = 1
In BCC, the atoms are arranged at the corners and the body center.
The number of atoms of unit cell = Z = 2
The given unit cell is, FCC because the atoms are arranged at the corners and the center of the 6 faces.
The number of atoms of unit cell = Z = 4
Thus, the name of given unit cell is, FCC (face-centered cubic unit cell)
