1 files changed, 20 insertions, 0 deletions
diff --git a/3755/CH2/EX2.20/Ex2_20.sce b/3755/CH2/EX2.20/Ex2_20.sce
new file mode 100644
index 000000000..c47f09be2
--- /dev/null
+++ b/3755/CH2/EX2.20/Ex2_20.sce
@@ -0,0 +1,20 @@
+clear
+//
+//
+//
+
+//Variable declaration    
+a=0.27*10^-9;    //lattice constant(m)
+c=0.494*10^-9;    //height of cell(m)
+M=65.37;         //atomic weight
+N=6.023*10^26;      //avagadro number
+n=6;     //number of atoms
+
+//Calculations
+V=3*sqrt(3)*a^2*c/2;      //volume of unit cell(m^3)
+rho=n*M/(N*V);    //density of zinc(kg/m^3)
+
+//Result"
+printf("\n volume of unit cell is %0.3f *10^-29 m^3",V*10^29)
+printf("\n density of zinc is %0.0f kg/m^3",rho)
+printf("\n answer in the book is wrong")