Short Answer TypeCalculate the packing efficiency of a metal crystal for a simple cubic lattice.
In a simple cubic lattice, the particles are located only at the corners of the cube and touch each other along the edge.
In a simple cubic lattice, the particles are located only at the corners of the cube and touch each other along the edge.
Let the edge length of the cube be ‘a’ and the radius of each particle be r.
So, we can write:
a = 2r
Now, volume of the cubic unit cell = a3 = (2r)3 = 8r3
We know that the number of particles per unit cell is 1.
Therefore, volume of the occupied unit cell = 
Explain how you can determine the atomic mass of an unknown metal if you know its mass density and the dimensions of a unit cell of its crystal.
Differentiate between molarity and molality values for a solution. What is the effect of change in temperature on molarity and molality values?
The thermal decomposition of HCO2H is a first-order reaction with a rate constant of 2.4 x 10-3 s-1 at a certain temperature. Calculate how long will it take for three-fourths of the initial quantity of HCO2H to decompose.
(log 0.25 = - 0.6021)
What do you understand by the rate law and rate constant of a reaction?
Identify the order of a reaction if the units of its rate constant are:
(i) L-1 mol s-1
(ii) L mol-1 s-1Describe the principle controlling each of the following processes:
(i) Preparation of cast iron form pig iron.
(ii) Preparation of pure alumina (Al2O3) from bauxite ore.
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