--Given Values--
Atomic Radius (nm) = 0.116
FCC Metal = Gold
BCC Metal: = Sodium
Temperature ( C ) = 1017
Metal A = Tin
Equilibrium Number of Vacancies (m^-3) = 6.02E+23
Temperature for Metal A = 369
Metal B = Gallium

I need help with 3, 4, 6, 7, 11, 12. Am I entering the notationsincorrectly?

) If the atomic radius of a metal is the value shown above andit has the face-centered cubic crystal structure, calculate thevolume of its unit cell in nm³? Write your answers inEngineering Notation.  
        Your Answer =Correct! ExactAnswer= 35.3E-3 +/- 1.00E-03%
2) What is the atomic packing factor for the BCC crystalstructure?  
        Your Answer = Correct!
3) Find the theoretical density for the FCC Element shown above ing/cm³. Write your answer to the ten thousandths place(0.0000):  
        Your Answer =Incorrect.
4) Calculate the atomic radius, in nm, of the BCC Metal aboveutilizing the density and the atomic weight provided by examinationbooklet - Write your answer with 4 significantfigures:  
        Your Answer =Incorrect.
5) Calculate the fraction of atom sites that are vacant for copper(Cu) at the temperature provided above. Assume an energy forvacancy formation of 0.90 eV/atom:  
        Your Answer =Correct! ExactAnswer= 3.05E-04 +/- 1.00E-05%
6) Repeat the calculation in question 5 at room temperature (25C):  
        Your Answer =Incorrect.
7) Calculate the energy (in eV/atom) for vacancy formation for theMetal A and the equilibrium number of vacancies at the temperatureprovided above - Write your answer with 4 significantfigures:  
        Your Answer =Incorrect.
8)Calculate the number of atoms per cubic meter in Metal B (unitsatoms/m³). Write your answer with 4 significant figures:
        Your Answer =Correct! ExactAnswer= 5.0961E+28 +/- 1.00E+26%
9) What is the composition, in atom percent, of an alloy thatcontains a) 36 g Metal A and b) 47 g Metal B? Composition for MetalA (%):  
        Your Answer =Correct! ExactAnswer= 31.02769217 +/- 1.00E-01%
10) What is the composition, in atom percent, of an alloy thatcontains a) 36 g Metal A and b) 47 g Metal B? Composition for MetalB (%):  
        Your Answer =Correct! ExactAnswer= 68.97230783 +/- 1.00E-01%
11) What is the composition of Metal A in atom percent, if thealloy consists of 4.5 wt% Metal A and 95.5 wt% of MetalB?  
        Your Answer =Incorrect.
12) What is the composition of Metal B in atom percent, if thealloy consists of 4.5 wt% Metal A and 95.5 wt% of MetalB?  
        Your Answer =