Answer:
number of atoms = 1.993 x 10^25 atoms
Step-by-step explanation:
please check the attached photo of the complete question
To get the number of atoms we need to get first the mass of titanium by using this formula :
mass = density * volume
the volume of the cube = length^3
1 inch = 2.54 centimeters
2.78 inch = ??
length in cm = 2.54 * 2.78 = 7.0612 cm
so the volume = length^3 = 7^3 = 352.07528346 cm^3
bs substitution in mass formula:
when density = 4.5 g/cm and volume =352.07528346 Cm^
mass = 4.5 * 352.07528346 = 1584.33877557 g
the number of atoms = mass / molar mass * avogadro's number(constant)
= (1584.33877557/47.867 )* 6.02 * 10^23
= 33.0988 * (6.02*10^23) atoms
=1.993 x 10^25 atoms