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3) A cube made of Plantnum (Pt) has and edge length of 2.70cm. The density of Pt is 21.45g/cm^3.

a) Calculate the number of Pt atoms in the cube
b)Atoms are spherical in shape. Therefore, the Pt atoms in the cube cannot fill all the avaliable space. If only 74.0 percent of the space inside the cube is taken up by Pt atoms, calculate the radius in picometers of Pt atom. The mass of a
single PT atom is 3.240 times 10^-22g. (the volume of a sphere of radius r is (4/3)pie r^2. THe volume of cube is l^3, where l is the length of a side. Avagadros's number is 6.023 times 10^23)

Answers (1)

  • Chemtutor
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