When heat is supplied to a solid, the molecules vibrate but do not leave their positions. why is this behavior observed? . a. molecules do not have enough kinetic energy to overcome the intermolecular bonds.. b. molecules have enough kinetic energy to overcome the intermolecular bonds.. c. molecules do not have enough kinetic energy to overcome the pressure between the molecules.. d. molecules do not have enough potential energy to overcome the pressure between the molecules.

Answer is option a that is molecules donot have enough kinetic energy.

Mass  of CaCo3  is  calculated  as  follows

calculate   the  moles   of  CaCO3  by  use  of  Avogadro  constant
that is  1  moles  =  6.02  x10^23  molecules

what  about   5.11  x10^25  molecules

by  cross  multiplication

= 1 mole  x (  5.11  x10^25)  /(  6.02  x10^23)  =  84.88  moles

mass  =  mole  x  molar  mass
the  molar  mass  of CaCO3  =   40.078  +  12.011+  (3  x15.999)  =  100.086  g/mol

mass  is therefore  =  84.88  moles  x  100.086  g/mol=  8495.3   grams