Answer:
a) dispersion forces, dipole-dipole forces, hydrogen bonds
b) dispersion forces
c) ion-ion interparticle forces, hydrogen bonds, dipole-dipole forces
d) metallic bonds
Explanation:
The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles(Chem Purdue). Dipole forces exists in all molecules but not in metals.
The intermolecular forces present in each substance must be broken before the stated process can occur.
The nature of intermolecular forces in each substance has been shown in the answer section.
For ammonia, the dispersion forces, dipole-dipole forces and hydrogen bonds must be degraded before liquid ammonia begins to boil.
For solid phosphorus which is non polar, only dispersion forces needs to be broken.
To dissolve CsI in HF, ion-ion interparticle forces of CsI must be broken while the dipole-dipole forces, dispersion forces and hydrogen bonds between HF molecules must be broken.
Potassium metal is a pure metal hence only metallic bonds must be broken in order to melt the solid.
Answer : In the reaction of Ca +
--->Ca
, the coefficient of Ca and
will be the same which will be 1.
Explanation : As per the rules of writing a chemical equation and balancing it properly, the number of elements in reactants side should be equal to the number of elements generated in product side. Hence when we use 1 molecule of Ca and one molecule of
then it generates 1 molecule of Ca
.
Answer:
c.the speed of the bail decrease over time
Answer: no
Explanation: Water isn't wet by itself, but it makes other materials wet when it sticks to the surface of them.
