Answer: option C, ion-dipole
Explanation:
Since the order of intermolecular forces is as follows
Ion-dipole > Hydrogen bonding> Dipole-dipole> dipole -induced dipole> ion induced dipole> dispersion forces
When you are doing a experiment, you are testing if your hypothesis is correct or false. If your hypothesis is false, you have to disgard it. If it is correct, you have to do many more parallels, and if they also confirm your hypothesis, your hypothesis can become a theory.
The half life of a substance is the time taken by a radioactive substance to decay by half its original mass. In this case, the half life of Potassium-40 is 1.3 billion years.
Original mass of Potassium-40 = 12 g (100%)
New mass after the decay = 3 g ( 25 %, since 75% was replaced by argon)
New mass = Original mass × (1/2)^n ; where n is the number of half lives.
3 = 12 × (1/2)^n
(1/2)^n = 1/4
n = 2
Therefore; the time taken will be 1.3 × 2 = 2.6 Billion years
A MOLECULE
A molecule is a true representative of a covalent bond.
Answer:
The value of n in the hydrate formula is 5 ,
.
Explanation:
Mass of hydrate of copper sulfate = 14.220 g
Moles of hydrate of copper sulfate =
Mass of copper sulfate after heating = 8.9935 g
Moles of copper sulfate = 
Solving for n, we get:
n = 5
The value of n in the hydrate formula is 5 ,.
