All those compounds are ionic.
Then they dissociate into ions when they are in water.
I will write the dissociation equations. The charges of the ions is indicated inside parenthesis.
KI -> K (+) + I (-) => two ions
K2SO4 -> 2 k(+) + SO4 (2-) -> three ions
NaCl -> Na(+) + Cl(-) => two ions
KBr -> K(+) + Br(-)
As you se every molecule of the compound K2SO4 dissociates into three ions, while the other compounds dissociate into two ions. Given that the decrase in the freezong point of water is proportional to the number of particles dissolved, the K2SO4 will lower the freezing point the most.
Answer: option B. K2SO4
Answer:
In the lab, students were encouraged to look at different types of rocks and minerals. They were also told to observe the physical properties of the rocks and minerals. Based on these physical properties, the children were able to distinguish the different types of rocks and minerals. The major differences which the children will focus on will be the color, shape, hardness, luster, streak, fracture and cleavage of the rocks and minerals.
Explanation:
A collision in which some part of a kinetic energy is changed into another form of energy is known as an inelastic collision.
In an inelastic collision momentum is conserved because total momentum of both the objects before and after the collision are same.
Whereas kinetic energy during this collision is not conserved because a part of kinetic energy changes into heat, sound and deformation of objects.
Thus, we can conclude that during an inelastic collision, the total momentum of the system is conserved, while kinetic energy is not conserved.
it might look like it has disappeared, but in fact it has just mixed with the water to make a transparent