M an unknown substance is cooled from 25 °c to 10 °c. the table below shows the state of the substance at different temperatures. time (minutes) temperature (degrees celsius) state of matter 0 25 liquid 2 23 liquid 4 18 6 18 8 18 10 15 solid 12 10 solid which statement is correct about the unknown substance? its freezing point is 23 °c. its freezing point is 18 °c. the substance sublimes at 23 °c. the substance exists as a gas at 18 °c.

The second statment is true and right. Hope this helps!!

Option (b) is the correct answer.

Explanation:

Freezing point is defined as the point at which liquid state of a substance changes into solid state.

So, in the given table it is shown that at temperature the substance is changing into solid state. Whereas at the substance is in liquid state.

Hence, will be the freezing point of the substance.

Thus, we can conclude that the statement its freezing point is , is correct about the unknown substance.

bcde is the incorrect answer it is a

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.