Results in a new substance and it cannot be reversed
by physical means.

a. physical property

b. physical change

c. chemical change

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at -14.5 c? the freezing point for pure water is 0.0 c and k_f is equal to 1.86 c/m