What is a spontaneous change?

A. One that has an ordered arrangement of particles.
B. One that occurs on its own.
C. One that has a random arrangement of particles.
D. One that occurs when one specific event happens.

According to the tide table below what time of day will the highest tide occur?

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.