What is the concentration of nitrate ions in a solution obtained by mixing 300. Ml of 0. 210 m potassium nitrate(aq) with 300. Ml of 0. 150 m zinc nitrate(aq).

The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures