A solution is prepared by adding 1.77 grams of sodium nitrate, 2.4 grams of potassium chloride, and 0.973 gram of ammonium nitrite to 255 grams of water. Calculate the total mass of the solution and express the sum in the proper number of significant figures.

Stage in which a star’s outer layers have started to cool and grow outward?

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

Which of the following are in a chemical family a. ca, sc, k b. cu, ag, au c. so, ge, sb