If the density of air is 1.2 g/cm3, why does a balloon filled with helium float?

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? a. 3.88 m, b. 1.03 m, c. 1.5 m, d. 15.5 m

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize

Select all the correct answers. which compounds have the empirical formula ch20? (multiple answers)a. c2h4o2b. c3h603c. ch2o2d. c5h1005e. c6h1206