Amover packs books, cds, and dvds into a moving box. if the box contains 6.5 kg of books, 1.5 kg of cds, and 2.0 kg of dvds, what is the percent by mass of each object in the box?

Select the correct answer. when carbon dioxide dissolves in water, it sometimes reacts with water to form carbonic acid as in this balanced equation: co2 + h2o → h2co3. if 495 milliliters of carbon dioxide at 25°c and 101.3 kilopascals reacts with excess water, what is the theoretical yield of carbonic acid? use the periodic table and the ideal gas resource a. 0.889 g b. 1.10g c. 1.27g d. 2.02g what's the answer! quick!

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains