Which statement is always true about objects which exert gravitational force on each other? (3 points) They have mass. They have speed. They are a very large size. They exist only in outer space.

Different isotopes indicate that an element will have different numbers of

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!

What forms when chemical reactions combine pollution with sunlight?