2. Acetylene gas, C2H2 , undergoes combustion to produce carbon dioxide and water
vapor. If 75.0 L of CO2
is collected over water at 20.0oC at an atmospheric
pressure of 997 mbar, how many grams of acetylene gas were combusted? (The
vapor pressure of water at 20.0oC is 2.3 kPa.

Who is better, messi or cristiano, i need this for a chemistry class. asap

Matches the chemical name of each oxide of phosphorus to its chemical formula

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.