A major component of gasoline is octane (C, H, 8). When liquid octane is burned in air it reacts with oxygen (02) gas to produce carbon dioxide gas and water vapor. Calculate the moles of oxygen needed to produce 0.050 mol of water. Be sure your answer has a unit symbol, if necessary, and round it to the
correct number of significant digits.
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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.

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

Answer asap need by wednesday morning calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 best answer will be brainliest