** will give you brainliest plus 15 points for this one question ** a substance has a melting point of 80 °c. which of the following is true for the substance? a. when the substance is heated, its temperature will rise above 80 °c after 50% of the liquid has changed to vapors. b. when the substance is heated, its temperature will rise above 80 °c after 100% of the liquid has changed to vapors. c. when the substance is cooled, its temperature will fall below 80 °c after 50% of the liquid has changed to solid. d. when the substance is cooled, its temperature will fall below 80 °c after 100% of the liquid has changed to solid.

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.

What state of matter is ice a. liquid b. element c. solid d. gas

How many liters of 3.0 m naoh solution will react with 0.60 liters of 4.0 m h2so4? h2so4 + naoh → na2so4 + h2o 1.2 l 1.6 l 2.4 l 2.8 l