Both the physical and chemical properites of a substance can change when a substance undergoes a chemical reaction. when a log is burned, a chemical reaction occurs. the log is transformed into ash, water vapor, and carbon dioxide. the log is flammable, or able to be burned, in its original form. once the log is burned, however, the ashes that are produced are no longer flammable. the volume of the log also changes when it changes into ash and gas. volume is a property. flammability is a property. a. chemical; physical b. physical; physical c. physical; chemical urgent time limit 84pts

When 225mg of anthracene, c14h10(s), was burned in a bomb calorimeter the temperature rose by 1.75k. calculate the calorimeter constant. by how much will the temperature rise when 125mg of phenol, c6h5oh(s), is burned in the calorimeter under the same conditions? (δch< (c14h10,s)=–7061 kj mol−1.)

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 is the oxidation state of each individual carbon atom in c2o42−?