Tooth enamel ( ca5(po4)3(oh) ) reacts with acid according to the reaction below: ca_5(po_4)_3(oh) (s) + h^+(aq) \leftrightarrow 5ca^{2+}(aq) + 3hpo_4^{2-}(aq) + oh^-(aq) c a 5 ( p o 4 ) 3 ( o h ) ( s ) + h + ( a q ) ↔ 5 c a 2 + ( a q ) + 3 h p o 4 2 − ( a q ) + o h − ( a q ) what happens if we add more acid?

A__ is two or more substances that are together in the same place but are not chemically combined

0.66y = 0.9x + 0.48 if y has a value of 108.45 what is the value of x?

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.