The amount of nitrogen in an organic substance can be determined by an analytical method called the kjeldahl method, in which all the nitrogen in the organic substance is converted to ammonia. the ammonia, which is a weak base, can be neutralized with hydrochloric acid, as described by the equation

Alice did an experiment to find the relationship between the angle at which a ray of light strikes a mirror and the angle at which the mirror reflects the light. she placed a ray box in front of a mirror. she changed the angle at which the light from the ray box struck the mirror and noted the corresponding angle at which the mirror reflected the light. which of the following is the dependent variable in this experiment? the mirror used to reflect the light the ray box used as the source of light angle at which the light from the ray box strikes the mirror angle at which the mirror reflects the light from the ray box