Chemical reactions occur when chemical bonds between atoms are formed or broken. reactants come together and produce a reaction at the end known as the products. a reactant combined with another is written as a chemical formula. usually in a chemical formula an arrow is drawn between the reactants and products to indicate the direction of the chemical reaction. some chemical reactions run in one direction until the reactants are used up. these are known to be irreversible reactions. other reactions, however, are classified as reversible. reversible reactions can go in both the forward and backward.

Based on the equation and the information in the table, what is the enthalpy of the reaction?

The excretory system,need answers for all: )

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