We know a chemical reaction has occurred when -
a) a solid dissolves.
b) a new substance is formed
c) to substances are mixed together.
d we no longer see one of the reactants.

Each pair of clay balls represents to planetesimals if each plane test molluscum pound of the same material and is separated by the same distance which pair experiences the greatest gravitational attraction

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

Calculate the concentration of all species in a 0.165 m solution of h2co3.