YMCA Prices. The YMCA (Young Menâs Christian Association) is an organization which aims to put Christian values and principles in place by helping members develop a sound mind, body and spirit. The organization, which began in 1944, now has 125 national associations with members and beneficiaries numbering in the millions.
A chemical reaction is a process in which the identity of at least one substance changes. A chemical equation represents the total chemical change that occurs in a chemical reaction using symbols and chemical formulas for the substances involved.
A rearrangement of the atoms or molecules of two or more substances that come into contact with each other, resulting in the formation of one or more new substances. Chemical reactions are caused by electrons of one substance interacting with those of another. The reaction of an acid with a base, for example, results in the creation of a salt and water. Some, but not all, reactions can be reversed.