How did the United States acquire the Panama Canal?

The United States wanted to build a canal in what is now the country of Panama. We had gained the exclusive right to build a canal with the Hay-Pauncefote Treaty in 1901. We were negotiating with Colombia for permission to build a canal through a region that originally belonged to Colombia. We offered them a $10 million fee plus an annual rent of $250,000. However, Colombia refused this offer.

The people who lived in this area weren’t happy being ruled by the government of Colombia. The United States, in a behind the scenes role, encouraged these people to revolt for their freedom. When the Colombians tried to enter the area to end the rebellion, our navy wouldn’t allow this to occur. When the people revolted, the United States quickly recognized the independence of the new country of Panama. We made the same offer to Panama that we made to Colombia. Panama accepted our offer, and we began to build the canal. The Panama Canal opened in 1914

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.