An atom has a mass number of 25 and 13 neutrons. what is the atomic number of this atom? express your answer as an integer.

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

In water, a strong acid will break down into its component parts. a. completely b. partly c. never in water, a weak base will break down into its component parts. a. completely b. partly c. never