In the laboratory a student combines 36.8 mL of a 0.441 M sodium chloride solution with 27.5 mL of a 0.385 M sodium nitrate solution. What is the final concentration of sodium cation ?
M

Which of the following observations indicates that an atom has neutrons? some uncharged particles are scattered by a beryllium atom when it hits a gold foil. some uncharged particles bounce back from a gold foil when it is bombarded with alpha particles. a radiation consisting of uncharged particles is emitted when alpha particles strike beryllium atoms. a radiation which attracts electrons is produced when a beryllium atom is bombarded with alpha particles.