Both potassium chloride and calcium carbonate are white solids. Give two tests you would use to distinguish them.​

What are several ways to reduce the effect of friction

Just on number 2 (all parts), and if you do answer explain in detail

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.