A liquid takes 10.14 x 10^6 J of energy to boil 28.47 kg at 298 K. Using the latent heats of vaporization of 5 liquids below, determine what the substance is. Acetone: 538,900 J kg-1 Ammonia: 1,371,000 J kg-1 Propane: 356,000 J kg-1 Methane: 480,600 J kg-1 Ethanol: 841,000 J kg-1 A. Ammonia B. Ethanol C. Acetone D. Propane

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.