Select all of the following that are chemical changes Group of answer choices photosynthesis breaking a window into very tiny pieces melting a can turning a tin can into aluminum foil iron rusting and breaking apart crushing a can

Which statement justifies that phosphine (ph3) is a polar molecule?

9. write the chemical equation for the following word equations. include symbols for physical states in the equation. a. solid zinc sulfide + oxygen gas -> solid zinc oxide + sulfur dioxide gas b. aqueous hydrochloric acid + aqueous barium hydroxide -> aqueous barium chloride + water

Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radiating from the nucleus of some atoms beta particle 3. negative particle identical to an electron but radiating from a decaying nucleus alpha particle