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Change these word equations into formula equations and balance them. Be sure to use the proper symbols to indicate the state of each substance as given.
(a) Magnesium metal is placed into hydrobromic acid solution, forming hydrogen gas and aqueous magnesium bromide.
(b) When heated, solid calcium chlorate decomposes into calcium chloride solid, releasing oxygen gas.
(c) Solutions of barium bromide and sodium phosphate combine to form solid barium phosphate and aqueous sodium bromide.
(d) Solutions of silver nitrate and aluminum iodide are mixed together, forming solid silver iodide and aqueous aluminum nitrate.