- What is the chemical or symbol for Co,Na, Tin, P, and F?

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Compute the sums below. (Assume that the terms in the first sum are consecutive terms of an a? Does potassium hydroxide and Iron (II) chloride form a precipitate ? Ask for the number of players in each team in a game the number of games completed points for each player total for each ? This says "express your answer with positive exponents" should I always do this when multiplying and dividing monomials? What mass of copper is produced from the reduction of 7.30 g Cu2S?
Cu2S(s) + O2(g) Cu(s) + SO2(g)?