Calculate the mass (in grams) of the product formed when

For each of the reactions, calculate the mass (in grams) of the product formed when 15.82 g of the underlined reactant completely reacts. Assume that there is more than enough of the other reactant.

Express your answer using four significant figures.

1) 2K(s)+Cl2(g)−−−−−→2KCl(s)
2) 2K(s)+Br2(l)−−−−−→2KBr(s)
3) 4Cr(s)+3O2(g)−−−−−→2Cr2O3(s)
4) 2Sr(s)−−−−−+O2(g)→2SrO(s)

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