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What NaCl concentration results when 299 mL of a 0.820 M NaCl solution is mixed with 407 mL of a 0.450 M NaCl solution?

:When heated, KClO3 decomposes into KCl and O2.

2KCLO_3 ---->2KCl +3O_2

If this reaction produced 91.5 g of KCl, how much O2 was produced (in grams)?

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