An aqueous solution of 1.20 M potassium bromide, KBr, has a density of 1.10 g/mL. The percent by mass of KBr in the solution is

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Based on its chemical properties, identify the position of each chemical family on the periodic table.

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6