when chlorine gas is bubbled into a solution of sodium bromide, the sodium bromide reacts to give bromine a red brown liquid and sodium chlorine. A solution was made by dissolving 20.0g of sodium bromide in 100.0 g of water. After passing through the solution, it contained 16.0 g of bromine and 11.7 g of sodium chloride. How many grams of chlorine reacted?

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To find out how many grams of chlorine reacted, we need to determine the change in mass of the sodium bromide solution. We can do this by subtracting the final mass of the solution from the initial mass.

Given:

Initial mass of sodium bromide solution = 20.0 g + 100.0 g = 120.0 g
Final mass of sodium bromide solution = 16.0 g bromine + 11.7 g sodium chloride = 27.7 g

Change in mass = 120.0 g - 27.7 g = 92.3 g

The change in mass represents the mass of chlorine that reacted with the sodium bromide. Therefore, 92.3 grams of chlorine reacted.