`40 ml` of `0.5 M K Br` and `60 ml 1 M K Br` are mixed. The solution is then heated to evaporate water until the total volume is `20 ml`. What is the final molarity of `K Br`:A. `1 M`B. `3 M`C. 4 MD. 2 M

`40 ml` of `0.5 M K Br` and `60 ml 1 M K Br` are mixed. The solution i

1.	`40 ml` of `0.5 M K Br` and `60 ml 1 M K Br` are mixed. The solution is then heated to evaporate water until the total volume is `20 ml`. What is the final molarity of `K Br`:A. `1 M`B. `3 M`C. 4 MD. 2 M
Answer» Correct Answer - C `[K Br]_("final") = (n_(K Br))/(V_("final")) = (M_(1)V_(1) + M_(2)V_(2))/(V_("final")) = (0.5 xx 40 + 1 xx 60)/(20)` `= (80)/(20) = 4M`

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`40 ml` of `0.5 M K Br` and `60 ml 1 M K Br` are mixed. The solution is then heated to evaporate water until the total volume is `20 ml`. What is the final molarity of `K Br`:A. `1 M`B. `3 M`C. 4 MD. 2 M

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