10  mL of 2(M) NaOH solution is added to 200  mL of 0.5(M) of NaOH solution. What is the final co...

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10  mL of 2(M) NaOH solution is added to 200  mL of 0.5(M) of NaOH solution. What is the final concentration?
(a) 0.57(M)
(b) 5.7(M)
(c) 11.4(M)
(d) 1.14(M)

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