What is the [H^+] in a 0.10 N solution o...

What is the `[H^+]` in a 0.10 N solution of ascorbic acid, `C_6H_8O_6`?

`8.0xx10^(-6) M`

`2.8xx10^(-3) M`

`4.0xx10^(-3) M`

`5.3xx10^(-3) M`

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