Answer
The hydrogen ion concentration of the car battery acid is $0.1M$.
Work Step by Step
$pH = -\log [H^{+}]$
$1 = -\log [H^{+}]$
$[H^{+}] = 10^{-1}$
$= 0.1 M$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.