# Chem (edited)

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The electrolyte from a car battery has H2S04 (aq) concentration of 4.5 per mol per litre and a density of 1.18g per ml

What is the percentage by mass of H2S04 in the electrolyte?

do you mean 4.5 mol per liter? This has absolutely no meaning:

concentration of 4.5 per mol per litre

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