Oxalic acid is a weak acid sometimes used to clean or bleach materials. It is especially effective in removing rust. Oxalic acid has a molar mass of 90.0 g/mol. It contains 20.2% hydrogen, 26.6% carbon and % oxygen. What is the empirical formula of this compound?
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In the reaction h2co3 (aq) + 3nh3 (aq) = 2 nh4+ (aq) + co3 2-, how many electrons are transferred?
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