SO 2 + 2H 2 S â 3S . solution. .wsite-menu-default a {} CaF2(s) + H2SO4(aq) â CaSO4(aq) + 2HF(g) In CaF2, the oxidation number of Ca is , and that of F is . acidic. com_currentSite = "669405196395665863"; .galleryCaptionInnerText {} The average oxidation number of oxygen atoms on both sides of the equation. "The oxidation number of H is +1, but it is -1 in when" "combined with less electronegative elements." The important rules for this problem are: The oxidation number of "H" is +1, but it is -1 in when combined with less electronegative elements. _W.configDomain = "www.weebly.com";_W.relinquish && _W.relinquish() })(); 6. #wsite-title {} _W.storeCurrency = "AUD"; } else if(document.documentElement.initCustomerAccountsModels === 0){ "182336852511387711", Of the reactions below, only _____ is â¦ _W.themePlugins = []; _W.recaptchaUrl = "https://www.google.com/recaptcha/api.js";