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Q) A 117.8g sample of pure cobalt was reacted in the presence of excess oxygen. After fully reacting, the weight of the product was 149.9g. using this information: A) determine the empirical formula of cobalt oxide. B) Determine the valence/charge of the cobalt in the compound Q)Consider the following reaction 3Na2CO3(s)+2H3PO4(aq)--->2Na3PO4(aq)+3H2O(I)+3CO2(g) If 20g of sodium carbonate reacts with excess phosphoric acid, what volume of carbon dioxide gas is produced if the reaction occurs at 15oC and 105kPa?
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