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Unformatted text preview: Hydrosulfuric acid: Phosphoric acid Nitric acid Hypochlorous acid 8. (0.6 pts) Write the balanced chemical equation showing the reaction of hydrobromic acid with potassium bicarbonate. 9. (0.4 pts) The empirical formula of a compound is C 3 H 2 N. The molar mass is 312.29. What is the compound formula? 10. (1 pt) Calculate mass (grams) of sodium in a sample of Na 3 AsO 4 . The total sample mass is 21.93 g. Mass sodium = 11. (1 pt) How many grams of KMnO 4 must be added to 250.0 mL water to make a solution having a concentration of 0.1500 moles of the salt per liter of water (0.1500 M ) ? (dimensional analysis problem.) Mass KMnO 4 = 12. (2 pts) A solid substance is analyzed for percent composition (mass/mass) with the results shown. Calculate the empirical chemical formula of the compound. Carbon = 74.03 % hydrogen = 8.70 % nitrogen = 17.27 %...
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- Fall '08
- Chemistry, Acids, pts, correct sig figs