H3_FA2010 - Hydrosulfuric acid: Phosphoric acid Nitric acid...

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Chem 111 FA 2010 Graded Homework 3           Name ________________________ PRINT LEGIBLY DUE: MON. Sept. 20 by 5 pm . Show all work. REPORT UNITS AND CORRECT SIG FIGS. No credit will be given for answers with no work shown, or if the work does not lead to the answer shown. . 1. (1 pt) How many atoms of Ca are there in 4.83 x 10 - 12 moles of Ca 3 (PO 4 ) 2 ? 4. (1.2 pt) Identify the product and balance the following reactions. Each of these reactions produces one product, a binary compound. Use fully factored, integer coefficients. Write the oefficients in the spaces provided: a) ___ Ba (s) + ___ O 2 (g) _____________ b) ___ S 8 (s) + ____ O 2 (g) __________ (sulfur is in its +3 oxidation state in the product) c) _____ Al (s) + _____ S 8 (s) __________ 5. (0.8 pts) Name these ionic compounds: (a) FeBr 3 (e) CoSO 4 (b) SnO 2 (f) Ca(NO 3 ) 2 (c) Ba(OH) 2 (g) Ag 3 PO 4 (d) NaClO 4 (h) Pb(C 2 H 3 O 2 ) 2
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6. (1.2 pts) Name these binary covalent (molecular) compounds. (a) N 2 O 5 (b) Se 2 O 3 (c) XeO 3 (d) ClO (e) N 4 Se 4 (f) P 4 O 10 7. (0.8 pts) Write the chemical formulas for these acids:
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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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This note was uploaded on 01/05/2012 for the course CHEM 111 taught by Professor Lemaster during the Fall '08 term at Boise State.

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H3_FA2010 - Hydrosulfuric acid: Phosphoric acid Nitric acid...

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