Question

1. Calculate the number of moles in each sample. a. 15.7 g CCl b. 1.8 x 1021 formula units of NaC 2. Calculate the number of grams in each sample 1.23 mol magnesium bromide 7.310 x 1025 molecules of H202 a. b. 3. Calculate the mass percent of H in each of the following compounds. C2H2 C2HsCI a. b. 4. Calculate the empirical formula of each of the following Methy butyrate: 58.80 % C, 9.87 % H, 31.33 % O Vanillin: 63.15 % C, 5.30 % H, 31.55 % O a. b. 5. Write a balanced, chemical reaction for the following (be sure to include phases): Nitric acid forms when gaseous nitrogen dioxide reacts with gaseous oxygen and liquid water. (simplified version) Solid iron reacts with gaseous oxygen to form solid iron (III) oxide Liquid dinitrogen tetrahydride decomposes to form gaseous nitrogen trihydride and gaseous nitrogern a. b. c. 6. Balance the following and classify the type of reaction a. b. Co(NOs)s (aq) + (NHa)25 (aq) Co2Sa (s)+NH&NO (aq) Cu2O (s) + C (s)-) cu (s) + CO(g) d. C5H12 (l) + O2 (g)-) ??, (g) + H:0 (1) e. H2SO4 (aq) ? SO2 (g) + O2 (g) + H2O (1) 7. Consider the following formula: N2Hs( NHs (g)+ N2 (g) a. Balance the chemical formula. b. Calculate how many moles of NHs form when 2.6 mol N2Hs completely reacts c. Calculate how many moles of N2 form when 65.3 g NaHs completely reacts. 8. For the following reaction, 2Mg (s)+ 02 (8)2Mgo (s), when 10.1 g of Mg reacts with 10.5 g of 02, 11.9 g of MgO is collected. Determine the limiting reactant, theoretical yield, and percent yield. Urea (CHaN20) is a common fertilizer that is synthesized by the reaction of ammonia (NHs) with carbon dioxide: NHs (aq)+CO2 (aq) 9. CHN20 (aq)+ H20 ) Balance the chemical reaction a. b. If I combine 136.4 kg of ammonia and 211.4 kg of carbon dioxide, what is the theoretical yield of urea? c. If the actual yield is 168.4 kg, what is the percent yield?

Answer 1

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DATE lol 요. X I nu is a 62 15 AIbD