<p> Chem 1510 SI Keith Week 4 Session 3</p><p>1. The current world record holder for the fastest time in the 200. meter dash is Usain Bolt, with a corrected time of 19.19 seconds. 1 mi = 1, 609 m 1 m = 3.281 ft</p><p> a. What is his average velocity in m/s? </p><p> b. How many feet can he travel in 5.00 seconds at this velocity? </p><p> c. What is his average velocity in miles per hour (mi/hr)?</p><p>2. Epinephrine has the formula C9H13O3N. How many carbon atoms are present in 1.00 g of epinephrine?</p><p>3. A 4.450 g sample of hydrated lithium iodide, LiI . xH2O, is dried in an oven. When the anhydrous LiI salt is removed from the oven, its mass is 3.170 g. What is the value of “x”?</p><p>4. A 12.000 g sample of a compound with generic formula CxHyOz undergoes combustion to</p><p> give 15.222 g of CO2 and 4.158 g of H2O. Calculate the empirical formula of the compound. 5. One of the steps in the commercial process for converting ammonia to nitric acid is the </p><p> conversion of NH3 to NO: </p><p>4NH3(g) + 5O2 (g) → 4NO(g) + 6H2O(g)</p><p>In a certain experiment, 2.25 g of NH3 reacts with 3.75 g of O2. </p><p> a. How many grams of NO form?</p><p> b. How many grams of excess reactant remain after the limiting reactant is completely consumed?</p><p>6. When 100.0 kg of sand (SiO2) is processed via the reaction below, only 51.4 kg of SiC are recovered. What is the percent yield of this process?</p><p>SiO2 (s) + 3C(s) → SiC(s) + 2CO(g)</p>