CHM 1100C QUIZ 3 with 20 Updated Questions and Answers Graded A+;Rasmussen College

CHM 1100C QUIZ 3 with 20 Updated Questions and Answers Graded A+;Rasmussen College CHM 1100C QUIZ 3 with 20 Updated Questions and Answers Graded A+;Rasmussen College 1. What is the molecular formula for strontium hydroxide? a. Sr (OH )2 b. Ba( OH )2 c. S e (OH )2 d. S t (OH )2 2. Xylose is a carbohydrate that contains carbon, hydrogen, and oxygen. The empirical formula of Xylose is CH2O, and its molar mass is 150.1g/mol. Find the molecular formula of Xylose. a. C5 H 10 O5 b. C6 H 1 2 O6 c. C4 H 8 O4 d. C2 H 4 O2 3. Determine the correct molecular geometry and bond angle for S O2 a. Trigonal planer, 120 degrees b. Tetrahedral, 109.5 degrees c. Linear, 180 degrees d. Bent, 120 degrees 4. Determine the lewis structure for BF 3 5. Determine the lewis dot structure for CH 2 O 6. BHCl2 is a nonpolar molecule. a. True b. False 7. What is the name for HI? a. Iodic acid b. Hydroiodic acid c. Hydrofluoric acid 8. What is the molecular formula for sulfuric acid? 2−¿ a. SO¿ b. H 2 SO4 2−¿ c. SO¿ d. H 2 SO3 9. What is the name of H 3 PO4 ? a. Hydrophosphorous acid b. Phosphoric acid c. Hydrophosphoric acid d. Phosphorous acid 10. Find the mass is grams of Al contained in 3.04g of Al2 O3 and report with the correct significant figures. a. 5.74g Al b. 23.0g Al c. 1.61g Al 11. Determine the correct lewis dot structure for PF5 12. BF3 is a polar molecule. a. True b. False 13. Calculate the mass percent of 0.389g of silicon that reacts with oxygen to form 0.832g of silicon dioxide(SiO2) a. 51.2% b. 38.6% c. 46.6% d. 20.9% 14. A 5.41g sample of carbon reacts with hydrogen to form 6.32g of an organic compound. What is the empirical formula of the organic compound? a. CH3 b. C2H5 c. C3H7 d. CH2 15. Find the number of moles that are in 2.93g of LiO2 and report it with the correct number of significant figures. a. 8.75 x 10^22 mol b. 9.81 x 10^-2 mol c. 0.0980589 mol d. 87.5 mol 16. Calculate the mass of Chromium (Cr) in magnesium dichromate (MgCr2 O7) a. 21.6% b. 23.1% c. 43.3% d. 44.0% 17. Determine the resonance structures for 3−¿ PO¿ 18. Find the molecular weight of Al2 O3 a. 85.96 g/mol b. 42.98 g/mol c. 101.96 g/mol d. 69.96 g/mol 19. A gold wedding band contains 2.3 x 10^22 Au atoms. How many moles of gold are in the wedding band? a. 3.8 x 10^-2 mol Au b. 26.2 mol Au c. 3.8 mol Au d. 3.92 mol Au 20. Determine the correct molecular geometry and bond angle for BF3. a. Trigonal planer, 120 degrees b. Tetrahedral, 109.5 degrees c. Bent, 120 degrees d. Linear, 180 degrees