Acellus General Chemistry Questions & Answers

ACELLUS GENERAL CHEMISTRY QUESTIONS & ANSWERS (?) describes the forces that exist between like molecules in a liquid. - CORRECT ANSWERCohesion (?) describes the substance of minor percentage, the one being dissolved, in a homogeneous mixture. - CORRECT ANSWER- solute (?) describes the temperature at which a liquid's molecular motion becomes so slow that it solidifies. - CORRECT ANSWER- Freezing point [H+] for a solution is 2.65 x 10^-2M. The solution is (?) - CORRECT ANSWER- Acidic 0.075 grams of condensed vapor is present when a student uses the Dumas method. The experiment was conducted at 70 degrees C, 1 atm and the volume of the container is 0.045L. What is the molar mass of the material? - CORRECT ANSWER- 46.9 g/mol or 47 0.15 grams of Mg is combined with HCI to produce H2 gas. If the reaction occurs at 25 degrees C in a 150 ml container, what is the theoretical pressure change? - CORRECT ANSWER102kPa 2Al + 3Cl2 → 2AlCl3 How many grams of aluminum are required to produce 8.70 moles of aluminum chloride? - CORRECT ANSWER- 234.9 2FeBr3 + 3Na2S → Fe2S3 + 6NaBr (2 moles FeBr3/ 1 moles Fe2S3) - CORRECT ANSWER- Correct 93.2mL of a 2.03M potassium fluoride (KF) solution is diluted with 3.92L of water. What will be the volume, in liters, of the diluted solution? What will be the molarity of the diluted solution? - CORRECT ANSWER- 4.0132 L, 0.0471M KF A ? bond forms when two no metals share electrons. - CORRECT ANSWER- Covalent A (?) is a heterogeneous mixture which settles on standing and its components can be separated by filtration. - CORRECT ANSWER- Suspension A compound has an empirical formula CH2. What is its molecular formula, of its molar is 252.5 g/mol? - CORRECT ANSWER- C18H36 A compound has an empirical formula of C5H4. What is its molecular formula, if its molar mass is 128.17 g/mol? - CORRECT ANSWER- C10H8 A compound has an empirical formula of C6H6NO. What is its molar formula, if its molar mass in 216.2 g/mol? - CORRECT ANSWER- C12H12N2O2 A compound has an empirical formula of CH2. What is its molecular formula, if its molar mass is 70.13 g/mol? - CORRECT ANSWER- C5H10 A compound has an empirical formula of CH2. What is the molecular formula, if its molar mass is 70.13 g/mol? - CORRECT ANSWER- C5H10 A compound has an empirical formula of CHN. What is its molecular formula, if its molar mass is 135.13 g/mol? - CORRECT ANSWER- C5H5N5 A compound has an empirical formula of OH. What is its molecular formula, if its molar mass is 34.00 g/mol? - CORRECT ANSWER- H2O2 A compound has an empirical formula of OH. What is the molecular formula, if its molar mass is 34.00 g/mol? (O=16.00 amu, H=1.008 amu) - CORRECT ANSWER- H2O2 A double bond is made up of ? sigma bond(s) and ? pi bonds. - CORRECT ANSWER- 1 sigma, 1 pi