CHM113 Final Exam Questions With 100% Correct Answers

CHM113 Final Exam Questions With 100% Correct Answers Which of the following is NOT a compound? - answerO2, oxygen is a molecule What is the chemical symbol for the element, copper? - answerCu Which property is a chemical property - answerflammability Which of the following mixtures is heterogeneous? - answergranite Which of the following processes is/are physical changes? Select all that apply - answerwater evaporating, tearing a piece of aluminum in half Which unit is NOT an SI base unit? - answercelcius Which metric prefix means 10^-9 - answernano Which of the following measurements has three significant figures? - answer.00871 m3 An Olympic-sized swimming pool can hold approximately 6.60 x 105 gallons of water. Calculate the volume of the water in cubic meters (m3). Express your answer with the correct number of significant figures. Hint: 1 gal = 3.785 L - answer2.50 x 10^3 Aluminum has a density of 2.70 g/cm3. If a piece of aluminum foil weighs 0.853 g, what is the volume of the piece of foil (in cm3)? Express your answer with the correct number of significant figures. - answer.316 Which scientist is credited with the discovery of the proton? - answerErnest Rutherford How many protons, neutrons and electrons are in the isotope, 238U? - answer92 protons, 146 neutrons, 92 electrons Which property is NOT a property of a non-metal? - answerLose electrons easily Group 6A on the periodic table is also known as _______________. - answerChalcogens Which of the following statements is false regarding cations? - answerpolyatomic ions cannot be cations What is the correct formula for a compound composed of zinc and chlorine? - answerZnCl2 What is the oxidation number for the iron atom in the compound, Fe3(PO4)2? - answer+2 What is the correct name for the chemical formula, Mg(OH)2? - answermagnesium hydroxide Which of the following chemical formulas is correctly paired with its name? - answerP4O10, tetraphosphorus decoxide Which of the following is NOT a strong acid? - answerHF Which of the following would a chemical equation NOT include? - answerThe masses of both the reactants and the products When the following equation is correctly balanced, the coefficient in front of NaN3 is __________. - answer2 What is the molecular weight (in amu) of glucose (C6H12O6)? - answer180.2 What is the mass of Ba (g) in 3.50 g BaCO3? - answer2.44 How many H atoms are in 2 moles of H2SO4? - answer2.409 * 10^24 What is the mass (in g) of 0.5722 mole of chlorine gas? - answer40.57 What is the empirical formula of a compound that contains 27.0% S, 13.4% O and 59.6% Cl by mass? - answerSOCl2 Which of the following statements is incorrect about the equation below? - answerWhen 4 molecules of nitrogen gas are produced, at least 6 molecules of oxygen gas and 10 molecules of ammonia must have reacted. Under appropriate conditions, nitrogen gas and hydrogen gas undergo a combination reaction to yield ammonia: N2 (g) + 3 H2 (g) → 2 NH3 (g) How much ammonia (in g) is produced if 3.00 g of N2 and 2.85 g of H2 are allowed to react? - answer3.65 If the theoretical yield of a reaction was 58.8 g but the actual yield was only 12.2 g, then what is the percent yield of the reaction? - answer20.7% Of the species below, __________ is a strong electrolyte. - answerHCl (aq)