Gen Chem 1 Final Exam Review with Complete Solution – Saylor Academy Questions with 100% Verified Answers

Gen Chem 1 Final Exam Review with Complete Solution – Saylor Academy Questions with 100% Verified Answers Gen Chem 1 Final Exam Review with Complete Solution – Saylor Academy Questions with 100% Verified Answers 11.4 g of Na2SO4 dissolved in 400 mL of solution. What is the molarity of the solution? A) 0.2 M B) 0.5 M C) 0.4 M D) 0.1 M E) 0.3 M - Answer 0.2 M A 3.214g sample of magnesium reacts with 8.416g of bromine. The only product is magnesium bromide. If 1.934g of magnesium is left unreacted, how much magnesium bromide is formed? A) 1.280 g B) 7.136 g C) 9.696 g D) 3.268 g E) 5.202 g - Answer 9.696 g A compound has 4-% C, 6.7% H, and 53.3% O: its molar mass is equal to 120 amu. What is the formula of the compound? A) C4H8O4 B) C6H12O6 C) C2H4O2 D) CH2) E) C3H6O3 - Answer C4H8O4 A physical change A) occurs when sugar is heated into caramel B) occurs when iron rusts C) occurs when water is evaporated D) occurs when glucose is converted into energy within your cells E) occurs when propane is burned for heat - Answer occurs when water is evaporated A sample of copper absorbs 43.6 kJ of heat, resulting in a temperature rise of 50.0°C, determine the mass (in kg) of the copper sample if the specific heat capacity of copper is 0.385 J/g°C. A) 6.64 kg B) 11.9 kg C) 5.10 kg D) 2.26 kg E) 0.235 kg - Answer 2.26 kg A system absorbs 623 J of heat while doing 457 J of work. What is the value of internal energy change, ΔE? A) -166 J B) -1080 J C) +1080 J D) +166 J E) +623 J - Answer +166 J Aluminum reacts with a certain nonmetallic element to form a compound with the general formula Al2X3. Element X must be from group ______ of the periodic table of elements. A) 4A B) 5A C) 3A D) 6A E) 7A - Answer 6A An 56 Fe 2+ particle contains A) 28 protons, 28 neutrons, 26 electrons B) 54 protons, 56 neutrons, 52 electrons C) 58 protons, 58 neutrons, 56 electrons D) 26 protons, 26 neutrons, 26 electrons E) 26 protons, 30 neutrons, 24 electrons - Answer 26 protons, 30 neutrons, 24 electrons An x-ray has a wavelength of 1.2 A (1 A = 10-10 m). Calculate the energy, in J, of one photon of this x-ray radiation. A) 1.7x10^-15 J B) 1.2 J C) 1.7x10^-20 J D) 1.2x10^-20 J E) 1.7x10^-5 J - Answer 1.7x10^-15 J Balance the equation: C2H6 + O2 = CO2 + H2) What are the coefficients for O2 and CO2? A) 7O2, 4CO2 B) 7O2, 12CO2 C) 3O2, 2CO2 D) 6O2, 4CO2 - Answer 7O2, 4CO2 Based on the VSEPR theory, which should have the smallest XAX bond angle? **look at exam 4 because I aint paying to add images - Answer **look at exam 4 because I aint paying to add images