Chemistry Cumulative Exam 2023 with 100% correct answers

In which orbitals would the valence electrons for carbon (C) be placed? - correct answer s orbital and p orbitals What is the nuclear binding energy of an atom that has a mass defect of 1.643 10-28 kg?Use E = mc2. (Remember: The speed of light is approximately 3.00 108 m/s.) - correct answer 1.48 10-11 J A teacher wants to perform a classroom demonstration that illustrates both chemical and physical changes. Which would be the best demonstration that she could use? - correct answer burning a candle How does heat differ from temperature? - correct answer Temperature measures thermal energy, and heat is the flow of thermal energy. The enthalpy of formation of water is -285.8 kJ/mol. What can be inferred from this statement? - correct answer Heat is released during the process. Consider the reaction below. 2C6H14 + 19O2 12CO2 + 14H2O How many moles of hexane (C6H14) must burn to form 18.4 mol of carbon dioxide? - correct answer 3.07 mol Consider the following system at equilibrium. CaCO3(s) Ca2+(aq) + CO32-(aq) The addition of which compound will cause a shift in equilibrium because of a common ion effect? - correct answer Na2CO3 Which postulate of the kinetic-molecular theory best describes the event in the diagram? - correct answer All collisions between particles are perfectly elastic. Consider the positions of barium (Ba), sulfur (S), silicon (Si), and calcium (Ca) on the periodic table. The atoms of which element require the least amount of energy to give up an electron when forming chemical bon