Which of the following best describes the changes during the process shown below? Select all that apply. Some London dispersion forces were overcome. Some London dispersion forces were formed. Some covalent bonds were formed. Some covalent bonds were overcome. The potential energy curves for two oxygen atoms approaching (solid line) and two helium atoms approaching (dashed line) is shown below. Which of following conclusions can you specifically make from these curves? Choose four. The oxygen atoms form covalent bonds The oxygen atoms form LDFs The neon atoms form covalent bonds LDFs are weaker than covalent bonds There is a larger distance between the nuclei in covalent bonds than in LDFs Covalent bonds are weaker than LDFs The neon atoms form LDFs There is a larger distance between the nuclei in LDFs than in covalent bonds Balance the following equation using small, whole number coefficients. What is the coefficient in front of A ? A+BY2AB3+AY 4 7 6 1 2 5 3 The imaginary molecule AB3 has a molar mass of 52.1g/mol and is produced according to the following balanced equation: A2+3B22AB3 When 2.3 mol A2 reacts with excess B2,96gAB are produced. What is the percent yield for this reaction? 100% 40% 80% 63% 54% 92%