There are 15 different possibilities for an electron in the hydrogen atom to transition to a lower energy level. (Count them to prove it to yourself!) Study the hydrogen emission spectrum and complete the following statement. 400 500 600 700 The hydrogen emission spectrum shown indicates that a total of 4 transitions emit light in the visible region. Where do the other electronic transmissions occur? The transitions occur outside the visible region, like the UV or IR region, etc.

Order these chemical species by increasing pH of an 0.1 M aqueous solution of each. That is, imagine making an 0.1 M solution of each species. Select1 next to the species that makes the solution with the lowest pH. Select 2 next to the species that makes the solution with the next higher pH, and so on. Notice that some of the rankings have been filled in for you already. Also notice that water is on the list. For that particular case, just compare the pH of pure water to the pH of the other solutions. Note for advanced students: for all charged species, you may assume the necessary counterions act as neither acids nor bases. relative pH of 0.1 M aqueous solution species H20 4 H,PO4 HNO, (Choose one) NO2 7 OH (Choose one) HF (Choose one) ▼

Given the following data:     2 C6H6(l) + 15 O2(g) → 12 CO2(g) + 6 H2O(l)    ΔG0= -6399 kJ     C(s) + O2(g) → CO2(g) ΔG0= -394 kJ     H2(g) + ½O2(g) → H2O(l) ΔG0= -237 kJ       Calculate the ΔG0rxn for the reaction      6 C(s) + 3 H2(g) → C6H6(l)

(d) H₂ H₂C-C H₂ * HC -C H₂C CH3 Supporting Materials Periodic Table Additional Materials eBook Tutorial Constants and Factors Supplemental Data

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for each of the following compounds... a. Build a model using the molecular model kit b. Name the compound, using R, S nomenclature