earning Goal: understand what resonance means and when it ccurs. Three resonance structures can be drawn for NO3 (see the figure) because it is possible to have the double bond on any of the three oxygen atoms. (Figure 1) Here the total number of valence electrons in NO3 is 24 (5 valence electrons from nitrogen, 18 electrons from 3 oxygen atoms, and 1 electron from igure 1 of 2 ▼ Which choice represents a pair of resonance structures? ►View Available Hint(s) ON=C-C1: and C=N_C1: ○ H-Ö-H and H-Ö: - 0:0_N=Ô: and:Ô=N-0: O :N=N:and: Ï-Ï: Submit Part B How many resonance structures can be drawn for ozone, O3? Express your answer numerically as an integer Pearson Contact

Ag+KNO3

PROVISIONAL LEWIS STRUCTURES T01/S01 For each provisional structure, identify if it is the correct Lewis structure (C) or if it needs to be modified according to procedure MA or MB to obtain the correct Lewis structure. MA. Form multiple bonds to the central atom using lone pair on the terminal atom(s) until the central atom has an octet (or septet). MB. Form multiple bonds to the central atom using lone pair on the terminal atom(s) until the central atom has a formal charge of zero (0) or until two double bonds are formed. A provisional structure has the valence electrons distributed in order as (1) a bond between each pair of atoms, (2) an octet for each ligand (terminal) atom or ligand group (CH3, NH2 or OH) and (3) any remaining electrons on the central atom.

Complete the following equations, using appropriate notations and formulas: a 150 → ? +15 N Kr + 16 ? b ? = ? =

14

t-BUOK CI t-BUOH

How much 50X TAE would you need to prepare 1L of 1X TAE?

1-19. Any dilute aqueous solution has a density near 1.00 g/mL. Suppose the solution contains 1 ppm of solute; express the concentration of solute in g/L, µg/L, ug/mL, and mg/L.

None

7. A procedure for measuring the amount of creatinine in blood was applied to a standard blood sample and the following results were produced: 0.787, 0.812, 0.796, 0.739, 0.802, and 0.823 mg/dL.  a) Can any of the data points be rejected by the Grubbs test? b) What is the 95% confidence interval for the data?