A₁ B3 E₁ = A B3 E Step 1: Find the Central Atom N Central atom is: Look your line bond structure on page 1. Molecular Shape of NI3 (11 N Central atom A (3) I (1) N Step 3: Choose the ABE classification Circle the correct AB, E, notation. Recall, we use (A) to represent the central atom, (B) to represent the number of atoms bonded to the central atom, and (E) to represent the number of lone pairs AB₁E3 AB₂E AB3E AB₁E2 AB₁E AB₂E2 AB2 AB3 AB4 Step 5: Use the Molecular Shape table from your notes to draw the ball and stick representation (N) I Batom surrounding central atom) lone pair Elone pair centralation) Step 2: Count number of atoms bonded to the central atom (B) # of atoms bonded to central atom = B = 3 Count number of lone pairs on the central atom (E) # of lone pairs on central atom = E= Step 4: Use the Molecular Shape Table from your notes to select the molecular shape and bond angles. 1 Molecular Shape-yramidal Bond angles = 110⁰ Step 6: Determine Polarity Is the central atom surrounded by identical electron groups? Circle one: yes If the answer was yes, then the molecule is nonpolar. If the answer is no, then the molecule is polar. Is the molecule polar? (no Circle one: yes no 21

Calculate the number of atoms in 264. µg of cadmium. Be sure your answer has the correct number of significant figures. Note: Reference the SI prefixes and Fundamental constants table for additional information. Cd atoms 0 x10 X

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Q5. As part of the aspirin synthesis lab, the orgo students also had to perform the following calculation to demonstrate their knowledge. Are you able to help them work this out?Saponification is a process in which soap is produced from the chemical reaction between animal fat (triglycerides) and a strong base such as NaOH. An example of such a balanced chemical reaction is shown here:C57H110O6 + 3NaOH à C3H5(OH)3 + 3C18H35O2NaIf, during the saponification reaction, 228.5 g of C57H110O6 is mixed with 211.7 g of NaOH and 180 g of soap is produced: a. Calculate the theoretical yield of soap (in grams), C18H35O2Na, and indicate which species is the limiting reactant. Provide your answer to 2 decimal places. b. Calculate the percent yield for this reaction. Provide your answer to 1 decimal place. Show ALL steps and equations involved in your calculations. Remember to label all steps clearly and use appropriate units