The following diagram shows an incomplete Lewis Diagram for an important amino acid used by the body in making proteins. Complete the Lewis Diagram, assuming all atoms have a formal charge of zero. Then answer the following questions about the completed Lewis Diagram. The diagram shows two carbon atoms, two oxygen atoms, five hydrogen atoms, and one nitrogen atom. The two carbon atoms are connected to each other by a single bond; the left carbon atom is marked with the number “1” and the right carbon atom is marked with a number “2”. Carbon 1 is positioned lower relative to carbon 2. Carbon 1 is single bonded up and to the left to an oxygen atom which is single bonded down to the left to a hydrogen atom. There is an unbonded oxygen atom directly below Carbon 1. Carbon 2 has single bonds upward to the right and left to two hydrogens. An unbonded nitrogen atom single bonded to two hydrogen atoms is located below and to the right of Carbon 2, at the same level as Carbon 1.               Identify the orbital hybridization of carbon #1. Identify the molecular and electron geometries around carbon #2. How many pi bonds and how many sigma bonds are in this molecule? How many lone pairs are in this molecule? Answers must be written in the space provided.   Note: If you are unable to show your work adequately using the Rich Text Editor, complete your work on scratch paper. Upload a photo of your work in the “Comments” of this exam immediately after you have completed and submitted the exam. You can access the “Comments” through the grade book. Answers provided on scratch paper alone will not be scored.

The table shows three gases in identical rigid containers under the conditions listed.     Container A Container B Container C Gas Methane Ethane Butane Formula CH4 C2H6 C4H10 Molar Mass (g/mol) 16 30 58 Temperature (°C) 27 27 27 Pressure (atm) 2.0 4.0 2.0   The density of the gas, in g/L, is

Select the choice that best fits this statement: In which of the following species does sulfur have the same oxidation number as it does in H2SO4?

Based on their Lewis diagrams, which of the following pairs of liquids are most soluble in each other?

A student places a sample of a pure metal in a crucible and heats it strongly in air. Data from the experiment are given in the table below. The final mass was determined after the sample was cooled to room temperature. Mass of empty crucible12.0 gMass of crucible and sample before heating14.4 gMass of crucible and sample after heating16.0 g Which of the following statements related to the experiment is correct?

Prepare a data table that shows the results for the analysis of the brass sample using the visual comparison method. 

Which of the following best describes the solid represented in the diagram? The figure presents a diagram of a solid consisting of 8 large shaded circles and 8 smaller unshaded circles. A negative sign is drawn in each of the shaded circles, and a positive sign is drawn in each of the unshaded circles. The circles are arranged in 4 rows. The first row contains 4 shaded circles that are close to each other but do not touch. The second row contains 4 unshaded circles, which touch the shaded circles and are shifted to the right of the first row of circles so that they are below the spaces between the circles in the first row. The third row contains 4 shaded circles, each one directly below (but not touching) one of the shaded circles in the first row. They touch the unshaded circles in the second row. The fourth row contains 4 unshaded circles, each one directly below (but not touching) one of the unshaded circles in the second row. They touch the shaded circles in the third row.

Of the three solutions listed in the table, which one, if any, has the greatest electrical conductivity and why? Solution0.1 M HC2H3O2(aq)0.1 M KI(aq)0.1 M CH3OH(aq)

Two flexible containers for gases are at the same temperature and pressure. One holds 0.50 grams of hydrogen and the other holds 8.0 grams of oxygen. Which of the following statements regarding these gas samples is FALSE?

Prepare a data table to record all of your data from the spectrophotometer, showing the relationship between absorbance and concentration. Make sure to include data for the brass as well.