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Calculate the mass in grams of 0.568 moles BaSO4.  (molar mass = 233.4 g/mol)

Based on the octet rule, phosphorus most likely forms a __________ ion.

Message from Chemical Kim, First: When I review the test video and I don’t see you have set up the webcam so that I can see you, your work area, and your computer screen, you will get a zero grade. You CAN NOT use the nonremovable forward-facing webcam that came with your computer. You do need to have a webcam that detaches. Second: If you have a pen or pencil out, you will get a zero grade. You MUST use a whiteboard that is wiped clean at the end of the test. You will get a zero grade if I see a pen or pencil being used.   Before you begin: YOUR CAMERA NEEDS TO BE A REMOVABLE WEBCAM IN THE CORRECT POSITION NO SCRAP PAPER ALLOWED! MUST USE WHITE BOARD! Show the camera the front and back of any printed handouts (only allowed to use the ones indicated). Show the camera the clean whiteboard  Show the camera your calculator. If you’re using the calculator on your mobile (phone), it must be the “Desmos Test Mode” App. Select “Scientific Calculator” and Hit “Start Test” Show the calculator screen to the camera. Which of the following statements best describes an ionic bond?

Which of the following is the best Lewis diagram for NO2–?

Determine the electron pair geometry / molecular geometry for the following compound: XeF4

What is termed the mass of 1 particle of MgCl2

For the Lewis Dot Structure of an Ionic Compound like CaCl2, which of the following represents the Ca ion in the ionic bond with Cl (after they have bonded)?

Determine the electron pair geometry / molecular geometry for the following compound: SO3

Before You Complete The Next Question: You Will Perform the following tasks: Show the camera the tables you printed. Show the camera your calculator. If you used the “Desmos Test Mode” calculator on your mobile (phone), hit “Done” and show the minutes displayed to the camera. Show the camera your clean whiteboard. Also, rescan your work area. If you fail to do the above, you will receive a zero grade for this test. How many moles are in 32.0 grams of CH4?  (molar mass = 16.0 g/mol)

Which atom contains 4 valence electrons (before bonding)?