Numerade

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Brooke Smith

Numerade educator

2. For each of the following, describe the relationship as directly or inversely proportional: a) wavelength vs. frequency b) wavelength vs. energy c) frequency vs. energy

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Lijeesh Krishnan

Numerade educator

What is the frequency of visible light with a wavelength of 500 nm?

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George Bennett

Numerade educator

This sketch of a neutral molecule is shaded red or blue wherever the electrostatic potential at the molecule's surface isn't zero. What could the identity of the molecule be? | electrostatic potential map | possible chemical formula (check all that apply) | | :---: | :--- | | ![](https://files.catbox.moe/p977r6.png) | ? OCS | | | ? COCl2 | | | ? ICl | | | ? SO3 | | | ? H2O2 |

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Daniel Gosser

Numerade educator

Check the box next to each molecule on the right that has the shape of the model molecule on the left: model molecules (check all that apply) CH3O- BrF4- NH3 NH4+

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Sima Sarker

Numerade educator

Write the balanced equation for the reaction of copper(II) nitrate with potassium bromide. Is this an exchange reaction? If so, be sure to indicate the precipitate.

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Susan Hallstrom

Numerade educator

3. Circle the compounds that are soluble in water: NaNO3 (NH4)2SO4 CaCO3 KCl Ag2S LiBr PbI2 PbCl2 (NH4)2S AgNO3

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Angela Williamson

Numerade educator

proposed Lewis structure Is the proposed Lewis structure reasonable? .. .. N = N Yes. .. .. No, it has the wrong number of valence electrons. The correct number is: 10 No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are: * .. H - Br Yes. .. No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are: * Yes. : N ? N : No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule.