11 Answered Questions for the topic chem 102

04/06/20

Satisfying Octet Rule?
Draw Lewis structures for the following compounds/ions.Decide if the compound/ion listed can satisfy the octet rule (duet rule for H), if so choose Satisfies Octet Rule from the drop down menu.If... more
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04/05/20

Finding Bond Polarity?

Rank the following bonds from least polar to most polar:Ge−FF−FK−FSe−FAs−Fleast polar  ______<  _____ < _____<  ______<  ______  most polar
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04/03/20

Finding the Identity of an Unknown Ion
An unknown ion with a charge of +1 has the following electron configuration:[Ar] 4s0 3d5 4p5What is the identity of the unknown ion?
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03/31/20

Finding the Excited State?
A hydrogen atom in an excited state returns to the ground state. The photon emitted in this process has a wavelength of 122 nm. What was the excited state of the hydrogen atom prior to returning to... more
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Chem 102 Chemistry Chem

03/30/20

Finding Frequency?
Part 1You have 0.100 mol of H atoms in the ground state. How much energy is required to transition all of the atoms from the ground state to n=5?1.26×105 JPart 2What is the frequency of the light... more
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03/08/20

Finding partial pressure at equilibrium?
One method for producing hydrogen is to react coke (mostly solid carbon) with steam to make syngas, a mixture of CO and hydrogenC(s) + H2O(g) ⇌ CO(g) + H2(g)     Kp = 0.45 at 900 K     ΔH = +131... more
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03/08/20

Finding moles of a specific product at equilibrium constant?
For the reaction:2H2O(g) ⇌ 2H2(g) + O2(g)KC = 2.40 x 10-3 at a given temperature.At equilibrium, it is found that [H2O] = 0.205 M and [H2] = 1.20 x 10-2 M.If the reaction is run in a 7.00 L... more
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02/28/20

Heat of Formation for One Mole
Find the heat of formation for a mole of carbon monoxide (CO) given: CO2(g) + C(s) → 2CO(g) ∆ Ho = 172.5 kJ C(s) + O2(g) → CO2(g) ∆ Ho = -393.5 kJ Use kJ and 3 significant figures for... more
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02/21/20

Finding Work and Value of ΔE?
Calculate the work (w) and ΔEo, in kJ, at 298 K and 1 atm pressure, for the combustion of one mole of C3H8 (g). First write and balance the equation. The products will be CO2 (g) and H2O (g).The... more
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02/20/20

Partial and Total Pressure Problem
Mixtures of helium and oxygen are used in scuba diving tanks to help prevent "the bends". For a particular dive, 35.7 L of oxygen gas at 25.0oC and 1.08 atm, and 6.33 L of helium gas at 25.0oC and... more
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01/22/20

Fill in the blank for protons, neutrons, electrons, and charge
Fill in the blanks in the chart below with the symbol, mass number, number of protons, neutrons and electrons and charge. When you enter the charges, enter them after the number, i.e. 2+ or... more
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