CHEMISTRY COMMUNITY

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what was the answer to question 7 on the test?

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steam at 100 C has lots more energy than water at 100 c since it requires more energy to have the phase change from liquid to gas

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steam at 100 C has lots more energy than water at 100 c since it requires more energy to have the phase change from liquid to gas

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For this one Q= [H+]^s[HCl]^2/[Pressure of H2]

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I believe that a) 3+ and b)Fe is being oxidized

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it is an isolated system which means that the volume is constant and matter and energy can not be exchanged

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what is the atomic symbol of confusion?

Um

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so in the book q=C(deltaT), on the equations given for the tests, there is an equation that gives q=nC(deltaT). How do you get the n inserted? the only equation that I can come up with is q=n(Cmolar)(deltaT) with an n value.

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Why do chemists like nitrates so much?
They're cheaper than day rates.

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Is there a curve to the class, and what percent would give an A?

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I slapped my neon that one

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Did anyone get mother second one on the test? What is the correct way to do it

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Is there class on3/16/18

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How do you determine which reaction is the slowest and when to add or subtract it from the others. Basically, I need help understanding all of 15.8.

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how would I solve 15.3 part C?

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when can the rate law be negative such as on pg 621?

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what are the proper units for here, first, and second rate law orders?

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Ecell=Ecell*-RTlnQ/nrF

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How do you write each of these when given the other, and how do you determine what's on the left and right side, and what is the cathode and anode?

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Why is it that when you switch the half redox equation from Ag^+ + e= Ag to Ag= Ag^+ +e the E=+0.80V doesn't also switch to E=-0.80

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Did anyone get the worked out answer for question 7?

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How do you work out and get the answer to question 6 on the test?

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Your a 10? Maybe on a pH scale because your basic

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Can someone explain the difference between delta S and delta U, and when and how to use each one?

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Energy can not be created nor destroyed

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The answer is supposed to be in an energy unit, it's just a conversion to get the answer in Joules and cancel out any unnessasary units

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What topics and sections will be covered for the midterm?

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What is the chemical formula for banana?
BaNa2

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Why do chemists like nitrates so much?
They are cheaper than day rates

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In the book it shows that q=cΔT=mCsΔT and q=nCmΔT, would this also mean that q=CΔT=nCmΔT? If not, then why is that?

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I had to make this bad chemistry joke because all the good ones argon

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Did you hear about the man that got cold down to absolute zero?
He’s oK now

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You can’t trust atoms, they make everything up

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Did you hear that oxygen went on a date with potassium? It went OK

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For Ch. 11, I was told that K can only be used for gases and any solid or liquid could not be put into the equation. Is this true for Kc and all the other K values in Ch. 12, or do another set of rules govern both Kc and Ch. 12 K constant values?

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Why is the answer kc= [co2][NH3]^2 instead of
kc=([co2][NH3]^2)/[NH4(NH2CO2)] when the second is the proper formula for the kc constant

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Why is it than in a) the x^2/(.2-x)=ka becomes (.2)ka=x^2 but in b) x^2/(.2-x)=ka becomes
(.2-x)ka=x^2

In one case, the x in (.2-x) is assumed to be zero and in the other, it’s assumed to have a value. Why is that?

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What is the difference between the two, and what do each mean/ tell?

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Are you made of copper and tellurium? Because your CuTe

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In chapter 12, when the book refers to acids and bases, which definition of acids and bases does it refer to? If it is referring to another type, will it state the specific definition of an acid and base it is talking about?

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What is the difference between the overall equation, complete ionic equation, and the net ionic equation and how do you do each?

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What chapter will the final most heavily emphasize?

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What is the difference between pH and pOH, what do they do, and how do you calculate them?

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That was sodium funny

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In the syllabus it states that we need at least a 50% to pass the class. What letter grade does that guarantee, and is there any sort of curve in for chem 14a?

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That the wavelength is able to be measured in an experiment. Large objects do not have measurable wavelike properties

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Is determining if a molecule is polar or non polar just trying to figure out if the overall effect of the charge is equal in all directions, and if so then it it non polar but if not then it's polar?

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How do you know what atom is going to be the center atom, or when two atoms will alternate?

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What kind of dogs do chemists have?
Laboratory retreavers

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What are the maximum and minimum allowable numbers for n, l, and ml. How do I determine this? And if l=3 then does that mean ml= -3, -2, -1, 0, 1, 2, 3?

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How do we find ml and what does it tell us? And how to determine an acceptable ml

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Mom when she's mad: "I've got my ion you"

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How are you able to tell which order to put the atoms in when writing out a chemical equation. An example would be sucrose with a C12H22O11, why would it not be H22O11C12. What dictates the order the atoms go in for this molecule and all the others?

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