So my chem final is tonight in like 7 hours, and I'm looking over this practice test that I've heard is very similar to last years final, few problems I don't understand how to do so hopefully you guys/girls can help, and ill forever be in your debt

 

Problem 1:

Problem 2: On this problem I assume the orbital B is the largest since principal quantum number = Size

Problem 3:

Problem 4/5: For question 27, it appears like a trigonal pyramid so the angle should be 120 degrees ? And on Problem 28, the carbon is surrounded by 4 electron domains so it would be a tetrahederal which means its sp3 hybridized orbitals ?

Problem 6/7: Problem 33 always trips me up I forget how to calculate percent yield of  a substance and for Problem 34 do I have to find the molar mass of the solute NaNo₃ ? 

 

Thanks !!!!!!

Edited December 7, 20169 yr by Orange

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Strange so when you click the spoiler it doesnt appear ? Perhaps refreshing might fix it 

 

edit- deleted spoilers hopefully it shows up now

Edited December 7, 20169 yr by Orange

The answer is H20

Watch Breaking Bad - May offer you some coaching 

 

O/T - I have no clue about chemistry - good brains here - I'm gone. 

Just did one of them really fast for you, I'll send my work. If I didn't have my physical chemistry test tomorrow I would Skype you and tell you how to do all of them.

 

 

 

Question 1: 

 

h = planck's constant

c = speed of light

 

 

 

Answer should be in (J)

 

 

Question 2: 

 

Wouldn't your highest principle quantum number be the highest shell you can reach? 

For # 34 you can relate Molarity and volume together because Molarity = moles / volume 

 

So you can use the equation M1V1 = M2V2

 

(.25 L) x (1.60 M) = (.30 L) x (? M)

 

That equation should give you the right answer

Edited December 7, 20169 yr by ThatIrishSOB

For # 34 you can relate Molarity and volume together because Molarity = moles / volume 

 

So you can use the equation M1V1 = M2V2

 

(.25 L) x (1.60 M) = (.30 L) x (? M)

 

That equation should give you the right answer

Thanks!

 

Just did one of them really fast for you, I'll send my work. If I didn't have my physical chemistry test tomorrow I would Skype you and tell you how to do all of them.

 

 

h = planck's constant

c = speed of light

 

 

 

Answer should be in (J)

Thanks alot! 

too bad im still in kindergarten and have no clue what im looking at 

Yeah I took AP Chemistry last year so I feel like I should know this stuff but I just don't 

9 should be C someone correct me if I am wrong.

 

#3 is basic chemistry and if you can't do that IDK how the fuck you're going to do the rest

 

PP already calced the joules, and the idealized chit idfk

 

I know how to figure it out if we are comparing various elements, but never seen QN asked like that.

 

33 is ez stop being a doofus

 

34 = Moles/Volume = Molarity

Edited December 7, 20169 yr by Timekeeper

9 should be C someone correct me if I am wrong.

 

#3 is basic chemistry and if you can't do that IDK how the fuck you're going to do the rest

 

PP already calced the joules, and the idealized chit idfk

 

I know how to figure it out if we are comparing various elements, but never seen QN asked like that.

 

33 is ez stop being a doofus

 

34 = Moles/Volume = Molarity

Thanks and sadly enough I dont know 3 or 33

I'm gonna go back to that chapter real fast, I have to do alot of dividing if i remember correctly

so did you solve the problem yet?

the problems answer is pm me

so did you solve the problem yet?

Had my final last night, overall wasn't as bad as I was expecting