More Chemistry Help Needed :)

[Orange]

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, 2016 by Orange

[Pseudo]

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[Orange]

Images aren't loading.

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, 2016 by Orange

[Kim]

The answer is H20

[OG Botter]

Watch Breaking Bad - May offer you some coaching 

 

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

[ProjectPact]

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? 

[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

Edited December 7, 2016 by ThatIrishSOB

[Orange]

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! 

[Drewyboyo]

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

[ThatIrishSOB]

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

[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

Edited December 7, 2016 by Timekeeper

[Orange]

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

[Krys]

so did you solve the problem yet?

[Scotty]

the problems answer is pm me

[Orange]

so did you solve the problem yet?

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