Search found 19 matches

by ariana_cruz_1C
Fri Mar 17, 2017 7:17 pm
Forum: *Alkanes
Topic: How to name the Alcohol
Replies: 4
Views: 516

How to name the Alcohol

In the organic textbook, it names alcohols, for example, 2-propanol, but on the practice finals it names them more like propan-2-ol

Is one method preferred for the final or does it not matter?
by ariana_cruz_1C
Fri Mar 17, 2017 5:16 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Cis Trans
Replies: 3
Views: 488

Re: Cis Trans

Just to add on, you also want to look at if the two priority groups on the cyclohexane are axial or equatorial. If they are both axial up or both axial down /both equatorial up or both equatorial down, it will be Cis. If one priority group is axial up and the other is axial down then it is considere...
by ariana_cruz_1C
Fri Mar 17, 2017 5:12 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Chair vs. Boat
Replies: 2
Views: 244

Re: Chair vs. Boat

Chair conformation is more stable than the boat confirmation. In the boat confirmation the hydrogens are bumping into each other (flagpole interactions), therefore causing steric strain. Chair conformation has no steric strain because no atoms are bumping into each other, the H on the adjacent C is ...
by ariana_cruz_1C
Fri Mar 17, 2017 5:06 pm
Forum: *Cycloalkanes
Topic: 2015 Final Q9A
Replies: 1
Views: 342

2015 Final Q9A

Can someone explain how to name the second structure in this question?

It's 1-(3-chlorocycloheptyl)-2-methylpropan-2-ol

I'm confused why it was named in that order. Where did they start numbering? What does the 1 represent in the beginning? & which carbon chain was seen as the longest/shortest?
by ariana_cruz_1C
Tue Mar 07, 2017 1:18 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 14433

Re: Quiz 3 Winter 2017

Jocelyn_Dao_2N wrote:Why is the answer for number 4, 4-butyl-1,2-dimethylcyclohexane and not 1,butyl-3,4-butylcyclohexane?

remember we want to start numbering wherever we could get the lowest number, so in 4-butyl-1,2-dimethylcyclohexane (4+2+1 gives us 7) whereas 1,butyl-3,4-butylcyclohexane (4+3+1 gives us 8)
by ariana_cruz_1C
Sun Mar 05, 2017 8:26 pm
Forum: General Science Questions
Topic: Types of reactions
Replies: 3
Views: 385

Re: Types of reactions

How do we distinguish which of these reactions is happening? Any tips?
by ariana_cruz_1C
Sun Mar 05, 2017 8:19 pm
Forum: *Alkanes
Topic: Naming [ENDORSED]
Replies: 92
Views: 7255

Re: Naming (pg 93 course reader) [ENDORSED]

I'm not sure if this is an obvious answer but on page 93 of the course reader what do the numbers (1,2,2) in 1-Bromobutane, 2-Chlorobutane, &
2-Iodobutane mean?
by ariana_cruz_1C
Tue Feb 21, 2017 1:07 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 2 Winter 2017
Replies: 160
Views: 14093

Re: Quiz 2 Winter 2017

ariana_cruz_1C wrote:Hi, can someone show me how they did #7, I know you use the first order integrated rate law, but when I work it out I am not getting the answer that is posted.



nevermind!
by ariana_cruz_1C
Tue Feb 21, 2017 12:11 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 2 Winter 2017
Replies: 160
Views: 14093

Re: Quiz 2 Winter 2017

Hi, can someone show me how they did #7, I know you use the first order integrated rate law, but when I work it out I am not getting the answer that is posted.
by ariana_cruz_1C
Tue Feb 14, 2017 8:36 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Midterm 2013 Question 3A
Replies: 4
Views: 427

Re: Midterm 2013 Question 3A

Hi, I am still uncertain to how they got 2259 J/g for delta_h vaporization of water when the formula sheet shows its 40.7 kgxmol-1.
So exactly was that calculated ?


Thanks in advance !
by ariana_cruz_1C
Tue Feb 07, 2017 2:38 pm
Forum: Balancing Redox Reactions
Topic: 14.5 Basic Solutions
Replies: 2
Views: 226

Re: 14.5 Basic Solutions

Okay I see thank you!
by ariana_cruz_1C
Tue Feb 07, 2017 12:21 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Homework Problem 14.9
Replies: 1
Views: 171

Re: Homework Problem 14.9

Hi, so I'm pretty sure to get 2 moles of electrons you split them into half reactions first. So you initially have 2Ce4+ = 2Ce3+ On the left side you have a charge of 8+ (2 x 4+) and on the right you have a charge of 6+, so you need 2 more electrons to balance it out. In the second half rxn you init...
by ariana_cruz_1C
Mon Feb 06, 2017 10:30 pm
Forum: Balancing Redox Reactions
Topic: 14.5 Basic Solutions
Replies: 2
Views: 226

14.5 Basic Solutions

Hi, im not sure if this is an obvious answer, but in comparing 14.5 (a) and 14.5 (c) I am a bit confused as to why some H2O's cancel out from both sides and others don't. For example in part (a) you have the FINAL balanced reaction 6OH- + 3H2O + Br- = BrO3- + 6H2O + 6e- and you're left with H2O on b...
by ariana_cruz_1C
Tue Jan 31, 2017 11:14 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 12598

Re: Quiz 1 Preparation Answers

804748473 wrote:If number 11 was on a quiz, would we be given the specific heat capacity of water?





It's on our formula sheet so I assume so!
by ariana_cruz_1C
Tue Jan 31, 2017 11:14 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 12598

Re: Quiz 1 Preparation Answers

Why in #5 do we need to flip the reaction 2H2 + O2 = 2H2O and not the other ones ?
by ariana_cruz_1C
Tue Jan 31, 2017 6:01 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 12598

Re: Quiz 1 Preparation Answers

Can someone explain why in #11 does q go from -23.8 to 23.8?
by ariana_cruz_1C
Tue Jan 24, 2017 5:18 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.99 Heat Capacity
Replies: 1
Views: 234

8.99 Heat Capacity

Hi I am a bit confused as to why in the solutions manual, the heat capacity used in this problem is negative (-4.184).

The problem says to assume the molar heat capacity is the same as water, so initially I thought that would be positive?
by ariana_cruz_1C
Wed Jan 18, 2017 6:26 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Intensive vs. Extensive [ENDORSED]
Replies: 1
Views: 186

Intensive vs. Extensive [ENDORSED]

Hi, this probably simple, but I am a bit confused on difference between an extensive and intensive property?
I know heat capacity is an extensive property because the heat required depends on the amount of substance, but what makes an intensive property?
by ariana_cruz_1C
Tue Jan 17, 2017 3:40 pm
Forum: Phase Changes & Related Calculations
Topic: Quiz Date? [ENDORSED]
Replies: 2
Views: 270

Re: Quiz Date? [ENDORSED]

Hi, so in the course reader it says Quiz 1 will start January 31 in your discussion section. So your quiz will be within that week.

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