On the 2015 exam, Q10A did not list them as functional groups.
Since it says that any functional group that is incorrect will have points taken off, I was wondering if we needed to circle to double bonds as well since they are alkenes.
Search found 46 matches
- Sat Mar 18, 2017 2:06 pm
- Forum: *Alkenes
- Topic: Are alkenes and alkynes considered functional groups?
- Replies: 4
- Views: 891
- Sat Mar 18, 2017 1:52 pm
- Forum: *Alkenes
- Topic: Are alkenes and alkynes considered functional groups?
- Replies: 4
- Views: 891
Are alkenes and alkynes considered functional groups?
Are alkenes and alkynes considered functional groups?
- Sat Mar 04, 2017 11:47 am
- Forum: *Alkanes
- Topic: Why is methyl placed after isopropyl?
- Replies: 3
- Views: 390
Re: Why is methyl placed after isopropyl?
So we don't ignore the prefix "iso"?
1.24
For #1.23 on the organic textbook, ( I can't write the question here because it is just diagrams)
Aren't the 2nd and 3rd molecule the same?
Aren't the 2nd and 3rd molecule the same?
- Sat Mar 04, 2017 11:43 am
- Forum: *Alkanes
- Topic: Diene, triene usage [ENDORSED]
- Replies: 1
- Views: 587
Diene, triene usage [ENDORSED]
When do we use diene and triene in our names?
For example, for some problems the answer key would say 2-hexene, but other times it would say ...hept-1,4-diene.
Do we use only diene and triene for cyclic molecules or something else?
For example, for some problems the answer key would say 2-hexene, but other times it would say ...hept-1,4-diene.
Do we use only diene and triene for cyclic molecules or something else?
- Sat Mar 04, 2017 11:37 am
- Forum: *Alkanes
- Topic: Neobutane vs. tetra-butane
- Replies: 1
- Views: 400
Neobutane vs. tetra-butane
On #17 on the organic workbook, the answer key says "tetra-butane". But what is the difference between that and neobutane?
- Sat Mar 04, 2017 11:36 am
- Forum: *Alkanes
- Topic: Why is methyl placed after isopropyl?
- Replies: 3
- Views: 390
Why is methyl placed after isopropyl?
Why is methyl placed after isopropyl?
- Sat Mar 04, 2017 11:35 am
- Forum: *Alkanes
- Topic: Memorizing the First Ten Alkenes
- Replies: 3
- Views: 5482
Re: Memorizing the First Ten Alkenes
To remember the first four just use this:
Monkeys Eat Peanut Butter
It's a funny little sentence that helps you memorize it.
The rest of them are the same as normal prefixes
Monkeys Eat Peanut Butter
It's a funny little sentence that helps you memorize it.
The rest of them are the same as normal prefixes
- Mon Feb 20, 2017 4:18 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Kinetic
- Replies: 3
- Views: 483
Re: Kinetic
You ALWAYS use the slowest rate.
- Sat Feb 11, 2017 10:35 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Is E a path function or state function?
- Replies: 2
- Views: 730
Is E a path function or state function?
Is E a path function or state function?
- Fri Feb 10, 2017 10:29 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagram
- Replies: 1
- Views: 233
Re: Cell Diagram
You want the HIGHEST E cell, so it will always be the larger number minus the smaller number.
So whichever has a smaller E cell potential will always be reversed.
So whichever has a smaller E cell potential will always be reversed.
- Sat Feb 04, 2017 9:29 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: How to keep track of significant figures?
- Replies: 2
- Views: 507
Re: How to keep track of significant figures?
Use the least precise number in the question. You use the least precise number to decide how many sig figs to use.
- Sat Feb 04, 2017 9:20 pm
- Forum: Balancing Redox Reactions
- Topic: Oxidation/Reduction Method
- Replies: 1
- Views: 274
Re: Oxidation/Reduction Method
I'm not sure what your first question means, but I'll go ahead and answer your second question. For electrochemistry, it is agreed that the oxidation state of O is -2, and H is usually +1 (although in some cases it can be -1), and we only know the charge of an element IF it is an ion, otherwise we w...
- Sun Jan 29, 2017 1:30 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: "Favorable" chemical reaction
- Replies: 3
- Views: 960
Re: "Favorable" chemical reaction
When delta G is negative, the reaction is favorable (spontaneous).
When delta G is positive, the reaction is unfavorable (non-spontaneous).
When delta G is equal to zero, the system is at equilibrium.
When delta G is positive, the reaction is unfavorable (non-spontaneous).
When delta G is equal to zero, the system is at equilibrium.
- Tue Jan 24, 2017 5:14 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: 8.67
- Replies: 1
- Views: 299
8.67
Calculate the reaction enthalpy: a) 3C262 (g) --> C6H6 (g) I drew the Lewis structure and added all the bond enthalpies, and then used the equation: E bonds broken - E bonds formed I found the reaction enthalpy to be -3409 kJ/ mol, while the solutions manual says -460 kJ/mol. I don't know really how...
- Tue Jan 24, 2017 5:03 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Number 57 in Chapter 8 Homework
- Replies: 2
- Views: 360
Re: Number 57 in Chapter 8 Homework
You can opt to use the equation: E bonds broken - E bonds formed to solve this problem. The enthalpy of formation of C2H2 is -1300 kJ/mol, and H2= 286 kJ/mol, and C2H6 = -1560 kJ/mol. Using this equation, you end up with: Enthalpy of Formation of C2H6= (-1300 + 2(-286))- (-1560)= -312 kJ/mol I find ...
- Tue Jan 24, 2017 4:55 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Homework Problem 8.51
- Replies: 2
- Views: 390
Re: Homework Problem 8.51
I have the same problem. Since density is g*cm^-3, I end up with an extra "g" unit that I cannot cancel out.
I don't really understand the solutions manual's way of explaining it.
I don't really understand the solutions manual's way of explaining it.
- Sun Jan 15, 2017 1:34 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Ch 8 #31 (8.31)
- Replies: 3
- Views: 802
Ch 8 #31 (8.31)
Calculate the heat released by 5.025 g of K (g) at 0.400 atm as it cools from 97.6o C to 25.0o at (a) a constant pressure and (b) constant volume. Assume that krypton behaves as an ideal gas.
Can anyone explain how to solve this?
Thanks.
Can anyone explain how to solve this?
Thanks.
- Sun Jan 15, 2017 12:47 pm
- Forum: Calculating Work of Expansion
- Topic: Comparing the amount of work done
- Replies: 1
- Views: 315
Comparing the amount of work done
How do we compare the amount of work done? Do we just disregard the negative signs when comparing the amount of work done, or do we have to take in account the direction in which the work is done?
For instance, is -343 J of work considered more work than +120 J of work?
For instance, is -343 J of work considered more work than +120 J of work?
- Sat Jan 14, 2017 1:36 pm
- Forum: Phase Changes & Related Calculations
- Topic: Most Helpful Resource
- Replies: 14
- Views: 1761
Re: Most Helpful Resource
I personally found the chemistry community to be the most helpful out of all the resources available, because it is available 24/7 and you can post whenever and wherever. Whenever you have a question, you can always post it online, and then multiple people will answer your question through different...
- Thu Dec 01, 2016 11:08 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Strength of Acids
- Replies: 1
- Views: 407
Strength of Acids
Why is HClO 2 more acidic than HBrO 2 ? Isn't the H-Cl shorter and isn't Cl more electronegative than Br, so wouldn't HBrO 2 lose the H + proton more easily? The solutions manual says something about electronegativity making the H-O bond stronger, but is anyone able to explain that more clearly? Tha...
- Thu Nov 24, 2016 3:06 pm
- Forum: Student Social/Study Group
- Topic: Help with Coordination Compounds?
- Replies: 6
- Views: 1174
Re: Help with Coordination Compounds?
How do you exactly find out if the complex has an overall negative or positive charge? You can usually tell by the name. A negative coordination compound will have the suffix "-ate" in the name; positive ones will not. You can also add up all the charges of the central transition metal an...
- Thu Nov 24, 2016 3:02 pm
- Forum: Student Social/Study Group
- Topic: Final Study Group
- Replies: 12
- Views: 1783
Re: Final Study Group
I'm interested as well!
- Fri Nov 11, 2016 11:04 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: H2O Ligand
- Replies: 1
- Views: 810
H2O Ligand
I have a question about H2O.
It has two valence electron lone pairs (4 valence electrons total), so why can't it make two polar coordinate bonds and be a bidentate ligand?
Why is it always a monodentate ligand?
It has two valence electron lone pairs (4 valence electrons total), so why can't it make two polar coordinate bonds and be a bidentate ligand?
Why is it always a monodentate ligand?
- Fri Nov 11, 2016 10:48 am
- Forum: Naming
- Topic: 17.31 [ENDORSED]
- Replies: 1
- Views: 295
17.31 [ENDORSED]
For 17.31, part d, why is the aqua is written with the O backwards, like OH2, instead of H2O?
Also, how do we determine the order in which we put the ions when given the name of the coordinate compound?
Also, how do we determine the order in which we put the ions when given the name of the coordinate compound?
- Mon Nov 07, 2016 10:31 pm
- Forum: Naming
- Topic: So lost on the naming
- Replies: 4
- Views: 594
So lost on the naming
I am completely confused about naming the coordinate compounds.
Do we need to know the latin names for all of the transition metals?
What is the order in which we put the different ligands before the ion?
Thanks in advance for your help.
Do we need to know the latin names for all of the transition metals?
What is the order in which we put the different ligands before the ion?
Thanks in advance for your help.
- Sat Nov 05, 2016 6:03 pm
- Forum: Trends in The Periodic Table
- Topic: Px py and pz
- Replies: 4
- Views: 1261
Re: Px py and pz
We generally only use this when determining hybridizations.
- Sat Nov 05, 2016 6:02 pm
- Forum: DeBroglie Equation
- Topic: Neutrons
- Replies: 4
- Views: 747
Re: Neutrons
Neutrons do have wave-like properties.
- Sun Oct 30, 2016 12:49 pm
- Forum: Ionic & Covalent Bonds
- Topic: Covalent and Ionic Character
- Replies: 3
- Views: 901
Re: Covalent and Ionic Character
The higher the difference in electronegativity, the more ionic character a molecule has. That's because the higher the difference in electronegativity, the more unevenly the electrons would be shared between them.
Hope this helps!
Hope this helps!
- Wed Oct 26, 2016 10:24 pm
- Forum: Electronegativity
- Topic: Trends in periodic table
- Replies: 6
- Views: 882
Re: Trends in periodic table
Yes, the trends do not apply to the noble gases, and sometimes they go against the trends. For instance, the electron affinity of noble gases would be negative since they don't need that extra e-.
Hope this helps!
Hope this helps!
- Wed Oct 19, 2016 8:19 pm
- Forum: Hybridization
- Topic: Building Up Principle [ENDORSED]
- Replies: 1
- Views: 417
Re: Building Up Principle [ENDORSED]
Electrons naturally repel each other, so they will fill up the empty orbitals before they fill up the already filled ones. Think of it like pairs of bus seats...you will sit in an empty pair of seats if you can. You will only sit with a stranger if there are no empty pairs of seats left, and you abs...
- Sat Oct 15, 2016 3:57 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: 2.29
- Replies: 1
- Views: 238
2.29
How many electrons can have the following quantum number:
a) n=2, l=1
b) n=4, l=2, ml=-1
c) n=2, l=1, ml= 0
d) n=7
I don't really even know how to start...please help!
a) n=2, l=1
b) n=4, l=2, ml=-1
c) n=2, l=1, ml= 0
d) n=7
I don't really even know how to start...please help!
- Sat Oct 15, 2016 3:09 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: 2.21
- Replies: 5
- Views: 438
Re: 2.21
Thank you so much for your help!
I have a much better understanding of the quantum numbers now.
I have a much better understanding of the quantum numbers now.
- Sat Oct 15, 2016 3:00 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: 2.21
- Replies: 5
- Views: 438
Re: 2.21
Thanks, that really helped.
But what if n=6, and l is equal to 0,...n-1? What would l = 5 mean?
But what if n=6, and l is equal to 0,...n-1? What would l = 5 mean?
- Sat Oct 15, 2016 2:44 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: 2.21
- Replies: 5
- Views: 438
2.21
#2.21: What are the principal and orbital angular momentum quantum numbers for each of the following orbitals: a) 6p b) 3d c) 2p d) 5f i understand how to get the n (principal quantum number), it's the same as the energy level in front of the orbital. But I'm very confused about how to get the orbit...
- Fri Oct 14, 2016 10:16 pm
- Forum: Electronegativity
- Topic: Periodic Trends
- Replies: 3
- Views: 623
Re: Periodic Trends
Most periodic trends such as electronegativity and ionization energies goes up and right, only atomic radius is the exact opposite; it goes left and down. That's how I remember it.
Hope this helps!
Hope this helps!
- Fri Oct 14, 2016 10:11 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic Vs Covalent bonds
- Replies: 4
- Views: 723
Re: Ionic Vs Covalent bonds
Ionic bonds are much stronger than covalent bonds just because of the fact that the high difference between their electronegativity. An ionic compound is formed between nonmetals and metals, and a covalent compound is formed between two or more nonmetals. An easy way to remember is that you know met...
- Fri Oct 14, 2016 10:05 pm
- Forum: Lewis Structures
- Topic: Lewis Structure Octet Rule [ENDORSED]
- Replies: 3
- Views: 935
Re: Lewis Structure Octet Rule [ENDORSED]
Electrons will always fill empty shells first (Hund's rule) so make sure that you draw out the electrons on all four sides before you start pairing them. For instance, carbon will have four valence electrons, one on each side, never two together on one side because electrons naturally repel each oth...
- Tue Oct 04, 2016 9:21 pm
- Forum: Properties of Light
- Topic: HW Question Ch #27 [ENDORSED]
- Replies: 5
- Views: 1148
Re: HW Question Ch #27 [ENDORSED]
Thanks for the explanation!
It's so much clearer than the one in the solutions manual :D
It's so much clearer than the one in the solutions manual :D
- Mon Oct 03, 2016 10:56 pm
- Forum: Properties of Light
- Topic: HW Question Ch #27 [ENDORSED]
- Replies: 5
- Views: 1148
HW Question Ch #27 [ENDORSED]
A lamp rated at 32 W (1 W = 1 J * s^-1) emits violet light of wavelength 420 nm. How many photons of violet light can the lamp generate in 2.0s? How many moles of photons are emitted in that time interval? I got the first part, 32 J * s^-1 * 2.0 s = 64 J But I'm confused about the second part. I am...
- Mon Oct 03, 2016 10:48 pm
- Forum: Properties of Light
- Topic: Question about n1 and n2
- Replies: 4
- Views: 2353
Re: Question about n1 and n2
Thanks a lot for the clarification!!
The second link really helped.
The second link really helped.
- Sun Oct 02, 2016 5:44 pm
- Forum: Properties of Light
- Topic: Question about n1 and n2
- Replies: 4
- Views: 2353
Question about n1 and n2
What is n1 and n2 in the Rydberg Equation?
Is n1 the initial energy level and n2 the final energy level?
If I do that then sometimes I'd end up with a negative frequency.
Thanks in advance
Is n1 the initial energy level and n2 the final energy level?
If I do that then sometimes I'd end up with a negative frequency.
Thanks in advance
- Sun Oct 02, 2016 4:15 pm
- Forum: Significant Figures
- Topic: Rounding sig figs [ENDORSED]
- Replies: 1
- Views: 404
Rounding sig figs [ENDORSED]
If my answer is 1.987*10^-3, and I need 2 sig figs, should I write my answer as 2*10^-3 or 2.0*10^-3?
- Tue Sep 27, 2016 8:56 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: G #17 b
- Replies: 4
- Views: 1530
G #17 b
Determine the mass of CuSO 4 • 5H 2 O that must be used to prepare 250 mL of 0.20 M CuSO 4 (aq). The solutions manual says 12 g which is what I got if I set up the equation as followed and solve for x: x grams * 1 mol/249.611 * 1 L/0.2 mol = 0.250 L But isn't CuSO 4 • 5H 2 O a hydrate? Therefore the...
- Tue Sep 27, 2016 4:07 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Fundamentals G5
- Replies: 6
- Views: 1352
Re: Fundamentals G5
I finally got it!
Thanks for your help
Thanks for your help
- Mon Sep 26, 2016 11:01 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Fundamentals G5
- Replies: 6
- Views: 1352
Re: Fundamentals G5
Using the formula M1V1=M2V2 I set up the following:
(0.159338 mols Na+/L) (V1) = (2.15*10^-3 mols Na+/L) (0.250 L)
and solving for V1 I got:
V1= 3.373 * 10^-3 liters, 3.373 mL, which is different from the solutions manual (which is 13.5 mL).
Please help!
(0.159338 mols Na+/L) (V1) = (2.15*10^-3 mols Na+/L) (0.250 L)
and solving for V1 I got:
V1= 3.373 * 10^-3 liters, 3.373 mL, which is different from the solutions manual (which is 13.5 mL).
Please help!