Search found 29 matches

by veeksha25
Sat Mar 18, 2017 7:55 pm
Forum: *Alkenes
Topic: Are alkenes and alkynes considered functional groups?
Replies: 4
Views: 468

Re: Are alkenes and alkynes considered functional groups?

This confused me too because on Q5A. on the 2013 final alkene was considered a functional group but not on 2015 Q10? So I don't get whether or not it is..
by veeksha25
Fri Mar 17, 2017 2:52 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalyst that is used and produced
Replies: 4
Views: 433

Re: Catalyst that is used and produced

Do you include the catalyst when writing the rate law?
by veeksha25
Thu Mar 16, 2017 11:18 pm
Forum: *Electrophilic Addition
Topic: Transition step
Replies: 3
Views: 410

Re: Transition step

But then if the first step's activation energy is lower than the second steps then why wouldn't it be the second step?
by veeksha25
Thu Mar 16, 2017 11:17 pm
Forum: *Electrophilic Addition
Topic: Electrophilic Addition Example in Quiz 3 Prep
Replies: 2
Views: 325

Re: Electrophilic Addition Example in Quiz 3 Prep

Also, for these reactions it will be a pi bond breaking to form two sigma bonds.
by veeksha25
Thu Mar 16, 2017 11:11 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 15265

Re: Quiz 3 Winter 2017

Iso is needed whenever you have a methyl connected to "two carbons" (methyl connected to a carbon which is connected to another carbon)
by veeksha25
Thu Mar 16, 2017 11:06 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Naming Organic Molecules
Replies: 19
Views: 1762

Re: Naming Organic Molecules

When you name cyclohexenes, can you go clockwise or counterclockwise in numbering carbons? And also, what role does the double bond play in numbering?
by veeksha25
Fri Mar 10, 2017 2:22 pm
Forum: *Alkanes
Topic: "Iso"
Replies: 3
Views: 372

Re: "Iso"

Building on the previous replies, it may be useful to know that iso- prefixes generally occur when the substituent is on the second carbon in the parent chain.
by veeksha25
Fri Mar 10, 2017 2:20 pm
Forum: *Alkanes
Topic: Naming [ENDORSED]
Replies: 92
Views: 7515

Re: Naming [ENDORSED]

If there are two methyls, for example, on Carbon number 2; then you would write it as 2-dimethyl. Similarly, if it was on Carbon #3, it would be 3-dimethyl.
by veeksha25
Fri Mar 10, 2017 2:19 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Naming Organic Molecules
Replies: 19
Views: 1762

Re: Naming Organic Molecules

The Khan Academy ones helped me a lot, especially when it came to naming alkenes and alkynes with iso- and sec- etc. prefixes, it was really helpful.
by veeksha25
Wed Feb 22, 2017 2:32 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Arrhenius plot vs. activation energy
Replies: 3
Views: 581

Re: Arrhenius plot vs. activation energy

If the slope of the line is steeper does that mean that it has a higher or lower activation energy?
by veeksha25
Wed Feb 22, 2017 2:30 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Ea and rate constant
Replies: 3
Views: 406

Re: Ea and rate constant

I've been a little confused on what k can be affected by because it is a constant. Is it affected by temperature, concentrations, and catalysts? Or are there more factors besides this?
by veeksha25
Wed Feb 22, 2017 2:26 pm
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 113
Views: 36389

Re: Rusty on High School Chem [ENDORSED]

I had the same issue and I've been using Tyler Dewitt's videos (: I'm a very visual learner so they really helped me out, especially during the thermochemistry unit.
by veeksha25
Wed Feb 22, 2017 2:24 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

Why do scientists call helium, curium, and barium the healing elements?

Because if you can't helium or curium, you have to barium
by veeksha25
Thu Feb 09, 2017 7:00 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

Why did the bear dissolve in water?

Because it was polar lol
by veeksha25
Thu Feb 02, 2017 11:28 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Entropy Integral
Replies: 1
Views: 260

Entropy Integral

A few of the problems use the integral of Cp dt/T and i'm confused as to what that is equal to; is it equal to entropy or enthalpy?
by veeksha25
Thu Jan 26, 2017 5:18 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

Why do chemists like nitrates so much?
They're cheaper than day rates.
by veeksha25
Wed Jan 18, 2017 11:59 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Help on Problem 8.25
Replies: 1
Views: 188

Help on Problem 8.25

In this problem, the heat gained by the reaction is that which is lost by the calorimeter, which made sense. But in the solutions manual when calculating q for the calorimeter in q=mCdt; the book only multiplies the C and the dt; what happens to the m?
by veeksha25
Sun Jan 15, 2017 11:14 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

I asked the guy sitting next to me if he had any Sodium Hypobromite…
He said NaBrO
by veeksha25
Mon Nov 28, 2016 10:40 pm
Forum: Properties of Electrons
Topic: Wavelength and Diameter
Replies: 1
Views: 343

Wavelength and Diameter

On one of the practice finals, it asks "Given that the diameter of a helium atom is approximately 10^-10 m; does your answer make sense?" And the answer is "since the wavelength is less than the diameter, yes it makes sense." I don't remember reading about this, is this a princip...
by veeksha25
Wed Nov 23, 2016 8:30 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

If a bear in Yosemite and a bear in Alaska both fell in water, which one would dissolve faster?
The one from Alaska, it's polar
by veeksha25
Mon Nov 21, 2016 10:22 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

Two chemists go into a bar. The first one says "I think I'll have an H2O." The second one says "I think I'll have an H2O too" — and he died.
by veeksha25
Thu Nov 17, 2016 1:58 pm
Forum: Naming
Topic: Polydentates
Replies: 4
Views: 486

Polydentates

For carbonato, why is the molecule a bidentate and not a tetradentate even though there are four oxygens with lone pairs available for bonding?
by veeksha25
Thu Nov 10, 2016 6:58 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 826128

Re: Post All Chemistry Jokes Here

Q: When one physicist asks another, "What's new?" what's the typical response?
A:C over lambda.
by veeksha25
Fri Nov 04, 2016 1:06 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Shapes
Replies: 6
Views: 518

Re: Shapes

Yes, we do. The lone pairs are vital in determining VSEPR shapes because the repulsion causes a change in shape, and thus, bond angle. For example, many molecules have bond angles of "less than" (180, for example) because even though the atoms may seem to be 180 degrees apart, in reality t...
by veeksha25
Fri Nov 04, 2016 1:06 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Shapes
Replies: 6
Views: 518

Re: Shapes

Yes, we do. The lone pairs are vital in determining VSEPR shapes because the repulsion causes a change in shape, and thus, bond angle. For example, many molecules have bond angles of "less than" (180, for example) because even though the atoms may seem to be 180 degrees apart, in reality t...
by veeksha25
Sat Oct 22, 2016 7:42 pm
Forum: SI Units, Unit Conversions
Topic: Sig Figs [ENDORSED]
Replies: 16
Views: 1801

Re: Sig Figs [ENDORSED]

If a number is written in scientific notation with a zero, for example 5.60*10^4, then does only the one 0 count as significant or would it have 3 significant zeros because of the 10^4?
by veeksha25
Fri Oct 14, 2016 7:04 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic Vs Covalent bonds
Replies: 4
Views: 536

Re: Ionic Vs Covalent bonds

The type of bond depends on how big the electronegativity difference is between the two atoms. A smaller difference in electronegativity is generally a covalent bond, whereas a larger difference is an ionic bond. Above 2.0 difference between the to bonding atoms leads to an ionic bond and below lead...
by veeksha25
Fri Oct 07, 2016 7:15 pm
Forum: General Science Questions
Topic: Mass of an electron
Replies: 3
Views: 747

Re: Mass of an electron

Binding energy is the energy that bounds the electron to the metal. The threshold energy is the minimum energy necessary to eject an electron from the metal surface.
by veeksha25
Fri Sep 30, 2016 7:55 pm
Forum: Significant Figures
Topic: Basic Sig Figs
Replies: 13
Views: 914

Re: Basic Sig Figs

Trailing zeros, as well as leading zeros, both don't count as significant figures because they are simply placeholders in the number. However, if there is a decimal, then the zeros do count as significant. For example, 400 has only one significant figure because the zeros are just placeholders; but ...

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