Search found 24 matches

by Megna Patel 1I
Mon Mar 07, 2016 3:45 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Bond angle strain
Replies: 1
Views: 303

Re: Bond angle strain

Bond angle strain occurs when bond angles disagree with the ideal orientation of a molecule, thereby causing the molecule to be less stable.
by Megna Patel 1I
Tue Mar 01, 2016 11:27 am
Forum: *Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
Topic: substituent capitalization
Replies: 1
Views: 316

Re: substituent capitalization

It does not matter whether or not you capitalize the first substituent.
Prefixes are not capitalized either.
by Megna Patel 1I
Tue Mar 01, 2016 11:23 am
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Constitutional Isomers with Common Names
Replies: 1
Views: 327

Re: Constitutional Isomers with Common Names

Hi Alex!
Yes, there would be two iso groups, making it diisopropyl.
by Megna Patel 1I
Wed Feb 24, 2016 7:15 pm
Forum: *Alkanes
Topic: Types of names
Replies: 1
Views: 271

Re: Types of names

With regards to the two types of naming we learned in class, will we be asked to use one specific form when asked to name organic compounds or will we be able to choose the one we prefer. According to my TA, you should know the common names of the different branched substituents-- the ones that beg...
by Megna Patel 1I
Fri Feb 19, 2016 6:01 pm
Forum: Significant Figures
Topic: When there are fractions [ENDORSED]
Replies: 3
Views: 2755

Re: When there are fractions [ENDORSED]

Hi Rachel!

Fractions do not have significant figures, so you would look at the other values in the problem to determine how many significant figures should be in your final answer!
by Megna Patel 1I
Wed Feb 17, 2016 5:13 pm
Forum: General Rate Laws
Topic: Rate Constant "k"
Replies: 1
Views: 333

Re: Rate Constant "k"

An increase in temperature causes the reactants to collide more, which ultimately leads to an increase in the k value.
by Megna Patel 1I
Wed Feb 10, 2016 7:50 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: deciding which cell is the cathode/anode
Replies: 3
Views: 550

Re: deciding which cell is the cathode/anode

For a galvanic cell, E has to be positive. This is why you would make the cathode the more positive one and the anode the negative one. However, if the question does not say that it is a galvanic cell, such as in Question 8, you must look at the balanced equation. HF has to be on the reactant side b...
by Megna Patel 1I
Tue Feb 02, 2016 3:30 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Drawing Cell Diagrams
Replies: 1
Views: 331

Re: Drawing Cell Diagrams

It is usually written as |unoxidized species|oxidized species||unreduced species|reduced species. The order of the ions of the same state do not matter as long as they are on the correct side. Also, electrodes are placed on the ends of each corresponding side.
by Megna Patel 1I
Fri Jan 29, 2016 3:32 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Open System
Replies: 2
Views: 686

Re: Open System

It is an open system because energy and/or matter is able to escape from the system, especially in the form of gases.
by Megna Patel 1I
Fri Jan 29, 2016 3:12 pm
Forum: Balancing Redox Reactions
Topic: Mnemonic for Oxidation/Reduction
Replies: 3
Views: 1634

Re: Mnemonic for Oxidation/Reduction

Another one I learned is "LEO the lion says GER."

LEO = Loss of Electrons is Oxidation
GER = Gain of Electrons is Reduction
by Megna Patel 1I
Thu Jan 21, 2016 9:50 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Reversible vs. irreversible
Replies: 1
Views: 335

Re: Reversible vs. irreversible

The external and internal pressures in a system are equal at the beginning of a reversible expansion. The gas will increase or decrease, which will then cause a change in the pressure. The outside pressure will then adjust in order to maintain the equilibrium. In an irreversible expansion, the exter...
by Megna Patel 1I
Thu Jan 14, 2016 9:56 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Heating Curve
Replies: 1
Views: 295

Re: Heating Curve

How do the different heat capacities, smaller versus larger, change the slope of the heating curve? The larger the heat capacity, the more resistant the substance will be to heat. A substance with a low heat capacity will be heated faster, making the slope of the heating curve steeper. A substance ...
by Megna Patel 1I
Fri Jan 08, 2016 4:46 pm
Forum: Phase Changes & Related Calculations
Topic: State Property
Replies: 3
Views: 586

Re: State Property

Heat must be under constant pressure to be considered a state property due to the fact that the reactions usually occur in a vessel that is open to the atmosphere. Therefore, the pressure is kept constant because the vessel is able to adjust its size so that the pressure of the system is identical t...
by Megna Patel 1I
Sat Dec 05, 2015 7:18 pm
Forum: Polyprotic Acids & Bases
Topic: Homework Problem 12.117
Replies: 1
Views: 457

Homework Problem 12.117

The question says to write the equilibrium constant for the reaction and calculate the value of K at 298K for the reaction HNO2(aq) + NH3(aq) <--> NH4+(aq) + NO2-(aq) using the data in tables 21.1 and 12.2. In the solution manual it sets K= \frac{[NH_{4}^{+}][NO_{2}^{-}]}{[HNO_{2}][NH_{3}]} = \frac{...
by Megna Patel 1I
Sun Nov 29, 2015 12:32 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Pressure aspect of Le Chatelier's Principle
Replies: 2
Views: 644

Pressure aspect of Le Chatelier's Principle

Can somebody please explain the pressure aspect of Le Chatelier's Principle. I can't wrap my head around why it's a change in pressure due to a change in volume of a system instead of a change in pressure that drives the system to a new equilibrium.
by Megna Patel 1I
Fri Nov 20, 2015 3:03 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Methane classification
Replies: 3
Views: 623

Methane classification

Is methane considered an acid or a base? And why?
by Megna Patel 1I
Fri Nov 13, 2015 3:36 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Determining if a ligand is polydentate
Replies: 1
Views: 470

Re: Determining if a ligand is polydentate

A ligand molecule with more than one donor atom is a called a polydentate ligand. They are given specific names, depending on the number of donor atoms they contain. Bidentate ligands: have 2 donor atoms Tridentate ligands: have 3 donor atoms Tetradentate ligands: have 4 donor atoms Pentadentate lig...
by Megna Patel 1I
Fri Nov 13, 2015 3:25 pm
Forum: Naming
Topic: Prefixes and Name order
Replies: 1
Views: 264

Re: Prefixes and Name order

When you have a part of the compound that uses for example bisethylenediammine would that count as having b as the first letter or e? When naming coordination compounds, the greek prefixes are disregarded while putting the ligand names in alphabetical order. Therefore, "e" would be the fi...
by Megna Patel 1I
Fri Nov 06, 2015 3:24 pm
Forum: DeBroglie Equation
Topic: How will I know if a wavelength is too small.
Replies: 1
Views: 520

Re: How will I know if a wavelength is too small.

The wavelength detection limit is approximately 10 -15 m. If the De Broglie wavelength is smaller than this, it is not detectable and we say the object does not have wavelike properties. Also, there is no mathematical limit to how large a wavelength can be. Theoretically, the largest dimension is eq...
by Megna Patel 1I
Sun Nov 01, 2015 9:42 pm
Forum: *Shrodinger Equation
Topic: Meaning of Schrodinger Equation
Replies: 1
Views: 526

Re: Meaning of Schrodinger Equation

The Schrodinger Equation is used in regards to atomic orbitals. It is a mathematical equation that uses a wavefunction to describe the shapes of the atomic orbitals. It tells us that an electron has an uncertain position and momentum, along with wave-like properties. The equation allows us to determ...
by Megna Patel 1I
Fri Oct 23, 2015 7:15 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: electronegativity, ionic bond, covalent bond
Replies: 1
Views: 420

Re: electronegativity, ionic bond, covalent bond

The typical rule is if the electronegativity difference is between 0.5 and 1.7, the bonds are considered polar covalent. This occurs between two nonmetals and is a result of the unequal sharing of electrons between the atoms where a certain atom attracts electrons more than the other. Examples inclu...
by Megna Patel 1I
Mon Oct 12, 2015 12:59 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Why are Copper and Chromium exceptions?
Replies: 3
Views: 29756

Re: Why are Copper and Chromium exceptions?

These two elements are exceptions because it is easier for them to remove a 4s electron and bring it to the 3d subshell, which will give them a half filled or completely filled subshell, creating more stability. Since the 4s orbital has a lot of electron repulsion, it easily donates an electron to t...
by Megna Patel 1I
Mon Oct 12, 2015 12:30 am
Forum: Quantum Numbers and The H-Atom
Topic: Understanding the ml (Magnetic Quantum Number)
Replies: 2
Views: 1163

Re: Understanding the ml (Magnetic Quantum Number)

I understand that N represents the shell and that l represents the subshell, but I am not understanding what part of the electron's orbital orientation ml represents? Can we determine which value of ml corresponds to which electron, or do we just chose any value in the range determined by what l is...
by Megna Patel 1I
Fri Oct 02, 2015 12:42 am
Forum: Significant Figures
Topic: Exact numbers in the final answers
Replies: 4
Views: 839

Re: Exact numbers in the final answers

Rounding errors can accumulate quickly if you round off at each intermediate step, so it is best to simply use the stored values in your calculator in each step. Then apply significant figures when you reach the final answer.

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