CHEMISTRY COMMUNITY

emilie liu 3G

A secondary amine is connected to two carbons

emilie liu 3G

When identifying functional groups in a molecule, why would we consider a double bonded group an "alkene functional group"? I thought that the double bond must be included in the parent chain as opposed to a functional group or substituent.

emilie liu 3G

Will we have to know tert and sec for the quiz or can we use the IUPAC names for them instead of common names?

emilie liu 3G

Yes, you use the dashes to separate words from numbers, but the example 3-ethyl-5-methyl-octane would not need a dash between methyl and octane so it would essentially be written 3-ethyl-5-methyloctane

emilie liu 3G

It should not matter which units you use in your answer as long as the value is correct and corresponds to the units you use. I noticed in the textbook that if they usually have the answers in the units that they provided in the question!

emilie liu 3G

I was wondering when we are asked to calculate standard Ecell, standard Gibbs free energy, and K for a redox reaction, when calculating K should we use: Enaughtcell= (RT/nF)(lnK) or deltaGnaught=-RTlnK or are both acceptable?

emilie liu 3G

The solution manual seems to go off the on with the one that is most strongly reducing! When looking at Appendix B, choose the one closest to the strongly reducing side, the most negative E value.

emilie liu 3G

How do we know when to raise W to the power of Avogadro's number and when not to? Also to calculate W is it the number of arrangements/states to the power of the number of particles?

emilie liu 3G

standard state is defined as 298.15K and 1atm

emilie liu 3G

You can determine which R constant to use in the problem depending on the units of the problem. The units of R should match the units in your problem.

emilie liu 3G

My chemistry professor threw sodium chloride at me! That's a salt!

emilie liu 3G

Yes, it helps to draw the Lewis structure to see whether the molecule is polar. This can be done by observing the dipole movements and seeing if they cancel out in a symmetrical molecule.

emilie liu 3G

I understand the rules of significant figures. I was asking if we simply carry all the significant figures and round at the end like usual or round at each individual step because the solution manual and practice finals derive their answers by rounding each individual step. When I followed the usual...

emilie liu 3G

When calculating pH in titrations of buffers, should we still follow the rule where we carry all significant figures and round at the end? I have been doing some practice problems using that rule and have been off a tenth or two usually. When I look at the solutions manual and practice finals, it lo...

emilie liu 3G

Cl2 is more stable because the equilibrium constant is smaller than the equilibrium constant for F2. This means that products are less favored for Cl2 than they are for F2. Thus Cl2 would disassociate less than F2 and is therefore the more stable species.

emilie liu 3G

The reason that in Pentaamminesulfatocobalt(III)chloride the (III) is included in the name but not the formula, is that the (III) represents the 3+ charge on the cobalt. You would use this charge to determine has many chlorines are attached to the compound in order to create a neutral compound.

emilie liu 3G

c.) they differ because in HF the Fluorine uses its 2p orbital to construct the orbitals while in the H2 molecule the two hydrogens use their 1s orbital

emilie liu 3G

Yes, angular is the same as bent. T-shaped is a compound with 3 bonds and and 2 lone pairs.

emilie liu 3G

Yes, they are referring to the s orbital, the donut shaped one containing a maximum of 2 electrons. The n refers to the principle quantum number aka the shell number.

emilie liu 3G

For the second question, if you look at the course reader on page 1 of the chemical bonds section, when writing the Lewis symbols for a single element like one Helium, the two electrons are paired on one side of the diagram to represent 2 paired electrons in the 1s orbital. But for more complex Lewi...

emilie liu 3G

Use the equation for dilutions: M1V1=M2V2
When substituting values you should get (.642M)(xL)=(1.00L)(0.101M)
Solve for xL

emilie liu 3G

First convert the work function of zinc from eV to joules using dimensional analysis. Because you are looking for the longest wavelength, set Ek = 0. When you substitute this into the equation Ek= hv - work function, you will get the equation hv = work function. Then, manipulate the equation c = wav...

emilie liu 3G

When calculating an empirical or molecular formula, after we convert grams to moles and divide each value by the lowest integer to calculate the mole to mole ratio, how close should we be to a whole number in order to round to the nearest whole number vs multiplying by a factor. For example, if afte...

CHEMISTRY COMMUNITY

Search found 23 matches

Re: Final 2013 5A

Alkenes as functional groups

Re: Quiz 3 Winter 2017

Re: Naming [ENDORSED]

Re: Units

Calculation K (equilibrium constant)

Re: Problem 14.25 [ENDORSED]

Using the Boltzmann Equation [ENDORSED]

Re: What is "standard" [ENDORSED]

Re: 2 different R constants?

Re: Post All Chemistry Jokes Here

Re: Polar/nonpolar [ENDORSED]

Re: Significant Figures in Equilibrium calculations

Significant Figures in Equilibrium calculations

Re: 11.45 part C

Re: Writing the formula for coordination compounds

Re: Questions 4.77

Re: What is Angular? And what is T-shaped?

Re: What is an ns-orbital?

Re: Metallic bonds, Lewis Structures

Re: Quiz Prep: Fall 2014 #4 [ENDORSED]

Re: Self Test 1.5A: Calculating longest wavelength given work function [ENDORSED]

Calculating Molecular and Empirica Formulas