CHEMISTRY COMMUNITY

chris2E

The methyl would be placed before the methylethyl because methyl occurs first alphabetically.

chris2E

The bicycloalkane is beyond the scope of what we need to know for Chem 14B, we shouldn't have to worry about naming it until 14C. Also, problem 1.18 isn't one of the listed problems that is recommended, so in terms of preparation for this course you should be fine without it.

chris2E

Can someone help me with #3 I don't understand how both of them are nucleophiles? Are you referring to #6? Nucleophiles are species rich in electrons. For the benzene ring, this electron richness comes from its double bonds. For CH_{3}OCH_{3} the oxygen in the center of the compound can only be att...

chris2E

They're just for reference, on an exam it'll either explicitly state to give the IUPAC name or it'll simply say to name the compound (in which case either the IUPAC name or common name is acceptable).

chris2E

Is there a reason why number six's answer has three significant figures despite the given concentration 0.35M having two significant figures? Do we not bother with sig figs when ln is involved?

chris2E

Adding on, some examples of intensive properties include specific heat capacity and standard reduction potential, whereas examples of extensive properties include entropy, enthalpy, and Gibbs free energy. Standard reduction potential E^{\circ} being an intensive property is the reason why for redox ...

chris2E

For \Delta H{_{rxn}}^{^{\circ}}^ it's fine for your final answer to be in either kj or kj/mol. Here the mol in kj/mol is only referring to the amount of heat being absorbed or released per mole of reaction . In other words, if the reaction is being carried out with its current stoichiometric coeffic...

chris2E

It's convention for the anode to be on the left and the cathode to be on the right, Anode||Cathode. If the cell diagram is given in a problem, or it asks you to construct a cell diagram, then you can assume that the diagram will follow this convention. This is particularly important when given a cel...

chris2E

To add to that, when asked to build a cell diagram, we put inert electrodes such as Pt(s) at both ends whenever both the oxidation and reduction species are in the same solution (for example, when both are aqueous).

chris2E

Hi, I had some questions about sig figs.

For #1, shouldn't the answer be 310.J instead of 310J since both 254J and 564J have three significant figures?

For #10, shouldn't the answer be 0.7J/K instead of 0.683J/K since both 200J and 20°C have one significant figure?

chris2E

If you're looking for a problem that incorporates any of U=3/2nRT; Cv=3/2R; and/or Cp=5/2R, take a look at problem 8.31 in Chapter 8!

chris2E

Could it be because the standard enthalpy of formation of an element in its most stable form is zero, and H+ is in its most stable form because it's only made up of one element?

chris2E

There is a table with those values on page 281 in the textbook!

chris2E

Why was the non-metal kicked out of the orchestra?

It was a poor conductor!

CHEMISTRY COMMUNITY

Search found 14 matches

Re: ORDER OF SUBSTITUENTS

Re: 1.18

Re: Quiz 3 Winter 2017

Re: Common Names

Re: Quiz 2 Winter 2017

Re: Energy Extensive or Intensive?

Re: Units When Using Bond Enthalpies

Re: Writing Cell Diagram?

Re: 14.11

Re: Quiz 1 Preparation Answers

Re: Ideal Gases Formula Pt. 2

Re: Enthalpy of H+ protons

Re: Ch. 8 Number 31

Re: Post All Chemistry Jokes Here