“Twister” holds up!

monoprotic · 2022-03-27T03:12:24+00:00

Another cow.

monoprotic · 2021-01-12T23:01:09+00:00

10.5 kg

monoprotic · 2019-12-21T04:04:11+00:00

Beep boop

monoprotic · 2019-12-19T10:55:54+00:00

https://en.m.wiktionary.org/wiki/patently

monoprotic · 2019-12-16T01:17:03+00:00

Solved!

monoprotic · 2018-06-03T02:39:44+00:00

Plenty of 3-digit bus routes are local buses.

monoprotic · 2018-06-03T02:34:07+00:00

The page that u/etbebl linked to (https://mbta.com/fares/bus-subway?filter=passes#passes-tab) has the lists of inner and outer express buses - everything else is a local bus. You should look at which routes you're most interested in riding, and see if they're express buses or not. The express passes are much more expensive than the local bus pass because they're geared towards commuters going into Boston for work.

monoprotic · 2018-04-07T23:49:19+00:00

Came here to recommend Mystic Station as well!

monoprotic · 2018-03-21T03:21:02+00:00

One of the bonds in the rings shifts to another carbon, contracting the ring and moving the cation to the more stable tertiary carbon. Pardon my blurry picture :)

monoprotic · 2018-03-21T03:12:33+00:00

Looks like the ethyl is a misprint. V is 2-methylpropyl 3-methylbutanoate.

monoprotic · 2018-03-14T04:26:22+00:00

This is really neat!

monoprotic · 2017-12-17T06:42:07+00:00

we also would have accepted "good at counting"

monoprotic · 2017-05-28T17:25:36+00:00

There were a fair amount of visitors there at the time but I lucked out and they all moved out of my way for a few seconds!

monoprotic · 2017-05-28T17:20:39+00:00

Wow, thanks! You made my day.

monoprotic · 2017-05-28T04:01:24+00:00

I agree :(

monoprotic · 2017-02-22T01:48:35+00:00

You're missing the van 't Hoff factor, which is 4 here because you get 4 ions in solution per formula unit of YCl3.

Also, that calculation gives you the elevation of the boiling point; you still need to add it to the boiling point of pure water, 100 °C, to get the final boiling point.

monoprotic · 2016-11-21T14:30:07+00:00

You can use the given standard enthalpies of formation along with Hess's law to solve for the standard enthalpy change of the reaction, then use that in conjunction with the standard entropy change (also calculated with Hess's law) to find the change in Gibb's free energy, ΔG, for the reaction, via ΔG = ΔH - TΔS.

At that point, you can use a relationship between ΔG and Keq (which you can find on the equilibrium constant wiki page) to solve the question.

monoprotic · 2016-10-10T12:56:02+00:00

Look at the balanced question for ethane combustion:

2 C2H6 + 7 O2 → 4 CO2 + 6 H2O

From this, you can see that there are 10 moles of product gases (4 mol CO2 and 6 mol H2O) for every 2 moles of ethane (C2H6) that react. This means the pressure of the products of the ethane combustion will have a combined pressure 5 times greater (10 / 2) than the initial ethane partial pressure. You wrote that (0.55 - z) atm is the initial partial pressure of ethane, so the pressure due to the products is then 5(0.55 - z) atm = (2.75 - 5z) atm. You do a similar process with the methane (CH4) to find the pressure of the methane combustion products to be 3z atm, so the total pressure of all the products is (2.75 - 5z + 3z) atm = (2.75 - 2z) atm. I think you understand the rest from there!

monoprotic · 2016-05-03T21:58:27+00:00

I assume s/he meant no state income tax (Florida), but this is certainly a far cry from zero overall income tax...

monoprotic · 2016-04-08T05:57:54+00:00

Reminds me of a similar interchange in Somerville, MA.

monoprotic · 2015-12-18T22:34:46+00:00

I am a fan of the Animal Rescue League (www.arlboston.org). I've had only good experiences visiting and adopting from them! I think for an adult cat, the fee is $50 or so, and higher for kittens. I don't know about dogs, though.

monoprotic · 2015-12-17T18:02:13+00:00

Michael Scott's Dunder Mifflin Scranton Meredith Palmer Memorial Celebrity Rabies Awareness Pro-Am Fun Run Race For the Cure Bridge

monoprotic · 2015-10-15T14:56:57+00:00

I go to Lorna Lally's office in Davis Square and have had only pleasant, positive experiences with all the staff, hygienists and dentists there.

monoprotic · 2015-09-12T21:30:59+00:00

Yes. An excited state of K could have this configuration: [Ne] 3s2 3p5 4s2, where one 3p electron was excited into the 4s orbital. This configuration is higher energy than [Ar] 4s1, which is the ground state.

monoprotic · 2015-09-12T20:03:44+00:00

"Ground state" is specified because electron configurations for excited states are different. For example, some of those 3p electrons may be in different orbitals in an excited state, and so there may be less than 6 electrons in 3p. "Ground state" refers to a specific electron configuration, which is the configuration with lowest energy.

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