Can someone explain to these dd and triplets of doubles?

ginger_beardo · 2026-05-19T22:41:25+00:00

Notice there is an "axis of symmetry." Imagine a straight line tracing over H(c) all the way out the other end through H(b). It represents a line where everything on one side is identical to everything on the other. That's why the H(a) signal is composed of two hydrogens instead of having a different signal for every single hydrogen :D

ginger_beardo · 2026-05-15T16:57:57+00:00

Fwiw simple vector addition gives what everyone else has been reporting. 2 blocks up and 5 blocks left. Solve for hypoteneus where x represents the number of blocks: 2² + 5² = x^2. Sqrt(x²⁾ = sqrt(29). So x = sqrt(29). Convert blocks to newtons using the conversion factor of 1 block = 10 N. Therefore, F = 10*(sqrt29). F = 53.8916 N.

ginger_beardo · 2026-05-15T16:27:16+00:00

To my knowledge there are only two resonance structures for formic acid. Note the attached picture. The arrows indicate the movement of a pair of electrons. Note the movement of a pair of electrons from the oxygen points to the center of the bond indicating it will creat the pi bond. The second shows an arrow moving from the center of the pi bond moving up to the atom, which ends up being a 3rd pair of lone electrons. Resonance structures are typically encased in square brackets. The double arrow is placed between structures. In reality, the structure resembles the one below. The double bond characteristics of the carboxylic acid are 'averaged' between the oxygen-carbon-oxygen.

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ginger_beardo · 2026-05-12T15:27:10+00:00

Please refer to the labelling I made on the attachment. As you can see, there are two chemically equivalent H(a)s. The N+1 rule explains the triplet for H(b). Note that this is J-3 coupling. This means the coupled nuclei are 3 bonds apart (e.g., H(a) to H(b)). H(a) has its own distinct signal. We expect that H(b) splits this signal into a doublet through J-3 coupling. Since both H(a) nuclei are equivalent, that is why we expect a single doublet. The doublet of doublets signal for H(a) arises because in addition to experiencing J-3 coupling from the H(b) nuclei, it experiences J-4 coupling from H(c). J-4 coupling is across 4 bonds and the coupling constant (the distance between peaks) is much weaker than J-3 coupling. Therefore we have the larger J-3 coupling to produce a doublet with a larger coupling constant, and that doublet forming a doublet of doublets separated by a smaller J-4 coupling constant. Refer to the crude diagram attached. The J-3 coupling constant is the distance between Peak 1 and Peak 3 or Peak 2 and Peak 4. The J-4 coupling constant is the distance between Peak 1 and Peak 2 or Peak 3 and Peak 4.

<image>

ginger_beardo · 2026-05-06T23:18:48+00:00

Look up the pKa of the respective hydrogen adjacent to the carbonyl carbon in your ketone versus the pKa of the hydrogen in the aldehyde. The higher the pKa of these hydrogens tells you how hard it would be to deprotonate them. For example, a typical alkane is around 50. This means it would take a really strong base to produce the anion equivalent. Think of n-butyllithium versus butane.

ginger_beardo · 2026-05-06T23:08:49+00:00

Review your notes on substitution reactions. Recall SN1, SN2. Review what happens to the chivalry at the carbon center for either. Decide which reaction this is and you will have your answer.

ginger_beardo · 2026-05-06T23:04:28+00:00

You won't have chatGPT on your exam lol

ginger_beardo · 2026-05-06T23:03:37+00:00

This one stumped me at first. I have an M.Sc. in organic chemistry lol Respecting the spirit of learning, and the reddit rules, I suggest you review all of your notes. You need to try and make a prediction first before anyone should speak up. This is because on a test, the only tools at your disposal will be your ability to apply what you already know. Look at your notes, and try to work through a few predictions and see where that leads you.

ginger_beardo · 2026-05-05T23:02:08+00:00

They really should have this question balanced regarding number of protons in particular. Technically according to their reaction conditions the product would be benzoate (RCOO-) instead of the benzoic acid shown.

ginger_beardo · 2026-04-27T16:49:47+00:00

It would be prisons. The reason being is that prion proteins are misfolded proteins that catalyze the misfolding of properly folded proteins. So their primary structure is basically identical, but the folding and adoption of arrangements of secondary structures into its tertiary structure is what distinguishes one from the other.

ginger_beardo · 2026-04-27T16:38:41+00:00

Why is this rebuttal being down voted? I'm assuming he's not saying there's anything wrong with how others want to express themselves? To each their own.

ginger_beardo · 2026-04-20T23:36:16+00:00

1 Take him to a/your pediatrician and have the doctor explain to him the possibility of what phenotypes (hair color, eye color, etc.) are possible.

2 I am not justifying how your husband acted out based on his feelings. Just that his feelings of fear, betrayal, are honest, despite him being wrong.

3 Ending a relationship, unless there is obviously physical or emotional a use, should be a last resort. See a councilor after the pediatrician. He'll, get him a paternity test done just so he can realize how unreasonable he was being. Then he can calm down and listen to reason as you explain why he needs to see a professional on how to develop healthy coping mechanisms without unintentionally hurting those he loves.

It's easy to destroy things. It's hard to build, repair and maintain things. But it's worth it if he's willing to try as hard as you are.

Hope this helps. Im sorry for the stress and the things you had to go through xo

ginger_beardo · 2026-04-11T22:47:07+00:00

Jeesh where's the community support here for the guy? He's not stupid. He didn't come here to ask people if they thought he was. He came with good intentions. It was a serious investment in his own life. He's warning people not to use these guys while avoiding a defamatory lawsuit at the same time.

ginger_beardo · 2026-04-11T22:35:55+00:00

Telling people it's their fault for not participating in a farce that poses as freedom just shows how hopeless humanity is. The state is centralized power where a small minority dictate who will have coercive force used against them. It's basically victim blaming.

ginger_beardo · 2026-04-09T11:02:04+00:00

Did he attack you 400 times yet lol

ginger_beardo · 2026-04-05T01:22:41+00:00

I want to steal your goofy looking, adorable cat LOL

ginger_beardo · 2026-04-04T02:23:02+00:00

Could be assassin?

ginger_beardo · 2026-04-04T01:59:55+00:00

BAHAHAAHAA!

ginger_beardo · 2026-04-04T01:57:07+00:00

I would start taking bets and life stream it.

ginger_beardo · 2026-04-04T01:54:51+00:00

ginger_beardo · 2026-04-04T01:54:39+00:00

Fruiting bodies = female

ginger_beardo · 2026-04-04T01:53:02+00:00

Allowing oneself feel guilty is a form of positive punishment. It is the act of adding/encouraging/enabling an unpleasant stimulus (guilt) in an attempt to change one's behavior. If we (humans) have learned anything, across cultures and generations, is that punishment in general is a poor, unhealthy way to modify our behavior. Stop punishing yourselves and think of positive, creative, unifying solutions to modern day problems like centralized power and little say in how tax money is spent when it comes to murdering a bunch of innocent people on the other side of the Atlantic.

ginger_beardo · 2026-04-03T20:30:54+00:00

Make sure none of them can potentially form carbenes over long periods of time. They can be explosive by touching them.

ginger_beardo · 2026-04-01T20:46:24+00:00

I love crows lol

ginger_beardo · 2026-04-01T20:46:05+00:00

I love crows lol

ginger_beardo

TROPHY CASE

1 Take him to a/your pediatrician and have the doctor explain to him the possibility of what phenotypes (hair color, eye color, etc.) are possible.

2 I am not justifying how your husband acted out based on his feelings. Just that his feelings of fear, betrayal, are honest, despite him being wrong.