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Let's see what makes a molecule chiral and how to find all of the chiral

centers. Hello everyone, I'm Melissa Maribel your personal tutor and let's start with

understanding what a chiral molecule is. If a molecule is chiral it means there

is no line of symmetry the left side is not the same as the right and the

molecules mirror image is different and nonsuperimposable meaning we cannot

perfectly align the molecules on top of each other. A molecule is achiral if

there is a line of symmetry within the molecule, the left side is the same as

the right side which is why it's achiral.

Let's do another example and see what molecules are chiral or achiral if we

were to cut the middle of each molecule we would see that the top and bottom

parts of this first molecule are not the same so there is no line of symmetry

making it a chiral molecule. However, the second molecule does have a line of

symmetry since the top and bottom parts of the molecule are the same making this

an achiral molecule moving on to chiral centers a chiral center is an

atom that is attached to four different groups, we represent a chiral center with

an asterisk. When an atom has a double or triple bond it cannot be a chiral center

since there are not enough groups. For example, this carbon is not a chiral

center because there are only three different groups and we need four

different groups for this to be a chiral center. Let's identify the chiral centers

in these two examples looking at this carbon we will see if there are four

different groups surrounding the central carbon we have OH this carbon chain, a

totally different carbon chain with an OH group and a hydrogen so both of these

carbons are our chiral centers note an achiral molecule can still have chiral

centers as shown here. This entire molecule does have a line of symmetry

and both parts are the same making it achiral.

In this example there are actually no chiral centers because there are two

methyl groups and remember all of the groups have to be different. Note: a

chiral molecule does not have to have a chiral center there is no line of

symmetry within this molecule making it chiral.

Okay to make sure you fully understand everything we just covered try these two

questions and we'll go over the answers in just a little bit. For question one

identify the chiral centers. To find the answer to question one let's check each

carbon and see if there are four different groups. Hmm nope not enough

groups not enough groups for the next carbon this carbon has one two three

four different groups so yes this is a chiral center. Next remember double or

triple bond will never be a chiral center so this one is not a chiral

center. This next carbon doesn't have enough groups the next carbon has one

two three and four different groups so yes this is another chiral center and

this end carbon is a common mistake it has enough groups but there are two of the

same groups our methyl groups but we need all four groups to be different so

this is not a chiral center. There are only two chiral centers in this molecule.

For question two label each molecule as chiral or achiral

To find the answer to question two remember we are looking for lines of

symmetry, if there is a line of symmetry within the molecule then it's achiral

like this first one is. Here is another hidden line of symmetry we can count the

number of carbons on either side and see that we can cut this molecule in half

and it would be the same since there are 1, 2, 3 carbons on the left and 1, 2, 3

carbons on the right making this molecule achiral. Now for the remaining

molecules there is no line of symmetry no matter how we try to cut them down

the middle they are never the same so these both are chiral.You can find other

helpful videos right here and if you would like additional homework help

tutoring or other resources you can find that all in the description box and

remember stay determined you can do this

For more infomation >> How to Find Chiral Centers & the Difference Between Chiral vs Achiral Molecules - Duration: 4:51.

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Double Chocolate Muffins _ difference between cupcake and muffin - Duration: 6:36.

hi everyone this is Cafeccino I'm Ramsha Nadeem

today's video is about Chocolate Chunk muffins also we'll be discussing some

differences between a cupcake and a muffin because most of us mistook them

and consider them as the same so we'll be discussing the differences as well

into a ball cracking three eggs and give them a little whisk

once that's done add in granulated sugar into it and give them a nice whip now

all the recipe ingredient list along with your quantities I mentioned in the

description box below so you can go and check it out over there so after adding

the sugar into your eggs just whisk it until it gets light in volume paler in

color and fluffy in texture so all these three qualities combined together make

up a term which is called a ribbon stage in our baking language so it looks

something like this it will be almost like pale white in color and when you

will lift up your beaters it will form a ribbon something like this so you can

see it will be flowing beautifully like a ribbon that's our ribbon state done

now into a clean separate bowl add in some cream I'm using whipping cream but

you can like feel free to use double cream heavy cream regular cream or

whipping cream it's all up to you and give it a whisk until it's nice and

slightly thicker now as I'm using whipping cream it will increase in

volume and get a bit more thicker but if you are using normal cream it might not

get thicker that will be fine as well add in some Dutch processed cocoa in it

feel free to use normal cocoa as well but I would highly highly recommend you

guys to use Dutch process as you can see the color of it it's beautiful the color

the flavor the smell the aroma everything is so much intense

and you get the best chocolatey flavor out of Dutch processed so try to invest

in Dutch processed once and you will never switch back and personally I

almost use in every single recipe I use - process instead of natural cocoa

because it tastes you know it tastes more like chocolate and that's what we

need mix up your cocoa in the cream and this will get instantly so so thick it

will almost look like a frosting and by the way this is not frosting this thing

is going in our egg mixture in our muffin mix because muffins are not

frosted that's the major major difference which he can identify easily

muffins are never frosted cupcakes are frosted and decorated and cupcakes are

actually mini cakes so they are miniature cakes or miniature desserts

and they are served in the form of dessert they are a dessert and muffins

are actually belonging of bread family they are that sounds like weird but

muffins are from bread family and they are served in breakfast mostly they are

not Frost but there may be you might find a drizzle of some granulated sugar

or some nuts and chunks of chocolate on top of a muffin which is really common

add in some coat of just mix those two things first the cream and the egg

mixture I also had in some plain flour and baking powder give it a quick mix

and add in chocolate chunks into it chocolate chunks always gives a nice

dimension I always prefer using chunks instead of chocolate chips you will see

in every recipe of mine also add in some extract I'm using hazelnut extract but

feel free to use vanilla extract as well if he is a loved one is not available

folding the chocolate chunks in the very end and as you can see the batter is

quite thick that's the difference the batter of the muffin is mostly thicker

than comparatively to the cup take better and just because of the

thickness and the density of the batter the chocolate chunks won't sink which is

a great thing so you won't be having chocolate chunks bits of chocolate lying

at the bottom burnt from the base of your cake muffin

yeah line your muffin tray or cupcake tray

whatever you call it with your liners and then spoon the spoon the batter into

them now one more difference which we do while

baking cupcakes and muffins is we fill in the batter while making cupcakes we

fill in like 3/4 of a better and we leave 1/4 of a room to erase them but

while making muffins I prefer personally to fill it all the

way to the top because when the rises they get a really nice beautiful dome on

top and that's because we fold them all the way to the top also adding in some

chocolate chunks on top these are completely optional I have not mentioned

them in the description box so if you want to add them chop some extra

chocolate and then top it on top once that's done bake these into the

preheated oven they won't take too much time 20 minutes max and 15 to 20 minutes

is like the average time of their baking and bake them in the preheated oven at

180c and you can see how the looks from

inside the chocolate from the top is melted also from the inside these

muffins are really light and not dense like other muffins and this recipe is

basically tested like I'm making these from like past three to four years so

this is fully foolproof and hope you liked the tutorial subscribe for a new

video every Friday do follow me on Facebook and Instagram click here for

the cupcake mint cupcake recipe and here for the latest uploaded videos and as

always eat drink and think bye guys

For more infomation >> Double Chocolate Muffins _ difference between cupcake and muffin - Duration: 6:36.

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Cristiano Ronaldo: Paulo Dybala reveals the difference between Lionel Messi and Ronaldo - Duration: 3:22.

 The Juventus attacker plays his club football with Cristiano Ronaldo and lines up alongside Lionel Messi for Argentina

 Both Messi and Ronaldo are five times Ballon D'Or winners and are commonly regarded as two of the best players to ever play the game

 And while he has only recently linked up with Ronaldo, Dybala said he feels privileged to play with both the Portuguese and Messi

 "Between him and Messi there are no differences, they are two phenomenal," Dybala told Italian newspaper Corriere della Sera

Cristiano Ronaldo: Juventus boss makes Paulo Dybala admission Cristiano Ronaldo: UEFA make red card decision ahead of Man Utd clash  "And I'm lucky to be the only one in the world who can play and learn from both

" The 24-year-old scored his first goal of the season in the 2-0 victory against Bologna on Wednesday

 Ronaldo, 33, joined the Serie A champions from Real Madrid in the summer for £88

3 million. The club's record signing - who has netted three times in seven appearances for the Old Lady since his switch - was not on the scoresheet against Bologna

 But Dybala added he has been surprised by his Juventus team-mate Cristiano Ronaldo since his arrival in Turin

 "The most surprising aspect of Cristiano is the intensity with which he trains but also his desire to win," added the Argentinian attacker

 Ronaldo learned yesterday that he would be eligible to play for Juventus against former side Manchester United following his red card in the Champions League

 The Portugal captain was sent off against Valencia for pulling the hair of opponent Jeison Murillo

 And while there were fears his suspension could be lengthened, Ronaldo will be available to face his old employers both home and away

Cristiano Ronaldo: Juventus claim made after Real Madrid transfer FIFA 19: Best shooting players in FUT confirmed – Messi, Ronaldo top  And Juve manager Massimiliano Allegri believes 'it is right' Ronaldo will feature against United

 "I'm happy, it's right that he gets to play against Manchester United," Allegri told reporters in his pre-match news conference ahead of facing Napoli on Saturday

 "He's doing well, even in [the game against] Bologna he had a good game. It's right that he plays for the team, just as the team plays for him

 "Then we have to improve in some things, we have to serve him better, but we are together recently, we have all the time to improve

"

For more infomation >> Cristiano Ronaldo: Paulo Dybala reveals the difference between Lionel Messi and Ronaldo - Duration: 3:22.

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UM-Dearborn Difference Makers 2018: Faculty Connection - Duration: 1:32.

The feeling that I had when I came to UM-Dearborn was one of immediate

community and it was one where I felt like I had a chance to really connect with professors.

And I feel like those have provided lasting relationships that

I can build on in the future.

I really appreciate everything that the

staff here has done, that the professor's have done to further my education, to

speak with me one-on-one, to help develop my ideas, and that develop my intellect as a student.

Right now I'm currently working with this professor and sociology

department on a paper that examines disadvantaged college students and the

successes and failures of disadvantaged college students. So we are looking at

what enables disadvantaged students in terms of income and race and a few

other demographic variables. What enables disadvantaged students to ultimately

complete college whereas others drop out.

So I chose to come back to UM-Dearborn to study my computer science Ph.D degree simply because of the

relationships I developed with several of the faculty. As a undergraduate

student they mentored me and really introduced me to how I should be giving back to the community.

My name is Christian Ledford.

My name is Jeffrey Yackley.

My name is Mathew Fleming.

My name is Bayan Jaber and I am a 2018 UM-Dearborn Difference Maker.

For more infomation >> UM-Dearborn Difference Makers 2018: Faculty Connection - Duration: 1:32.

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UM-Dearborn Difference Makers 2018: Regional Impact - Duration: 2:26.

Two years ago the Informational Technology Management Association started a Detroit Public Schools coding camp initiative.

It takes about thirty to forty middle school students from Detroit Public Schools.

We provide lunch to them, even pay for the bus to get here and

its an experience where we can try teach them the importance of not only technology and their future jobs

but also, different coding strategies and different complications that come with it.

Part of our mission at Covenant House is UM-Dearborn sends out tutors to

help students there in the areas of math, reading and writing to obtain their G.E.D hopefully.

And better encourage them to stay off the streets and stay off the things that might put them in danger

and keep on pursing their education.

My capstone project was the Mercado Food Hub

which is food client choice pantry for low income families.

And I've been able to make a big difference there because they don't have the resources

to be able to analyze all the different areas they can optimize such as facility design, inventory and food quality.

For alternative spring break, we were able to go to Cleveland and volunteer for a whole week and you got to see

the impact you were doing through those people.

So for a whole week [we did] with different nonprofits so the Boys and Girls Club, food banks, book banks.

So all those things that you might not normally do here, you're able to see the impact making there

and also make those connections and see how you can bring them back here to Detroit.

So I'm involved in several organizations and leadership experiences on campus.

My first one is "Books for a Benefit."

I'm involved in that organization that promotes literacy in underprivileged communities.

Were also building a library in a Detroit elementary school.

Service is very important to me because you only learn and grow when you give to others.

When you have certain gifts and you're able to share them with others and really make an impact on your community

that's what helps you to personally grow and develop as a person.

My name is Rosa Gonzalez.

My name is Austin Decker.

My name is Mariam Aoun.

My name is Maridy Mazaira.

My name is Hussein El-Souri and I am a 2018 UM-Dearborn Difference Maker.

For more infomation >> UM-Dearborn Difference Makers 2018: Regional Impact - Duration: 2:26.

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UM-Dearborn Difference Makers 2018: Campus Life - Duration: 1:50.

For more infomation >> UM-Dearborn Difference Makers 2018: Campus Life - Duration: 1:50.

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Technicians at Febelco - Making a difference - Duration: 2:54.

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UM-Dearborn Difference Makers 2018: Inclusive Campus - Duration: 1:40.

We have the diversity and that's demographics but we're really inclusive

and what that is is not just having different people with different

backgrounds but interacting with them meaningfully, learning from each other, growing, appreciating.

Me from coming from 8,000 miles like away I'm here and

I'm a part of this campus equally. And I work on campus part-time and it is so

lovely to have that experience have so many friends and they're from different

places and I got all of that because I was involved on campus.

University of Michigan-Dearborn is a good place for non-traditional students.

Here the S.O.A.R program here is really unique in that it centers on non-traditional students.

I would think that this campus is really unique because there's a lot of

diversity among the whole student body and I wouldn't have had the

opportunities that I've had to meet new people and see new things and when

you're working with others and when you're not able to bring something to

the table. You're missing out and others are missing out on potential

that you can bring. And I think that if you're involved on campus you're able to

get a certain voice out in a certain perspective that otherwise wouldn't have been shown.

My name is Anuja Pandey.

My name is Thomas Wolsek.

My name is David Solomon.

My name is Timothy Carter II and I am a 2018 UM-Dearborn Difference Maker.