***Chemistry - Fall 2005***

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Who else is taking Chemisrty this semester? I thought maybe we can check in with each other, and help each other out.

If there is enough of us maybe we can even get a sticky.

I am taking Health Science Chemistry 1.

Here are a couple of problems that is on the review sheet. I don't know the answer to it either since he won't give it to us.

Given the density of Au is 19.3^3, determine the mass of gold in an ingot with the dimensions of 10.0 in x 4.00 x 3.00 in

The multiple choices are

A) 3.80 x 10^4

B) 2.32 x 10^3

C) 0.161

D)102

E) none of the above

I know you have to change in^3 to cm^3 right? And the volume=10inx4inx3in so V=120in^3 but after that I am lost. I know 1inx1inx1in=in^3. He never went over this in class. All of the other students are getting so frustrating over this class. There are quite a few people who just went to give up.

All of the cm^3 problems are giving me trouble such as "How many cm^3 are there in 1.25 ft^3? Is it A) 246 B) 5.49 C) 3.54 x10^4 D)38.1 or E)none of the above

He still has not finished lecture 1. The test was suppose to be in the testing center on Friday but since he did not finish the test will be in there on Tuesday. He said he will finish the lecture on Monday. He has been saying that for the last 2 lectures now though. He keeps forgetting we only have 1 hour for lecture 3x a week. He is not very organized. Anyways any thoughts about the problems and any thoughts about how to make the ones that are ^3 easier? Our test is going to be over measurements, atoms, and elements.

Another area that is confusing me is Energy and Quantum Number. Why do we jump to 4s and skp 3d but than after 4s we go back to 3d? Does that make sense? This has to do with the periodic table and increasing energy. I am just so lost!!!

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Specializes in Operating Room.
given the density of au is 19.3^3, determine the mass of gold in an ingot with the dimensions of 10.0 in x 4.00 x 3.00 in

the multiple choices are

a) 3.80 x 10^4

b) 2.32 x 10^3

c) 0.161

d)102

e) none of the above

m=vd 10.0 x 4.00 x 3.00 = 120.

m=(120)(19.3x10 e3)

m=231600

m=2.316 x 10 e-6

m=2.32 x 10 e-6

"how many cm^3 are there in 1.25 ft^3? is it a) 246 b) 5.49 c) 3.54 x10^4 d)38.1 or e)none of the above

1 ft = 0.032808399cm

"if" you multiply 1.25 x 10 e3 by 0.032808399cm the answer would be none of the above. i'm not sure if that is how you work that problem, though.

as for quantum numbers, we haven't covered that. it's not until the chapter we will learn tomorrow.

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Actually, thermochemistry isn't that hard. There's just a few questions on the extra credit homework that I need help with. I'll go to the tutoring center Tuesday for those.

I really think that b/c this is an accelerated class, we are skipping a bunch....just learning the major things. I'm glad. I don't plan on needing 99.9 % of this in nursing, and the only reason I am taking this class is for my future RN-BSN.

The only thing I've learned so far that I think I'll use in nursing is the review on conversions. lol

Good luck to you! :)

I am working on my BSN on the university level. We only need to take Organic/Biochem for our degree. I know some other colleges make you take a Inorganic class in addition. Thankfully I just need this one. It is hard, let me throw a problem at you all and maybe you can tell me an easy way to decipher it. I need to write a bond angle for CH3 - CH2 - CH - C=O-CH2 - C triple bond C - CL '

CH3

It is kind of hard to type it in, but that is what it looks like on paper. Here is another problem, CH3 -CH3 +I2, I have to finish it. Ugh...this is the 3rd week into this class with a pre req of high school chem, I am having a hard time with it. The other students are taking this class for the 3rd time and they seem to know it easier, than I am catching on. I may need a tutor for this class.

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So for the first answer it would be none of the above too since you had gotten ^6 when none of the answers are to the ^6. There is a 2.32 x 10^3 but none of them are to the ^6. I actually got A for my answer. The problem is that you have to change in^3 to cm^3 and the volume is 10.0 in x 4.00in x 3.00 in which equals to 120 so V=120 and than you think 120x1inx1inx1in and 1 in=2.54 cm so you have the problem 120(2.54cm)(2.54cm)(2.54cm) and than after you work that one out you mulitply that by 19.3 and you get 37952.44022 and you put that in scientific notation which is 3.80x10^4 so the answer would be A. The 2 ladies I talked to said that is what they got for an answer too.

And for the second problem the answer is 3.54 x10^4. We worked that problem in class and he said that was the answer. I just didn't know how he got that. 1ft^3=2832cm^3 is what we used to help convert. 1.25 ftxftxft and than you know there is 12 in. in 1 ft. and there are 1 in. in 2.54 cm so you multiply like this: 1.25(12x2.54cm)(12x2.54cm)(12x2.54cm) and you get 35396.05824 and you put that in scientific notation so you get 3.54x10^4 so C would be the answer to that one.

Thanks for your help though!! Can't believe we are doing quantum numbers than since we are CHEM 1405 and you are CHEM 1411. UGH Everyone is confused on that.

As for quantum numbers, we haven't covered that. It's not until the chapter we will learn tomorrow.
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Specializes in Operating Room.

lalajenn: lol...You're probably right. I didn't pay attention to the "in". Sorry.

As for the "Quantum Numbers", I'm sure most books are about the same, some may be a little more indepth than the others, and some cover the same thing in different parts of the book. I guess quantum numbers must be pretty important in Chemistry...thank God I'm not a chem major!!! :chuckle

SkanauxRN2009: I'm not sure what a bond angle is. We haven't covered that yet either. I'm pretty sure that we have to write things like that for our test 5.

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I think this is probably why I try to teach myself with everything. lol If only we had a good teacher that actually helped us than I am sure I would really get it. Coming on here is getting confusing. Good thing we have study groups in the class. Seems like no teacher is alike and goes with their own flow. Our teacher says he does not teach out of the book, what he teaches is chemistry. What is the difference is what I am wondering??

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Specializes in Operating Room.

Exactly. It was much better with the A&P 1 thread for Spring. Most of us were using the same book, and going somewhat at the same pace.

I think this is probably why I try to teach myself with everything. lol If only we had a good teacher that actually helped us than I am sure I would really get it. Coming on here is getting confusing. Good thing we have study groups in the class. Seems like no teacher is alike and goes with their own flow. Our teacher says he does not teach out of the book, what he teaches is chemistry. What is the difference is what I am wondering??
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Who else is taking Chemisrty this semester? I thought maybe we can check in with each other, and help each other out.

If there is enough of us maybe we can even get a sticky.

I am taking Health Science Chemistry 1.

Hey! I will hopefully be taking Chem next semester.

I am going to get that out of the way so I can get into Anatomy and Phys 1 and 2, then intro to psych, and human growth and development! YAY..

I am going to try to take it one or two classes at a time. I am not really in a hurry.. because I am so NOT good with these classes that I think if I take too many at once I will BOMB!!!!!

I have never taken chem.. not even in high school... so.. um

What is it like??~!!!!!

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Specializes in Operating Room.

Chemistry is confusing to me, but someone else may understand it completely. So, it's hard to say what it's like. lol

It's definitely full of math, which is not my favorite. Just use your school's tutoring center, if needed, and you should be fine.

Good luck! :)

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Specializes in Operating Room.

We had our 3rd exam today....2 more to go.

In lab we did a project where we had to figure out the Lewis Structure, # of valence electrons, Molecular geometry & draw a 3D structure for 10 different compounds. (well a 1D - 3D structure.) lol

Pretty fun. :rolleyes: Hope everyone is doing well.

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Specializes in LTC.

Chemistry really isn't that bad. I feared chemistry when I startted taking it in college. I had tried taking chem in high school, but due to lack of showing up for class I failed miserably. I took my first chem class last spring and now have moved onto my second and amazingly it's coming pretty easy to me.

I would definately suggest that you be comfortable with basic algebra, you'll be using it A LOT in chemistry. I would also suggest that if you are worried about it take it in a semester with a couple of lighter classes. I'm concurrently taking chem and A&P1 and it's a killer.

Hey! I will hopefully be taking Chem next semester.

I am going to get that out of the way so I can get into Anatomy and Phys 1 and 2, then intro to psych, and human growth and development! YAY..

I am going to try to take it one or two classes at a time. I am not really in a hurry.. because I am so NOT good with these classes that I think if I take too many at once I will BOMB!!!!!

I have never taken chem.. not even in high school... so.. um

What is it like??~!!!!!

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lalajenn: lol...You're probably right. I didn't pay attention to the "in". Sorry.

As for the "Quantum Numbers", I'm sure most books are about the same, some may be a little more indepth than the others, and some cover the same thing in different parts of the book. I guess quantum numbers must be pretty important in Chemistry...thank God I'm not a chem major!!! :chuckle

SkanauxRN2009: I'm not sure what a bond angle is. We haven't covered that yet either. I'm pretty sure that we have to write things like that for our test 5.

Well it is getting a littel easier to figure out now. We break things down by their group and then give them the full name of the compound. So these have been Isomers. I am glad I do not have to learn quantum numbers. That looks very spooky to me, lol. Even more confusing than what I am learning now.

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