Chem Spring 2008

Nursing Students Pre-Nursing

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Hi all,

Hoping to start a Chem study group for Spring 2008. I do not begin class until January 15th but figured I would see about getting a group together as soon as possible.

Hi, Anne 36 here is the link for the fall thread. Come on in and study away.

https://allnurses.com/forums/f198/chemistry-fall-2008-a-318782-13.html

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Hello everyone,

I will be taking chemistry 1 and 2 summer of 2009. Originally, I was planning to take the course this fall but due to my trip outside the country i couldn't make it. So, I was wondering how hard is the the course? I want to know this ahead of time so i can make changes or not take it on the summer time. I will be taking chem 1 on summer 1 and chem 2 on summer 2. I know that summer classes are so intense because of the time. Do you guys think it's feasible to take this chem. 1 & 2 on the summer?

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Specializes in Critical Care.
Hello everyone,

I will be taking chemistry 1 and 2 summer of 2009. Originally, I was planning to take the course this fall but due to my trip outside the country i couldn't make it. So, I was wondering how hard is the the course? I want to know this ahead of time so i can make changes or not take it on the summer time. I will be taking chem 1 on summer 1 and chem 2 on summer 2. I know that summer classes are so intense because of the time. Do you guys think it's feasible to take this chem. 1 & 2 on the summer?

Honestly, if you are new at Chem. you should NOT take it in the summer! Its a pretty tough course, so I'd take it during a regular quarter (especially if you want/need an A). Good luck! :)

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need help with limiting reagents. the book i have sucks and i cant seem to find any online websites that explain it pretty well. but i did try. can someone who understands it please let me know if this is right? :banghead:

q: if 20 grams of hydrogen reacts with 48 g of nitrogen to produce 15 grams of ammonia (nh3). (note: write a balanced equation before you proceed) 3h2 + n2 à 2nh3

what is the limiting reagent? nitrogen (see the workout below)

moles of h2- 3.307

moles of n2 - 1.71

what is the theoretical yield of the product in moles and grams?

1.713 mol n2 x 28.020 g n2/1 mol n2 = 47.998 gn2

what is the percent yield?

30g/47.998 g =.625 x 100% = 62.50%

any help is greatly greatly appreciated!!!:cry:

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need help with limiting reagents. the book i have sucks and i cant seem to find any online websites that explain it pretty well. but i did try. can someone who understands it please let me know if this is right? :banghead:

q: if 20 grams of hydrogen reacts with 48 g of nitrogen to produce 15 grams of ammonia (nh3). (note: write a balanced equation before you proceed) 3h2 + n2 à 2nh3

what is the limiting reagent? nitrogen (see the workout below)

moles of h2- 3.307

moles of n2 – 1.71

what is the theoretical yield of the product in moles and grams?

1.713 mol n2 x 28.020 g n2/1 mol n2 = 47.998 gn2

what is the percent yield?

30g/47.998 g =.625 x 100% = 62.50%

any help is greatly greatly appreciated!!!:cry:

ok, i confess i didn't do the math. but what you need to do is to start with 15 grams of amonia and then do the stoichiometry to figure out how much of h you start with, then do the whole thing again to find out how much n you start with. whichever of these numbers is smaller is your limiting reagent.

my chem teacher explained in terms of painting a room. when you paint a room...you stop when one of two things happen...you run out of paint or you run out of wall. whichever you run out of first is the limiting reagent. so even if you finish the walls, and have two gallons of paint left...you won't keep painting right? so, if you start the stoichiometry with the product, do it separately with each reagent and make sure to use the coefficients from the balanced equation...the smallest answer is the limiting reagent. did that help at all?

peace,

curiousme

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Umm, no offense, but it's not a good idea to start with the 15 grams of ammonia. :)

Brismama, I posted an answer to your question in the other chemistry forum. I also posted a link with some helpful explanation of limiting reagent calculations. Best of luck!

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Hi All,

I would love to join your group to help you through. My students just completed their second general chemistry exam and most did well. We will be tackling chemical equations, redox reactions and molar mass calculations this week.

And for those of you planning to start chemistry in the spring, just remember, if you approach the subject positively, you will get far more out of it!

Gregory Simpson

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Hi All,

I would love to join your group to help you through. My students just completed their second general chemistry exam and most did well. We will be tackling chemical equations, redox reactions and molar mass calculations this week.

And for those of you planning to start chemistry in the spring, just remember, if you approach the subject positively, you will get far more out of it!

Gregory Simpson

That would be wonderful! Thank you so much!!!

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I start Intro Chem on Jan 14 so count me in.

:uhoh3: I am taking it and Micro all on the computer as distance courses through my community college and using a home lab kit. This could either be a really good or really bad idea. I am hoping for the best though.

I was considering the same. I have a 3 and 6 yr old and was wondering how your online course is going? Was it a good idea and do you have someone to ask questions to? Are you able to do it at your own pace or no?

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you're very welcome. i'm really glad that you think it will be helpful. i use mine all the time to help me through the chapters and prepare for exams. i wish you the best!! :wink2:

so, at class tonight we began going over stoichiometry...i may have spelt that wrong and also word problems. the suggestion that my instructor gave above really helped me to look through the problems and be able to solve them quite easily.

here are some examples.....

mol to mol (typically this is a 1 step problem)

how many moles of sodium will react with water to produce 4.0 mol of hydrogen in the following reactions?

2na + 2h2 ---------> 2naoh + h2

1st - what's the given? 4.0 mol of hydrogen

2nd - what are they asking for? moles of sodium (na)

start off with your given:

4.0 mol h2 x 2 mol of na = 8.0 mol of na

.................... 2 mol of h2

when you look at the fraction of 2 mol of na and 2 mol of h2 - this is the mole ration. using the coefficients from the equations allows me to see what the mole ratio is for the problem...thus giving us 8.0 mol of na.

2. mol to mass (typically a 2 step problem)

phosphorus burns in air to produce a phosphorus oxide in the following reactioin.

4p + 5 o2 ---------> p4o10 (p small 4, o small 10)

what mass of phosphorus will be needed to produce 3.25 mol of p4o10?

given: 3.25 mol p4o10

looking for? mass (in grams) of phosphorus.

3.25 mol p4o10 x 4 mol p x 31 g p = 403 g p

.......................... 1 mol p4o10.......1mol p

hopefully the above helps a little for anyone. there are two other types of equations as well.... mass to mol and mass to mass. let me know if you need other help let me know. :wink2:

i'm considering going to school for nursing. i'm 37 and a mother of 2 and want to do something for me. it's been yrs since i was n school and i don't have any clue about the prereq. i don't want this to hender me, but i wonder if there is a way i can study up on the subjects i need before i join school or should i just bite the bullet? the math equasion you just gave looks foreign to me and i couldn't make any since of it. now i'm wondering if i should even go to school. what are some ways you retained your information?

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hello this is the answer to my prayers!!!!!!!!!!!! i am taking general chem two for spring ....NOT LOOKIG FOWARD TO IT..... i took the first one 3 years ago and got a C+ ...it was the worst semester ever. I am looking gorward to this group thanks.

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Hi everyone starting chem 1032 in jan,i took chem about 15 years ago so i need help>>>>>>>>>

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