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Thread: Finding grams of copper

  1. #1 Finding grams of copper 
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    A compound of copper and sulfur contains 88.39 g metal and 44.61 g non-metal. How many grams of copper are in 5264 g of compound?


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  3. #2  
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    most members on this forum would prefer for you to post your own attempt at the question then if you are stuck we can help you out.

    otherwise we could just be doing your homework for you.

    but some pointers

    1) copper is metal, sulphur is not metal.

    2) work out the percentage mass of copper in your original compound

    3) take this percentage of the compound of greater mass


    everything is mathematical.
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    again yes, just reiterating OG's points: this forum isnt for free answers for homeworks. please show which step (if possible) u were stuck at and why or what difficulties u had completing it. and yes, OG's methods are definitely correct. though i would advice u to brush up on ur basic chem concepts of metals and non-metals.
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  5. #4 Re: Finding grams of copper 
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    Quote Originally Posted by 11min
    A compound of copper and sulfur contains 88.39 g metal and 44.61 g non-metal. How many grams of copper are in 5264 g of compound?








    Can't believe that everyone was so ignorant.
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    we're not being ignorant, but it is better for people's learning that they work it out themselves rather than someone with an inferiority complex giving them the answer
    everything is mathematical.
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    Quote Originally Posted by organic god
    we're not being ignorant, but it is better for people's learning that they work it out themselves rather than someone with an inferiority complex giving them the answer
    What do you think why they have come to here?
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    they could always go to their teachers for help (otherwise why would they come here?). i for one nvr bothered going to forums to ask about homework, only stuff that teachers refused to answer on the basis of context of education. i believe the forum is for exchanging of ideas, etc, not just for homework.

    again, in case u didnt notice, OG did help him with the question by prodding him in the right direction.
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    Quote Originally Posted by oceanwave
    they could always go to their teachers for help (otherwise why would they come here?). i for one nvr bothered going to forums to ask about homework, only stuff that teachers refused to answer on the basis of context of education. i believe the forum is for exchanging of ideas, etc, not just for homework.

    again, in case u didnt notice, OG did help him with the question by prodding him in the right direction.
    Generally, teachers aren't always available for their students. That is why many students choose to become a member of a forum. Any forum isn't just for homework, yes, but one of the reasons to build a forum is to help others who are in need for their homework, their job, their experiment, etc.

    You can always provide someone an answer while pointing him/her to the right direction as well.
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    you learn more by doing it yourself. no R.E.
    everything is mathematical.
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    Quote Originally Posted by organic god
    you learn more by doing it yourself. no R.E.
    Your student goes to a laboratory as a freshman and he/she doesn't have any idea of it at all. Should you let him/her do the things by himself/herself or should you help him/her with the things by providing examples?
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    not relevant to the discussion

    if someone comes here with homework they should know the theory on how to do it, therefore to really learn it they should do it themselves not get spoonfed the answers
    everything is mathematical.
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    Quote Originally Posted by organic god
    not relevant to the discussion

    if someone comes here with homework they should know the theory on how to do it, therefore to really learn it they should do it themselves not get spoonfed the answers
    Oh, if they do know the theory, why do they come to here?

    A : "I really need 50."
    B : "Here. I give you 20. You can get a job to get the rest."

    How pathetic. If you don't want to help, you better don't. It's not rocket science, is it?
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    ok let me rephrase what i actually meant.

    they SHOULD know the theory, basically means the teacher will have gone through it in class.
    If they come here asking, it is best to give them the foundations to the theory rather than just giving them the answer.

    I do want to help, but my help is in the form of aiding the learning process. rather than just trying to prove how smart i am.
    I don't need to do this, I am aware of how intelligent I am and don't need to parade it to random peeps on the forum.
    This makes me pathetic?
    everything is mathematical.
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    Quote Originally Posted by organic god
    ok let me rephrase what i actually meant.

    they SHOULD know the theory, basically means the teacher will have gone through it in class.
    If they come here asking, it is best to give them the foundations to the theory rather than just giving them the answer.

    I do want to help, but my help is in the form of aiding the learning process. rather than just trying to prove how smart i am.
    I don't need to do this, I am aware of how intelligent I am and don't need to parade it to random peeps on the forum.
    This makes me pathetic?
    So, providing answers always shows how smart someone is?

    Get over it, organic god. It's the people like you who make this world looks worse. You do actually know how to help, you do actually know what you can help, you do actually know the outcome of something. But because you wants to look smart and intelligent, you say that you wants only to provide the way, i.e. like I said, letting someone do the rest of the job, and that you show people how to behave properly in scientific education.

    If I provide a direct answer like I wrote above, do you think that the original poster re-write it without thinking?

    The attitude like yours truly makes this world pathetic.

    Oh, and if you say that they should know what their teachers told them, do you think they come up in here?
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  16. #15  
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    Give a man a fish he can feed himself for a day

    Teach a man how to fish he can feed himself for life.

    Obviously George we disagree on this subject, You are obviously intelligent and so i respect your comments but i disagree with your methods of education. it is my belief that a solid grasp of the fundamentals is more important than any single answer can be.
    Yes i could of given the student the answer but i think with how i approaced it, the student will be forced to think for themselves. I accept that the student may of thought about the answer before writing it down, but perhaps not.

    This may be making the world seem pathetic in your eyes but it is how i will continue to educate.
    everything is mathematical.
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    Quote Originally Posted by organic god
    Give a man a fish he can feed himself for a day

    Teach a man how to fish he can feed himself for life.
    Aye ... that is true. But in this case, I didn't give someone a fish for a day.

    By providing the answer of his question, I've showed him the way until the solution. But when he re-writes my solution, he'll think how I could do it. It's called "learning by example".

    Obviously George we disagree on this subject, You are obviously intelligent and so i respect your comments but i disagree with your methods of education. it is my belief that a solid grasp of the fundamentals is more important than any single answer can be.
    I'm not. If you see what I am and who I am, you'll be surprised how poor, how lazy and how stupid I am. I'm a Chemistry student who doesn't know anything about Chemistry. I was poor in this science branch in my high school. If I had had another choice here, I would have gone for it.

    Your method isn't wrong. You're like my Biology teachers in my high school. But my experience tells me that this isn't what students expect. I saw the grade sank faster than Fat Boy did. I tell you: this method only works for students who love the subject so that they want to know more and so that they want to explore more. Their mind works in "chemical" way in this case.

    Yes i could of given the student the answer but i think with how i approaced it, the student will be forced to think for themselves. I accept that the student may of thought about the answer before writing it down, but perhaps not.

    This may be making the world seem pathetic in your eyes but it is how i will continue to educate.
    Continuing the text above, my experience tells me that many students can reach the star if their teachers work the solution out. Based on the given example, the students always think about every step which they do. This method works based on my experience with my Mathematics teacher.
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    Maybe a mixture of the two methods is required.

    I agree that worked examples are required for a full grasp of the subject and this was useful in all my subjects, but i still think students should undergo given questions by themselves.


    this method only works for students who love the subject so that they want to know more and so that they want to explore more.
    This is why i believe one of the main roles of the teacher is to inspire a love for his subject, otherwise the less motivated student who may be gifted will be left behind.
    everything is mathematical.
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  19. #18  
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    Quote Originally Posted by organic god
    Maybe a mixture of the two methods is required.

    I agree that worked examples are required for a full grasp of the subject and this was useful in all my subjects, but i still think students should undergo given questions by themselves.
    Fully agreed, but the pathetic world doesn't seem listen to neither me nor you nor the other people. I've wanted to revolute the education system in my college, but the lecturers don't have any ears.

    this method only works for students who love the subject so that they want to know more and so that they want to explore more.
    This is why i believe one of the main roles of the teacher is to inspire a love for his subject, otherwise the less motivated student who may be gifted will be left behind.
    Yeah ... you should do it. And I agree. But have you thought that some of your students simply sit in the wrong place? My life speaks more: seeing 300 students in the beginning of the first year, 200 leave at the end of the year.
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    oh gosh, im gone for like 16 hours and the thread has gone waaay off topic. fine. i may agree about having some answers thrown in the face (other wise even i may not know how to apply a certain theory) but having some is very different from all answers being thrown upfront. OG was probably referring to this when he said to 'combine' the 2 methods. my chem was nvr good in what u would term as junior high as all my chem teacher did was just to force us to memorise each and every single damned formula/fact available which resulted in me not having any grasp of stoichiometry. fortunately, upon entering 'secondary school' which in my country is termed junior college, someone bothered to explain the basics to me and no, he didnt throw the answers at me at all. i found out on my own how to apply them. hence transforming from a guy who didnt really like chem to a very passionate theoretical chemist. but well, just as i could point out that what u experienced was just one person's opinion, so could u. hence, to each his/her own preferences. (but im sure u know which side of the fence im on)

    and no, u dont need to be a chemical genius to at least understand the basics. they are called basics for nothing.
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  21. #20  
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    One interesting perspective on learning is from the former chess IM Josh Waitzkin. (not sure if i spelt that right)
    I know when he studied or taught chess he would want him or his students to have a mastery of a few fundamental principles rather than learning specific moves, he was a great chess player and he taught many other great players. i think this is a reflection of his methods (aswell as natural talent).

    But have you thought that some of your students simply sit in the wrong place
    I'm not actually a teacher, i did some personal tutoring back home before i came to uni but i'm still just a student myself.
    everything is mathematical.
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  22. #21  
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    Quote Originally Posted by oceanwave
    oh gosh, im gone for like 16 hours and the thread has gone waaay off topic. fine. i may agree about having some answers thrown in the face (other wise even i may not know how to apply a certain theory) but having some is very different from all answers being thrown upfront. OG was probably referring to this when he said to 'combine' the 2 methods. my chem was nvr good in what u would term as junior high as all my chem teacher did was just to force us to memorise each and every single damned formula/fact available which resulted in me not having any grasp of stoichiometry. fortunately, upon entering 'secondary school' which in my country is termed junior college, someone bothered to explain the basics to me and no, he didnt throw the answers at me at all. i found out on my own how to apply them. hence transforming from a guy who didnt really like chem to a very passionate theoretical chemist. but well, just as i could point out that what u experienced was just one person's opinion, so could u. hence, to each his/her own preferences. (but im sure u know which side of the fence im on)

    and no, u dont need to be a chemical genius to at least understand the basics. they are called basics for nothing.
    That is different. If you've already sat in tertiary education, you can't go back. That is why I said that some people just sat in a wrong place.

    You can't, for example, ask a Physics student to analyze a Chemistry problem by forcing him/her to go step by step. Only by giving him/her the answer of the problem he/she can learn to develop himself/herself better.
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  23. #22  
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    haha one idea is that theoretical chemistry is just physics so they should be able to do it quite easily =)
    everything is mathematical.
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  24. #23  
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    Quote Originally Posted by organic god
    haha one idea is that theoretical chemistry is just physics so they should be able to do it quite easily =)
    Well, they can't do it further. I just want to say that you can't generalize anything.
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