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    Valance electrons please help!

    Yes, sulfur has 6 and chlorine has 7. You're going to need to understand why, or else your knowledge of chemistry will not develop much further. Look at the columns of the periodic table, for starters.
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    Find theoretical yield from a balanced equation

    You've been given the theoretical yield of N2, and you know the actual yield from the experiment. Percent yield = (Actual yield / Theoretical yield) x 100% You can calculate this using moles.
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    Titanium 2+ Ion electronic structure?

    That's right. 4s is of lower energy than 3d.
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    Colloids solid or liquid?

    Wow. Old thread.
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    Difference between glocose and glycogen

    Glucose is commonly stored as glycogen in the body. More research on your part is required; this is a very generic and easily researchable question.
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    A question about oxidation

    Oxidation is simply an increase in oxidation number. More practically, it is the loss of one or more electrons in a reaction. When the body converts complex molecules into simple ones (such as the oxidation of glucose), it often oxidizes those molecules. More on oxidation...
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    Chem question Please help

    Remember that a reducing agent reduces, and an oxidizing agent oxidizes. An agent that reduces can not in itself be reduced. Draw out each half-reaction (including electron transfer) to determine which substance is oxidized, and vice versa. I'd suggest taking a look here...
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    Please exlplain this to me

    It appears to be written Mo6S9-xIx. In that case, the wire would contain x atoms of I and 9-x atoms of S. For example, 6 I atoms would yield Mo6S3I6. It probably has to do with molecular packing.
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    Chem question Please help

    Notice how in the first example, you've named the substance that was oxidized to be the oxidizing agent. In the second example, you named the substance that was reduced to be the oxidizing agent. Not only that, but you said chromium oxide was both reduced and oxidized.
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    Energy levels and quantum numbers If any of it is over your head, state what and how and we can explain it further.
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    Bronsted acids and bases

    The word you're looking for is amphoteric, which is a substance that can act as an acid or a base. Clearly, a substance with no H to donate cannot act as a Bronsted-Lowry acid, just as a substance that does not want/need an H will not act as a Bronsted-Lowry base. Amphoteric substances often...
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    Politics presentation on immigration

    It's homework help on an "other science" (social science). I'd say it's okay. :)
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    Please help me with my chemistry homework

    Sorry I didn't reply to this sooner. For some reason, this thread did not show up to me as recently added to, so I only saw your post after calcnd replied. You're generally correct about ionic bonds, although I did not understand your last sentence. If by farther up and right (i.e. more...
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    Bronsted acids and bases

    Do you need help classifying them, or do you just want answers? You won't get the latter. Show some work. (1) text [ sub ] down [ /sub ] and [ sup ] up [ /sup ]. E.g. v02 (2) [ tex ] text_{down}^{up} [ /tex ] E.g. v_{0}^{2} You can click on the latter to see how someone created it.
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    Stearic acid problem

    Both look fine.
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    What is this chemical formula of?

    Here's a structure I found of acemetacin. The only difference is the direction from which the carboxylic acid chain is coming off the ring. The image you posted above looks like a geometric isomer. (Note: If you remove...
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    What is this chemical formula of?

    There aren't 3 carbons, there are 21. Thank you for showing some attempt to figure it out. That molecule is Acemetacin, C21H18ClNO6.
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    Please help me with my chemistry homework

    In a very crude sense, bonds come down to electronegativity, and the reason for bonds is to achieve a noble gas configuration. Fluorine only needs one more electron to achieve a noble gas configuration, so it will eagerly react with another molecule to achieve that. If it reacts with an atom...
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    What is this chemical formula of?

    What's giving you trouble? Counting the hydrogens? I presume you can count all the nitrogens and oxygens without trouble. The rest of the "corners" are carbons. Some work on your behalf is necessary before we help you.
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    What is this chemical formula of?

    Link doesn't work for me. Edit: Link corrected to proper format.
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    Newtons 3rd Law

    F = ma (You should try to memorize this one if you could.) x_{f} = x_{i} + v_{x,i} \Delta t + \frac{1}{2} a_{x} (\Delta t)^{2} v_{f} = v_{i} + a \Delta t v_{f}^{2} = v_{i}^{2} + 2a \Delta x Where x is simply a component value. Pick the one that suits your needs. If you are curious what any...
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    Newtons 3rd Law

    Draw your free body diagram and determine the net force acting on the boat. You know vi = 0. Now, determine the net acceleration on the boat (you know the mass), and plug it into a kinematic equation to find out how far it went. Alternatively, you can calculate each component separately, and...
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    Impossible problem? [Varibles ONLY]

    Thank you for including the diagram, but some effort on your behalf is required before anyone here will help. No one is going to do the question for you.
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    Please help me with my chemistry homework

    I just noticed you double posted this. All future posts should be made in the Homework forum.
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    Please help me with my chemistry homework

    We don't do the questions, we help with them. Some effort on your part is required. To get you started, look into electronegativity. What does it measure? What can be determined by differences of electronegativity?
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    Hydrate and NaOH reaction

    What are the cations? What are the anions? Break the equation up into them, and you should see your answer.
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    Coordinate Covalent Bonds

    XeF_{4} has square planar geometry (each bond to fluorine is in plane, with a lone pair perpendicular to the plane above and below). Each bond is d^{2}sp^{3} hybridized, meaning there are six bonding orbitals in total. Therefore, each fluorine does in fact donate an electron (as does xenon) to...
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    Chemical equations of Propane

    C_{3}H_{8} + 5 O_{2} \rightarrow 3 CO_{2} + 4 H_{2}O + \text{energy} This formula is balanced by ensuring all atoms and charges are present in equal amounts on both sides of the equation. Going atom-by-atom (letter-by-letter), you can see that everything matches up. There are 3 carbons in...
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    Basic chemistry questions

    Typically, it comes down to context. Technically, H^{+} becomes H_{3}O^{+} in water. No, Avagadro's number is the number of molecules/atoms/things in one mole of that molecule/atom/thing. The mass of one mole is the molar mass (try to convince yourself why). To start, write out the formula...
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    Water bottle explosion with acid smell

    Perhaps it involved a household cleaner with a fragrant additive, such as orange or lemon Pine-Sol.