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  1. Question: Elements

    by neodarwinian
    Answers
    2
    Views
    393

    What does alkaline mean?

    What does alkaline mean?
  2. Answers
    6
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    519

    What is the hardest natural substance know to man?

    What is the hardest natural substance know to man?
  3. You only have 20 amino acids to chose from and...

    You only have 20 amino acids to chose from and thousands of proteins to make.
  4. Answers
    2
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    1,130

    Don't you think the Golgi is too far down the...

    Don't you think the Golgi is too far down the endomembrane system for making proteins?

    Even biology can be logically approached.
  5. Answers
    2
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    1,108

    Are they changed in a reaction?

    Are they changed in a reaction?
  6. Question: Calculus

    by neodarwinian
    Answers
    2
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    1,318

    Try differentiation here.

    Try differentiation here.
  7. A quick Google of the alkaline earth metals will...

    A quick Google of the alkaline earth metals will give you your answer.
  8. Answers
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    547

    O^2- That is a free radical. A anion. H2O ...

    O^2-

    That is a free radical. A anion.

    H2O

    One result of these electron hogs interacting with other elements. Not always this innocuous.
  9. Answers
    3
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    791

    This is year two algebra?! This simple...

    This is year two algebra?!

    This simple arithmetic problem can be solved with the converse of the percentages given. Simple division.
  10. Question: Distance

    by neodarwinian
    Answers
    3
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    795

    Distance = Rate * Time Or, for our purposes, ...

    Distance = Rate * Time

    Or, for our purposes,

    Rate = Distance/Time

    From the rate, m/s, you should be able to figure out the ' beats by. '
  11. Regardless, the warning stands.

    Regardless, the warning stands.
  12. Phosphine gas is highly toxic and flammable....

    Phosphine gas is highly toxic and flammable. Untreated phosphine gas is also orderless.

    Do not synthesize this gas!
  13. CuO + H2 ---> Cu + H2O Simple stoichiometry...

    CuO + H2 ---> Cu + H2O

    Simple stoichiometry here as all is one to one. Find moles of reactants, the H2 should be limiting ( but check----found moles less than coefficient moles, but H2 really...
  14. Answers
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    638

    Because they are both disassociated in solution....

    Because they are both disassociated in solution.

    K^+ ( the cation on both sides of the equation )

    and

    NO3^- ( the polyatomic anion on both sides of the equation )

    In solution these ions...
  15. Checked with Genentec?

    Checked with Genentec?
  16. Question: Chi square

    by neodarwinian
    Answers
    1
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    484

    The usual 5% significance level. More detail...

    The usual 5% significance level.


    More detail from you needed here
  17. Answers
    2
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    520

    (6c -5) + (-6c) Now, spaced properly I see...

    (6c -5) + (-6c)

    Now, spaced properly I see that you just add the two terms together. Only one term will remain then.

    No multiplication here and this is a simple set of terms just needing to be...
  18. Answers
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    515

    Simple division here.

    Simple division here.
  19. Answers
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    488

    Not a real equation but an identity. Use your...

    Not a real equation but an identity.

    Use your identities on the inside of the text cover and follow the other answer that was given.
  20. Answers
    3
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    532

    Molarity = moles of substance/Liters of solution...

    Molarity = moles of substance/Liters of solution ( convert mL to L )

    If you have moles you can get mass.
  21. Answers
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    631

    Could use a chi square hypothesis test. X^2 =...

    Could use a chi square hypothesis test.

    X^2 = sigma(total of) {observed frequency - expected frequency)^2/expected frequency]


    Less that 5% and through out the hypothesis.
  22. Answers
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    1,388

    Obviously she is pregnant, so fertility dates...

    Obviously she is pregnant, so fertility dates were miscalculated most likely.

    The " rhythm " method is very inaccurate. Pulling out is not much better. Try a better means of birth control
  23. Solving Algebraic Equations 6x-7y=-13 and...

    Solving Algebraic Equations 6x-7y=-13 and 7x+5y=-2

    A system of equations.

    6X - 7Y = - 13
    7X + 5Y = - 2

    Elimination would work best here. So you would bring the set to opposite but equal...
  24. PV = nRT Pressure * Volume = moles of...

    PV = nRT

    Pressure * Volume = moles of substance * R ( a constant ) * temperature in Kelvin

    This is a fairly simple ideal gas equation problem.
  25. Answers
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    1,647

    Lysosomes are full of these enzymes and they...

    Lysosomes are full of these enzymes and they merge with their target.
  26. Answers
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    545

    Organosilicon compounds are usually absent in...

    Organosilicon compounds are usually absent in biochemical processes. The non carbon analogue, I think.

    I do not understand from your question if organosilcons are analogous, or not analogous in...
  27. Simple equality. M1V1 = M2V2

    Simple equality.

    M1V1 = M2V2
  28. Answers
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    458

    f(x)=x^2 if x

    f(x)=x^2 if x<0

    f(- 2)

    Just plug and chug. - 2 is < 0, so..

    f(x) = X^2

    f(- 2) = (- 2)^2
  29. Answers
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    733

    The biomass. All organic matter. Living and...

    The biomass. All organic matter. Living and nonliving.

    A simple carbon cycle.

    Plants take carbon dioxide from the air, fix it into sugars and use it to build plant matter. ( some carbon dioxide...
  30. Actually, they are inverted to keep the covers...

    Actually, they are inverted to keep the covers from fogging and facilitating the growth of fungi. Also to keep that moister from dripping back into the culture.
  31. Answers
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    1,616

    That appears to be it. There are no further...

    That appears to be it.

    There are no further common factors that I can see.

    2(4X^2 - 25)
    ============This appears to be the fully factored expression. ( especially at the HS level )
  32. Answers
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    453

    Not sure what you want but helium is an inert gas...

    Not sure what you want but helium is an inert gas and carbon dioxide is anything but inert.
  33. Answers
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    697

    You should know this is a tetrahedral structure...

    You should know this is a tetrahedral structure and the VESPER theory is well explained in your chem book

    5.
    VSEPR theory explains ______.

    This should be obvious as we live in a three...
  34. Question: Blood Group

    by neodarwinian
    Answers
    2
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    895

    Not possible. Blood group O is recessive ( Rh...

    Not possible.

    Blood group O is recessive ( Rh factors, +/-, mean nothing here )

    If both parents are O this thin is the only cross as a recessive expression must be homozygous.

    OO X OO...
  35. Answers
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    1. What are the molecular shapes of? Methane...

    1. What are the molecular shapes of?
    Methane (CH4)

    This is a tetrahedral structure and this structure is in your book along with all the other VESPER theory structures. ...
  36. Question: Math

    by neodarwinian
    Answers
    3
    Views
    753

    Review the distributive property.

    Review the distributive property.
  37. The seasons. Google for fuller answer.

    The seasons.

    Google for fuller answer.
  38. Question: Gas laws

    by neodarwinian
    Answers
    1
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    470

    P1*V1/T1 = P2*V2/T2 You have 5 things and you...

    P1*V1/T1 = P2*V2/T2

    You have 5 things and you need to find the 6th.

    Might have to do some conversions.

    Pressure = atmospheres

    Volume = liters
  39. Question: PV=nRT

    by neodarwinian
    Answers
    1
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    458

    1 mole gas/4 stops = 0.25 moles Convert...

    1 mole gas/4 stops = 0.25 moles

    Convert Fahrenheit to Kelvin by going through the Fahrenheit to Celsius conversions and use the 62.36 L*torr/mol*K ( torr = mm Hg directly)

    Then, PV...
  40. 6.022 X 10^23 ------------------------A helpful...

    6.022 X 10^23
    ------------------------A helpful number in your situation.

    No homework is done here without some work being shown so that help can be given. Show a set up.
  41. Answers
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    1,328

    They sell kits that tell you very easily whether...

    They sell kits that tell you very easily whether you are pregnant or not.

    From this perspective, behind my keyboard, I could not tell you but it sounds as if your menses is acting particularly...
  42. Question: Chemistry

    by neodarwinian
    Answers
    2
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    641

    Substances tend to flow down their concentration...

    Substances tend to flow down their concentration gradients.
  43. With a true and false question you know they ALL...

    With a true and false question you know they ALL can't be in the nucleus
  44. Question: Chemistry

    by neodarwinian
    Answers
    2
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    929

    This is very simple. What is your density...

    This is very simple.

    What is your density formula? Plug and chug.
  45. Answers
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    483

    2NaF + H2O --> 2HF + Na2O...

    2NaF + H2O --> 2HF + Na2O
    --------------------------------------------

    This would be the ideal balanced equation that would yield hydrofluoric acid, but I said ideal, so I think you are right and...
  46. Looks cut off to me, but.. This formula seems...

    Looks cut off to me, but..

    This formula seems right.

    q(in joules) = mass * specific heat of that mystery gas * change in temperature
  47. Question: Need help

    by neodarwinian
    Answers
    2
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    2,585

    X = Vo*t + 1/2a*t^2 A equation of kinematics...

    X = Vo*t + 1/2a*t^2

    A equation of kinematics you may find useful.
  48. Hydrogen is.. 1.008 grams/mole That is...

    Hydrogen is..

    1.008 grams/mole

    That is 1.008 grams is 6.022 X 10^23 atoms of hydrogen.

    So, 1 atom of hydrogen..

    1 atom H/6.022 X 10^23 atoms
  49. Question: Biology

    by neodarwinian
    Answers
    1
    Views
    666

    Both in the strong nuclear force holding protons...

    Both in the strong nuclear force holding protons and neutrons together and the weak nuclear force that is there in electron interactions between elements.
  50. Answers
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    635

    Nitrogen fertilizer is used in bombs, not...

    Nitrogen fertilizer is used in bombs, not phosphorous fertilizer.

    You people are right about one thing, chemistry is not your profession. Chemistry is not a trade!

    This is homework and not...
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