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    The volume of a micelle has been measured as 100,000 Å3. What is this volume in cm3?
    Express your answer as an index (such as: 1099)

    100,000 Å3 = 10Answercm3


    is it 10^-24 cm3?
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    (Original post by Lufthansa)
    The volume of a micelle has been measured as 100,000 Å3. What is this volume in cm3?
    Express your answer as an index (such as: 1099)

    100,000 Å3 = 10Answercm3


    is it 10^-24 cm3?
    What is A
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    (Original post by TenOfThem)
    What is A
    Angstrom
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    (Original post by Lufthansa)
    Angstrom
    That does not help - you have given us no information that enables us to convert between A and cm
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    (Original post by TenOfThem)
    That does not help - you have given us no information that enables us to convert between A and cm
    1 A = 10^-8 cm
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    (Original post by Lufthansa)
    1 A = 10^-8 cm
    So 1 A^3 = 10^{-24} cm^3

    And you need 100000 A^3
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    (Original post by TenOfThem)
    So 1 A^3 = 10^{-24} cm^3And you need 100000 A^3
    so will it be 10^-19 ?
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    (Original post by Lufthansa)
    so will it be 10^-19 ?
    Based on what you have told me, yes
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    (Original post by TenOfThem)
    Based on what you have told me, yes
    Express your answer in index form, rounding the first box to 1 d.p. (See instructions)

    1.4 L = Answer x 10Answer cm3


    this one would it be

    1.4 x10^3 ?
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    (Original post by Lufthansa)
    Express your answer in index form, rounding the first box to 1 d.p. (See instructions)

    1.4 L = Answer x 10Answer cm3


    this one would it be

    1.4 x10^3 ?

    Is L litres
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    (Original post by TenOfThem)
    Is L litres
    yes
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    (Original post by Lufthansa)
    yes
    then, yes
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    (Original post by TenOfThem)
    then, yes
    1 nm3 = 10Answermm3


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    (Original post by Lufthansa)
    1 nm3 = 10Answermm3


    You need to tsp asking

    you know how to do these
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    (Original post by TenOfThem)
    You need to tsp asking

    you know how to do these
    is it 10^-18 ?
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    (Original post by Lufthansa)
    is it 10^-18 ?
    yes
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    (Original post by TenOfThem)
    yes
    A pharmacist prepares a solution of NaCl of 1 M. They then dilute it four times: first 10-fold, and then 10-fold again, and so on.
    Express the concentrations of the four salt solutions in index form in units of mol.dm-3
    (Put the answer as 10x in each box)
    10Answer; 10Answer; 10Answer; 10Answer

    do you know this one?im stuck
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    (Original post by Lufthansa)
    A pharmacist prepares a solution of NaCl of 1 M. They then dilute it four times: first 10-fold, and then 10-fold again, and so on.
    Express the concentrations of the four salt solutions in index form in units of mol.dm-3
    (Put the answer as 10x in each box)
    10Answer; 10Answer; 10Answer; 10Answer

    do you know this one?im stuck
    I find Moles confusing - Actually I find Chem confusing generally
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    (Original post by Lufthansa)
    A pharmacist prepares a solution of NaCl of 1 M. They then dilute it four times: first 10-fold, and then 10-fold again, and so on.
    Express the concentrations of the four salt solutions in index form in units of mol.dm-3
    (Put the answer as 10x in each box)
    10Answer; 10Answer; 10Answer; 10Answer

    do you know this one?im stuck
    The NaCl is initially 1 M (1 moldm^-3 -- concentration)

    If you dilute something 10 fold, you're making the volume 10x bigger, hence making the concentration 10 times smaller. So one 10-fold dilution leads to:

    \frac{1}{10} moldm^{-3} = 1\times10^{-1} moldm^{-3}

    If you were to 10 fold it again, you'd get a tenth of that:

    \frac{1}{100} moldm^{-3} = 1\times10^{-2} moldm^{-3}

    So on and so forth
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    Community Assistant
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    (Original post by TenOfThem)
    I find Moles confusing - Actually I find Chem confusing generally
    It's just applied maths. If you tried, I'm sure you'd fine it easy.
 
 
 
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