sábado, 30 de octubre de 2010

Masa atómica y masa molecular, relativas y absolutas.,

La masa atómica (ma) es la masa de un átomo cuando se compara con un átomo de referencia, C12.

La masa atómica puede ser considerada como la masa total de protones y neutrones en un solo átomo. La masa atómica es algunas veces usada incorrectamente como un sinónimo de masa atómica relativa.

La masa atómica relativa es un sinónimo para peso atómico. Un peso atómico o masa atómica relativa de un elemento de una fuente especificada es la razón de la masa media por átomo del elemento a 1/12 de la masa de un átomo 12C. La media ponderada de las masas atómicas de todos los átomos de un elemento químico encontrados en una muestra particular, ponderados por abundancia isotópica.

Las unidades de masa atómica (u) se define como 1/12 de la masa del isótopo C12.

La masa molecular relativa es un número que indica cuántas veces mayor es la masa de una molécula de una sustancia con respecto a la unidad de masa atómica. Su unidad es el Dalton o unidad de masa atómica, que se abrevia u (antes uma).
La masa molecular se determina sumando las masas atómicas relativas de los elementos cuyos átomos constituyen una molécula de dicha sustancia. A pesar de que se sigue diciendo popularmente peso molecular, el término correcto es masa molecular. La masa molar de una sustancia coincide numéricamente con la masa molecular, aunque son cosas distintas.

Por ejemplo: la masa molecular del H2O será:

1,00794 x 2 + 15,9994 = 18,015128 u

(masa atómica del H: 1,00797, masa atómica del O: 15,9994)

La masa molar (símbolo M) de un átomo o una molécula es la masa de un mol de dicha partícula expresada en gramos. Es una propiedad física característica de cada sustancia pura. Sus unidades en química son los gramos por mol (g/mol).

Podríamos decir que la masa molar es lo mismo que la masa molecular pero en vez de estar en unidad de masa atómica (u) está en gramos/mol.

Seguimos con el ejemplo del H2O: La masa molar del agua es:

masa molar de H = 1 g x 2 átomos = 2
masa molar de 0 = 16 g 1 átomo = 16

Total = 18 g /mol.

El mol (símbolo: mol) es la cantidad de sustancia que contiene tantos átomos, moléculas, etc... como las que hay en 12 g de C12.

La cantidad correspondiente a 1 mol es 6,022 x 10 elevado 23 (nº o constante de Avogadro).

18 comentarios:

  1. Este comentario ha sido eliminado por el autor.

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  2. ¿Y las definiciones de masas absolutas?

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    Respuestas
    1. Se las metieron en el orto :v

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    2. Porque no te callas, y te vas a hacer algo más productivo que romper los huevos aca, la recalcada concha de tu hermana

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    3. Por que no te callas tu de una puta vez y te vas a tomar por culo?

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  3. Habla todo el articulo de masa atomica relativa solamente y de otra boludes que no me importa :v , me sirve para safar en clase. Gracias

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  4. No estuvo tan explicado pero ke salvo de la tarea GRASIAS!!

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  5. no maches cabron >:v me pase busacando las masas absolutas aunque me sirvio lo otro.... gracias
    POSDATA: la profe me saco un 100

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  6. hola cuales son las diferencias entre masa atómica absoluta y masa atómica relativa???

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  7. Swollen with liquid
    Ready to burst
    A load of my lymph
    Will quench this dead body's thirst
    One month in the grave
    twisted and half decayed
    She turned a putrid yellow
    I pissed in her maggot filled asshole

    Fucking the rotting
    My semen is bleeding
    The smell of decay
    Seeps from her genital cavity

    The smell was unbearable
    As I unburied her
    I cum blood from my erection
    I feel it run
    down her throat, swallow
    Eyes glassy and vacant
    body dug up to play with
    Skin greasy and naked
    tounguing her rotted anus

    I need a live woman
    to fill with my fluid
    A delicate girl, to mutilate, fuck and kill
    her body exceptional
    she thought I was normal
    but I wanted more

    I came blood inside of her
    chocking on the clot
    gagging on the snot
    gushing blood, from her mouth
    bloody gel leaking out
    Body buried in a shallow grave
    Unmarked for none to find
    The sickness I have left behind
    Undetected go my crimes
    The greatest thrill of my life
    To slit my own cock with a knife

    Violent, climax
    Serging serum
    on my skin

    Back from the dead
    I am resurrected
    to spew, putrefaction

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    Respuestas

    1. I was once a man before I transformed
      into this molester, freshly deceased children
      You have born, torn by my rape
      The dead are not safe, the lifeless child corpse
      I will violate

      Pleasure from the dead, complete satisfaction
      I open the coffin
      Sick thoughts run through my head as I stare
      At the dead, over and over, I can't escape
      I begin the dead sex, licking her young, rotted orifice
      I cum in her cold cunt, shivering with ecstasy
      for nine days straight I do the same
      She becomes by dead, decayed child sex slave
      her neck I hack, cutting through the back
      I use her mouth to eject

      Here I cum, blood gushes from
      bleeding black blood
      her head disconnected
      As I came, viciously I cut, through her jugular vein
      She's already dead, I masturbate with her severed head
      My lubrication, her decomposition
      Spending my life molesting dead children

      Intercourse with infants
      Curing heads on top of spikes
      boiling skulls
      Skin sliding off of bones

      Voices
      The voices call
      Voices
      The voices are calling me
      Buried dead I've spiritually infected
      Call to me from beyond their graves

      Bleed
      I now bleed pus
      I bleed, the blood of the dead
      I bleed on her livid skin
      Thrusting myself within
      Beginning to chop through her hairless crotch
      Beyond what we know as death
      It haunts me everyday
      I hear the voice of every child
      That lies next to me decayed
      A fresh corpse, to fill with my infection
      Tortured before death, no orifice left unfilled

      Violated after death
      Virgin hole I infest
      Anal pore spewing cess
      The sacred juice I injest
      Your dead child I defile
      Necropedophile

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    2. There's something inside me
      It's, it's coming out
      I feel like killing you
      Let loose of the anger, held back too long
      My blood runs cold

      Through my anatomy, dwells another being
      Rooted in my cortex, a servant to its bidding
      Brutality now becomes my appetite
      Violence is now a way of life
      The sledge's my tool to torture
      As it pounds down on your forehead

      Eyes bulging from their sockets
      With every swing of my mallet
      I smash your fucking head in, until brains seep in
      through the cracks, blood does leak
      distorted beauty, catastrophe
      Steaming slop, splattered all over me

      Lifeless body, slouching dead
      Lecherous abcess, where you once had a head

      Avoiding the prophecy of my new found lust
      You will never live again, soon your life will end
      I'll see you die at my feet, eternally I smash your face
      facial bones collapse as I crack your skull in half

      Crushing, cranial, contents

      Draining the snot, I rip out the eyes
      Squeezing them in my hands nerves are incised
      Peeling the flesh off the bottom of my weapon
      Involuntarily pulpifying facial regions

      Suffer, and then you die
      Torture, pulverized

      At one with my sixth sense, I feel free
      To kill as I please, no one can stop me

      Created to kill, the carnage continues
      Violently reshaping human facial tissue

      Brutality becomes my appetite
      Violence is now a way of life
      The sledge's my tool to torture
      As it pounds down on your forehead

      Eliminar
    3. Alive alone now that they've gone dead but unburied
      I've seen it unfold, terrible scenes of agony
      Eyes in the darkness
      Echoing their madness

      The sights that have passed before them
      Watching as though it has never happened
      Now I only listen to what is not spoken

      Murder, hatred
      Anger, Savage
      Killings I have caused
      more than can be counted
      orgies of sadism
      And sexual perversion
      Virgin
      Tied to my mattress
      Legs spread wide
      Ruptured bowel, yanked
      From her insides
      Devirginized with my knife
      Internally bleeding
      Vagina, secreting
      her blood-wet pussy
      I am eating
      on her guts I am feeding
      Mutilated with a machete
      I fucked her dead body
      The first and last
      Your life's only romance
      My knife's jammed in your ass
      As you die you orgasm

      Pass on to the dead
      Nerve trembling convulsions
      No longer looking human

      I never see them, but I know they're there
      Locked in my subconcious
      Obscene memories I thought I'd forgotten
      Haunting unrealities
      Tear at me
      Hold her arms
      Her mouth taped shut
      Screams unheard
      Out pour her guts

      Layers of flesh peeling away
      Languish in your own decay
      descriptions of my killings
      bone chilling

      Terror, tear, her
      Virgin cunt

      Virgins are my victims
      Their tight interiors I explore
      Sharpened utensils of torture
      Now inserted inside of her
      Sex organs extracted for eating
      On her liver I am gnawing

      Forbidden lust for guts
      Ripped from her cunt
      Tears of blood cry down her thigh

      I ram my fist inside her hole
      From her crotch piss now flows
      Rectum filled with shit
      I fucked her emptied body
      Until she became stiff

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    4. Hey, Jude, don't make it bad
      Take a sad song and make it better
      Remember to let her into your heart
      Then you can start to make it better

      Hey, Jude, don't be afraid
      You were made to go out and get her
      The minute you let her under your skin
      Then you begin to make it better

      And anytime you feel the pain,
      Hey, Jude, refrain
      Don't carry the world upon your shoulders
      For well you know that it's a fool
      Who plays it cool
      By making his world a little colder

      Nah, nah nah, nah nah, nah nah, nah nah

      Hey, Jude, don't let me down
      You have found her, now go and get her
      Remember to let her into your heart
      Then you can start to make it better

      So let it out and let it in,
      Hey, Jude, begin
      You're waiting for someone to perform with
      And don't you know that it's just you,
      Hey, Jude, you'll do
      The movement you need is on your shoulder

      Nah, nah nah, nah nah, nah nah, nah nah yeah

      Hey, Jude, don't make it bad
      Take a sad song and make it better
      Remember to let her under your skin
      Then you'll begin to make it better, better, better, better, better... oh!

      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude (Jude)
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude (yeah, yeah, yeah)
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude (don't make it bad, Jude)
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude (take a sad song and make it better)
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude (oh, Jude)
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude (Jude, hey, Jude, whoa)
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude (ooh)
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude
      Nah, nah nah, nah nah, nah, nah, nah nah,
      Hey, Jude [fade out]

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  8. Este comentario ha sido eliminado por el autor.

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Hola, actualmente estoy trabajando en un blog de investigación sobre la salud energética... Esto me lleva mucho tiempo e intentaré contestar todos los comentarios lo más rápido posible, agradecería que el esfuerzo que aplico en contestar los comentarios se recompensara dando a "me gusta" o a "compartir" en uno de los siguientes enlaces.
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Gracias!

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