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Primer quiz "Fenómenos de la materia"

Quiz by Laura Aldana Casas

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3 questions
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  • Q1

    La composición centesimal de una sustancia es C=20,02 %; O= 26,66 %; N= 46,66%; H=6,66%. Si su peso molecular es 60 g/mol, ¿cuál es su fórmula verdadera?

    CONH

    CON2H4

    CONH2

    NH2CO4

    300s
  • Q2

    ¿Cuántos gramos de cada sustancia hay en 2,50 x 1022  moléculas de Oy  5,5 x 1021 átomos de Zn? 

    0,864 g y 1,526 g

    1,225 g y 0,301 g

    0,586 g y 0, 900 g

    1,328 g y 0,596 g

    300s
  • Q3

    De las siguientes imágenes, ¿cuál sería un cambio químico?

    Answer Image
    Answer Image
    Answer Image
    Answer Image
    300s

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