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 O2 y 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?
300s