
Test de reacciones químicas
Authored by Hugo Rodríguez Pérez
Science, Physics, Chemistry
8th Grade
Used 3+ times

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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Las sustancias iniciales en un proceso químico se denominan reactivos
Falso
Verdadero
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Los productos en una ecuación química están ubicados :
sobre la flecha
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Identifica el reactivo y producto de Na + Cl-------> NaCl
Reactivo: NaCl; producto: Na y Cl
Reactivo: Na y Cl; prodructo: NaCl
Reactivo Na y NaCl; producto: Cl
Reactivo Cl y NaCl; producto: Na
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
la Ley de la conservación de la materia o de la masa, fue propuesta por Antoine Lavoissier, y en ella se afirma que:
La materia se crea a partir de otra preexistente.
La materia no se crea, ni se destruye, solo se transforma.
La materia se conserva igual en una reacción química.
Una ecuación balanceada no cumple con la conservación de la masa.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En la ecuación anterior, cómo se les llama a las letras (O, Mg...) .
Símbolos
Coeficientes
Reactivo y Producto
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En la ecuación anterior que representa el número 2 de color verde.
Coeficiente estequiométrico
Subíndice
Producto
7.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
Halla la suma de los coeficientes estequiométricos de esta ecuación
3
4
5
6
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