Estequiometría y balanceo de reacciones químicas

Quiz
•
Chemistry
•
9th Grade
•
Easy
Educaos Educaos
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11 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Below you will be able to analyze the attached image and based on it, select the answer you consider correct. Let's go for it!
What is a reducing agent in a redox reaction?
A continuación podrás analizar la imágen adjuntada y con base en ella, selccionar la respuesta que consideres correcta. ¡Vamos con toda!
¿Qué es un agente reductor en una reacción redox?
Una sustancia que gana electrones y se oxida.
Una sustancia que pierde electrones y se reduce.
Una sustancia que no participa en la reacción.
Una sustancia que no cambia su estado de oxidación.
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
How many atoms of O are present if there is no subscript following the element symbol (e.g. the oxygen in H2O?
¿Cuántos átomos de O hay si no hay subíndice después del símbolo del elemento (por ejemplo, el oxígeno en H2O?
0
1
2
3
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Is the following equation balanced?
¿Está equilibrada la siguiente ecuación?
Al + O2 --> 2Al2O3
Yes
No
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the little number after an element in a chemical equation called (highlighted in green)?
¿Cómo se llama el pequeño número que aparece después de un elemento en una ecuación química (subrayado en verde)?
2H2 + O2 --> 2H2O
Coefficient / Coeficiente
Subscript / subíndice
Atom / Átomo
Molecule / Molécula
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
How many hydrogen atoms are on each side of the equation?
¿Cuántos átomos de hidrógeno hay en cada lado de la ecuación?
2
4
6
12
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What element is being Oxidized?
¿Qué elemento se oxida?
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is a redox reaction?
¿Qué es una reacción redox?
A chemical reaction in which no change occurs. / Una reacción química en la que no ocurre ningún cambio.
A chemical reaction in which the atoms are rearranged, but the total number of electrons remains constant. / Una reacción química en la que los átomos se reorganizan, pero el número total de electrones permanece constante.
A chemical reaction in which atoms exchange electrons, changing their oxidation state. / Una reacción química en la que los átomos intercambian electrones, cambiando su estado de oxidación.
A chemical reaction in which the elements separate into their smallest components. / Una reacción química en la que los elementos se separan en sus componentes más pequeños.
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