
examen quimestral
Authored by Gloria Benitez
Chemistry
1st Grade - Professional Development
Used 3+ times

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10 questions
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1.
MULTIPLE SELECT QUESTION
3 mins • 1 pt
Determine la masa del cloruro de zinc si tenemos 85 gr de zinc y 105 gr de ácido clorhídrico
a partir del reactivo limitante y exceso. (igualar la ecuación)
Zn + HCl --- ZnCl2 + H2
100 gr
121 gr
131gr
141gr
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
determine el rendimiento porcentual si se hace reaccionar 10 gr de oxido de aluminio, con un exceso de ácido clorhídrico para obtener 25 gr de cloruro de aluminio.
Al2O3 + HCl ---- AlCl3 + H2O
15,62
25,88 gr
96,59 gr
75,96 gr.
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
las soluciones acuosas son:
mezclas homogéneas en el cual una sustancia se disuelve en agua.
mezclas heterogéneas en el cual una sustancia se disuelve en agua.
disoluciones homogéneas en el cual una sustancia se disuelve en agua.
soluciones heterogéneas en el cual una sustancia se disuelve en agua.
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Identifique si es un compuesto soluble o insoluble
NaOH
soluble
acuosa
insoluble
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
determine el numero de oxidación del Mn
SrMnO4
+4
+6
+2
+3
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
escriba el numero de oxidación del Rb3
+1
0
+2
+3
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
escoja la fórmula del óxido del cadmio
CdO2
CdO
Cd2O2
Cd2O
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