
Estequiometria , repaso
Authored by JOSE AVELLANEDA MACHACUAY
Chemistry
3rd Grade
Used 13+ times

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8 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
¿Cuántos gramos de hierro (Fe) hay que hacer reaccionar con suficiente ácido clorhídrico para formar 4,5 mol de hidrógeno (H2)?
Datos PA: Fe=56; O=16; H=1; Cl=35,5
2 Fe + 6 HCl → 2 FeCl3 + 3 H2
120 g
150 g
145 g
168 g
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Según la ecuación
2K+2H2O→2KOH+H2
los gramos de K (PA=39) que se requieren para producir 4 mol de KOH son
156 g
120 g
130 g
160 g
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
¿Cuántos litros en CN de oxígeno se necesitan para la combustión completa de 0,5 mol de gas butano?
2C4 H10+13O2→8CO2+10H2O
60 g
72 , 8 g
70 g
75 g
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Se tiene la siguiente reacción de fermentación:
C6 H12 O6→2C2H2OH(ac)+2CO2(g)
Si se consume 9 gramos de glucosa, ¿qué volumen de gas a condiciones normales (CN) se pueden obtener? M: (Glucosa=180)
2 , 29 L CO2
1 , 24 L CO2
3 , 24 L CO2
2 , 24 L CO2
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
¿Cuántos litros de vapor de agua se forman cuando reaccionan 25 litros de hidrógeno con un exceso de oxígeno?
2H2+O2→2H2O
15 L H2O
24 L H2O
25 L H2O
28 L H2O
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Si se emplean 50 litros de N2 con 120 litros H2
N2+3H2→2NH3
el reactivo en exceso es
N2
NH3
H2
N.A
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
En un proceso químico se combina carburo de calcio con agua para obtener gas acetileno con hidróxido de calcio
CaC2+2H2O→C2H2+CaOH2
Si se combinan 20 mol de CaC2 con 50 mol de H2 O. ¿Cuántos moles quedan sin reaccionar?
17 mol
30 mol
20 mol
10 mol
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