
Estequio
Authored by Juan López
Chemistry
University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Con 5 moles de hidróxido de potasio (KOH). ¿Cuántas moles de H2O se forman?. (K=39,1; C=12; H=1; O=16)
CO2 + 2 KOH → K2CO3 + H2O
5,2 mol H2O
1,5 mol H2O
2,5 mol H2O
4,5 mol H2O
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
De la reacción: NaO + H2O → 2NaOH
(Na = 23; O = 16; H = 1) Con 3,5 moles de NaO, ¿cuántos gramos de NaOH se obtiene?
550 g
280 g
158 g
358 g
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ley de la conservación de la masa, menciona que la masa no se crea ni se destruye, solo se transforma. Determine la respuesta incorrecta:
H2 + Cl2 → 2HCl
1 mol + 3 moles → 2 moles
1 molécula + 1 moléculas → 2 moléculas
2 g + 71 g → 73 g
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
CO + 2H2 → CH4O
¿Cuántos gramos de CH4O, se pueden producir a partir de 7 g de monóxido de carbono CO?
(C = 12; O = 16; H = 1)
4 g CH40
16 g CH4O
12 g CH4O
8 g CH4O
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En la reacción 2CO -> O2 + 2C ; se han puesto 20 g de C.
luego se obtienen 20 g de O2 y 20 g de C
luego se obtienen 15 g de O2 y 5 g de C
luego se obtienen 5 g de O2 y 5 g de C
No se obtiene nada
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
¿Cuánta agua se produce si reacciona 288 gramos de oxígeno?
4NH3 + 3O2 --> 2N2 + 6H2O
324 g
216 g
108 g
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
¿Cuántos gramos de NH3 se forman, si se hacen reaccionar 54 g de H2O?
Mg3N2 + 6H2O --> 3Mg(OH)2 + 2NH3
108
17
34
165
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