
Prueba Diag. de Química 11°
Authored by Alis Velasquez
Chemistry
11th Grade

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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
H2S + SO2 -------- S + H20 Los coeficientes que balancean la siguiente ecuación química, son:
2,1,3,2
2,2,3,2
2,1,2,2
2,1,1,2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2 moles de H2SO3 poseen una masa de:
82
41g
164g
98g.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
El porcentaje en peso de cada elemento en el ácido sulfúrico (H2SO4) es : P.A.(H = 1, S = 32, O = 16
2,04% H; 32,65 S; 65,31% O
3,06% H; 39,87 S; 57,07% O
4,08% H; 14,52 S; 81,4% O
1,02% H; 49,37 S; 49,61% O
9,51% H; 62,10 S; 37,39% O
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es la fórmula empírica de un hidrocarburo que contiene 20% en peso de hidrógeno Y Carbono?
CH4
C2H2
CH3
CH5
C3H8
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Una masa de hidrógeno gaseoso ocupa un volumen de 230 litros en un tanque a una presión de 1.5 atmósferas y a una temperatura de 35°C. Calcular, a) ¿Cuántos moles de hidrógeno se tienen?, b)¿ A qué masa equivale el número de moles contenidos en el tanque?
1364 n y 2827g
282.7 g y 64.13 mol
1364 mol y 2727 g
13.64mol y 27.28 gramos
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Una muestra de gas ocupa 12 L a la presión de 2 atm. ¿Cuál será su volumen si la presión aumenta a 3 atm?
8000ml
0.008L
8.0L
ninguna de las anteriores
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Se tienen 10 g. butano (C4H10) Hallar:
nº moles.
masa en gramos de una molécula.
volumen que ocupa a 18ºC y 780mm. Hg.
Si está en un recipiente de 2l. a 27ºC ¿Cuál será su presión?
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