
Soluciones químicas
Authored by Pauly Caicedo
Chemistry
12th Grade
Used 6+ times

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5 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
¿Cuántos gramos de sulfato de sodio Na2SO4, están contenidos en 500g de disolución que está al 1,5% en masa?
30g
75g
7,5g
750g
2.
MULTIPLE SELECT QUESTION
5 mins • 1 pt
Para preparar una disolución de etanol al 60% en volumen. ¿Cuál debe ser el volumen final de la disolución si hemos utilizado 75ml de etanol?
125ml
45ml
750ml
600ml
3.
MULTIPLE SELECT QUESTION
5 mins • 1 pt
Queremos preparar una disolución de agua salada de 150ml con una concentración de 30g/L. ¿Cuánta sal de debe añadir?
4500g
5g
3g
4,5g
4.
MULTIPLE SELECT QUESTION
5 mins • 1 pt
El porcentaje en masa de una solución de Ácido clorhídrico HCl es del 76% y su densidad es 1,08g/ml. ¿La concentración en g/L es?:
82080g/L
820,8g/L
70,37g/L
82,080g/L
5.
MULTIPLE SELECT QUESTION
5 mins • 1 pt
Se ha preparado una solución de 3 moles de sal (NaCl) en 700 gramos de agua (H2O). El porcentaje en masa de la solución es:
19,91%
24,86%
0,43%
8,29%
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