Tema 2. Les mescles
Quiz
•
Science
•
3rd Grade
•
Practice Problem
•
Medium
Eva Domenech Molero
Used 15+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Quina serà la concentració en massa (g/l) de 500ml de sèrum fisiològic que s'han preparat dissolent 4,5g de clorur de sodi en aigua?
0,009 g/l
10 g/l
9 g/l
19 g/l
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Si es dissolen 40 ml de glicerina en mig litre d'aigua, quin serà el percentatge en volum de la mescla?
20%
80%
7,4%
8%
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Observa el gràfic de solubilitats i indica quina substància té una solubilitat de 90g/100g d'aigua a 60ºC.
KBr
NaCl
KCl
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Observa el gràfic de solubilitat i indica com serà una dissolució de nitrat de sodi 20g NaNO3/100g d'aigua a 20ºC.
Concentrada
Diluïda
Saturada
Sobresaturada
5.
MULTIPLE SELECT QUESTION
5 mins • 1 pt
Observa el gràfic de solubilitat i indica les 2 opcions en que la dissolució de clorur de potassi KCl serà saturada:
A 80ºC i 50g/100g d'aigua
A 10ºC i 30g/100g d'aigua
A 50ºC i 20g/100g d'aigua
A 40ºC i 90g/100g d'aigua
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Quina és la concentració en % en massa de solut si dissolem 20g de sucre en 250g d'aigua?
8%
7,4%
20%
6,5%
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
El ferro és
element
compost
mescla homogènia
mescla heterogènia
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