
Concentracions (Nivell Inicial)
Authored by Eduard Barrull Farré
Chemistry
12th Grade
Used 4+ times

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11 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Si hem afegit 2 grams de clorurs i hem enrasat en 2 litres de dissolució, en aquesta dissolució preparada hi trobem ............
1 gram de clorur per litre
0,5 g/l
4 g/l
Cap de les respostes són correctes
Answer explanation
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Si es troben 2 grams de solut en 2 litres de dissolvent, també podem dir que aquesta dissolució té una concentració de ....
1000 ppm
100 ppm
1 ppm
2000 ppm
Answer explanation
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
0,5 M vol dir....
0,5 mols / litre
0,5 grams / litre
0,5 mols
0,5 miligrams
Answer explanation
M ve de Molaritat...:
Molaritat vol dir els mols de solut que trobem en un litre de solució, per tant:
Mols / litre
La molaritat mola
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Si tenim 2 mols de clorurs en 4 litres de solució, quina és la molaritat?
2 M
0.25 M
1 M
0.5 M
Answer explanation
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Com es passa de grams a mols de KCl?
Amb la molaritat
Amb la massa molar que trobo a la taula periòdica
Amb la densitat
Answer explanation
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quants mols hi ha en 6 grams d'hidrògen (H2)? Dada: PM (H) = 1 g/mol
6 mols
3 mols
12 mols
Cap de les respostes és correcta
Answer explanation
7.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Respòn mitjançant càlcul mental
200 ml és el mateix que ...........
0,2 l
0,02 l
2 l
0,002 l
Answer explanation
Treu 3 zeros... i ho tindràs.
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