
Esercitazioni
Quiz
•
Chemistry
•
Professional Development
•
Practice Problem
•
Hard
Arianna Eccheli
Used 2+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Prepari una soluzione di 3,55 g di Na2SO4 in 500 mL di soluzione. Ottieni una soluzione:
0.2 M
0.05 M
0.02 M
0.5 M
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Quale soluzione di KI ha una concentrazione di 15% m/m?
30 g di KI in 200 g di H2O
20 g di KI in 180 g di H2O
30 g di KI in 170 g di H2O
20 g di KI in 250 g di H2O
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Calcola la concentrazione % m/m di una soluzione ottenuta sciogliendo 72 g di nitrato di bario (Ba(NO3)2) in 200 g di acqua.
2.65%
265 %
0.265 %
26.5%
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Quale campione ha la massa maggiore?
2,0 mol di Zn
2,0 mol di Ir
2,0 mol di Ge
2,0 mol di C
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Calcola la concentrazione % V/V ottenuta sciogliendo 15 mL di alcol etilico in 85 mL di acqua.
15 %
1.5 %
2.5 %
25 %
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
La molarità è definita come:
grammi di soluto per kilogrammo di solvente
moli di soluto per litro di soluzione
moli di soluto per kilogrammo di solvente
kilogrammi di soluto per moli di soluzione
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Quale soluzione contiene 1,5 moli di ioni?
1,0 L di KI 0,75 M
1,5 L di NaCl 0,5 M
0,5 L di (NH4)3PO4 0,75 M
0,5 L di NaBr 3,0 M
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