
reazioni
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Chemistry
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University
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Medium
eleonora franchini
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17 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Che volume di KBr 1.50 M ottengo da 15.6 mL di KBr concentrato 9.65 M?
150. mL
150 L
1.00 L
100. mL
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Quanti grammi di AgNO3 sono necessari per preparare una soluzione 0.125M in 250 cm3 di acqua?
6.03g
0.5g
5.3g
84.9g
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following chemical equations is an example of a double replacement reaction?
2Al2O3 --> 4Al + 3O2
2C5H10 + 15O2 --> 10CO2 + 10H2O
2MgCl2 + Na2CO3 --> 2 NaCl + MgCO3
K2O + H2O --> 2 KOH
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Quali sono i coefficienti stechiometrici per bilanciare la reazione?
1,5,4 - 3,2,4,6
2,5,4 - 6,2,4,8
2,10,8 - 1,2,5,8
2,10,6 - 3,2,5,6
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Quali sono i coefficienti delle seguenti reazioni?
a) H2PO4- + Zn→ PH3 + Zn++ (ambiente acido)
b) As2O3 +Al+HCl→AsH3 +AlCl3 +H2O
a) 1,4,9 - 1,4,4
b) 1,4,12 - 1,4,3
a) 1,2,8 - 1,2,4
b) 1,2,6 - 1,2,6
a) 1,2,4 - 1,2,2
b) 1,1,3 - 1, 1, 3
a) 1,2,8 - 1,2,4
b) 1,4,4 - 1,2,3
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Sono in laboratorio e voglio sintetizzare Permanganato di potassio.
reazione1: biossido di manganese + idrossido di potassio + ossigeno -> manganato di potassio + acqua.
reazione 2: manganato di potassio + anidride carbonica + acqua -> permanganato di potassio + bicarbonato di potassio + MnO2.
Calcolare quante moli di manganato di potassio avanzano dalla prima reazione.
nessuna, le uso tutte
non ne ho a sufficienza per completare la seconda reazione
1 mole
3 moli
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Qual è uno dei prodotti di questa reazione: nitrato di argento + cloruro ferrico?
Fe(NO2)3
Fe(NO3)3
Fe(NO3)2
AgCl3
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