
biennio marzo
Authored by Mari 4P
Chemistry
2nd Grade
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20 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Se la concentrazione di Pb(II) in un campione di acqua potabile è 2,41 ∙10‒8 M, tenendo conto che un individuo ingerisce 2,0 L di acqua al giorno, calcolare la massa di Pb(II) ingerita in un mese (30 giorni).
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Indicare l’affermazione ERRATA riguardante le reazioni redox:
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Indicare i coefficienti, posti in ordine casuale, che bilanciano la seguente reazione: CrCl3 + (NH4)2S + H2O → NH4Cl + H2S + Cr(OH)3
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
La combustione del butano procede come segue: 2 C4H10 + 13 O2 → 8 CO2 + 10 H2O Indicare la quantità massima di CO2 ottenibile se 5,00 g di C4H10 reagiscono con 25,0 g di O2.
20 g
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Uno studente sta pesando un volume noto di una soluzione. Quale informazione sta cercando?
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Indicare il numero di ossidazione del cloro in Cl 2O
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Indicare l’affermazione ERRATA tra le seguenti:
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