Tema
Q:
The reaction of hydrogen with nitrogen to produce ammonia is shown below.
If there are 12 moles of hydrogen, how many moles of nitrogen are needed to
react completely with the hydrogen?
\( \mathrm{N}_{2}(g)+3 \mathrm{H}_{2}(g) \rightarrow 2 \mathrm{NH}_{3}(g) \)
A. 36
B. 4
C. 3
D. 6
Q:
Which of the following is a reduction half-reaction?
A. \( 2 \mathrm{Cl}^{+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Cl}_{2} \)
B. \( 2 \mathrm{Cl}^{-}+2 \mathrm{e}^{-} \rightarrow \mathrm{Cl}_{2} \)
C. \( \mathrm{Cl}_{2}\left(\right. \) I \( \rightarrow \mathrm{Cl}_{2}(s) \)
D. \( \mathrm{Cl}_{2} \rightarrow 2 \mathrm{Cl}^{-}+2 e^{-} \)
Q:
Which of the following is most easily oxidized?
Click for a reduction potential chart
A. \( \mathrm{H}^{+} \)
B. \( \mathrm{Ni}^{2+} \)
C. \( \mathrm{Fe}^{3+} \)
D. \( \mathrm{Fe}^{2+} \)
Q:
The half-reaction at the anode in an electrochemical cell is given below. What
other half-reaction would most likely occur at the cathode to produce a
nonspontaneous reaction?
\( \mathrm{Ag}(s) \rightarrow \mathrm{Ag}^{+}(a q)+\mathrm{e}^{-} \)
Click for a reduction potential chart
A. \( \mathrm{Ni}^{2+}(a q)+2 \mathrm{e}^{-} \rightarrow \mathrm{Ni}(s) \)
B. \( \mathrm{Zn}^{-}(s) \rightarrow \mathrm{Zn}^{2+}(a q)+2 \mathrm{e}^{-} \)
C. \( \mathrm{Ag}^{+}(a q)+\mathrm{e}^{-} \rightarrow \mathrm{Ag}(s) \)
D. \( \mathrm{Hg}^{2+}(a q)+2 \mathrm{e}^{-} \rightarrow \mathrm{Hg}( \) ( \( ) \)
Q:
Which reaction occurs at the anode in an electrochemical cell?
\[ \begin{array}{l}\text { A. } \mathrm{Zn}^{2+}(a q)+\mathrm{Cu}(s) \rightarrow \mathrm{Zn}(s)+\mathrm{Cu}^{2+}(a q) \\ \text { B. } \mathrm{Zn}^{2+}(a q)+2 \mathrm{e}^{-} \rightarrow \mathrm{Zn}(s) \\ \text { c. } \mathrm{Zn}(s) \rightarrow \mathrm{Zn}^{2+}(a q)+2 \mathrm{e}^{-} \\ \text {D. } \mathrm{Zn}(s)+\mathrm{Cu}^{2+}(a q) \rightarrow \mathrm{Zn}^{2+}(a q)+\mathrm{Cu}(s)\end{array} \]
Q:
What mass of methanol \( \left(\mathrm{CH}_{3} \mathrm{OH}\right) \) is produced when 86.04 g of carbon
monoxide reacts with 14.14 g of hydrogen?
\( \mathrm{CO}(\mathrm{g})+2 \mathrm{H}_{2}(\mathrm{~g}) \rightarrow \mathrm{CH}_{3} \mathrm{OH}(\mathrm{l}) \)
A. 7.07 g
B. 112.14 g
C. 96.12 g
D. 84.06 g
Q:
la tabla periodica esta organizada
Q:
como se conforma un atom
Q:
T1. L'acido cloridrico si forma a partire da cloro e
idrogeno gassosi.
Sapendo che \( 30,5 \mathrm{~L} \) di idrogeno e \( 96,71 \mathrm{~g} \) di cloro
formano \( 99,46 \mathrm{~g} \) di acido cloridrico, calcola la densità
dellidrogeno.
Q:
ALUMINOIA:
ASIGNATURA: QUIMICA II
CURSO: STO ANOO
1. DETALE LAS CARACTERISTICAS MAS IMPORTANTES DE LA UNION IONICA OLA
UNION COVALENTE.
2. REPRESENTE O COMPLETE LAS SIGUIENTES REACCIONES QUIMICAS CON LA
RESPECTIVA NOMENCLATURA:
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