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bonufazy [111]
2 years ago
6

Help me plssssssssssssssssssssss

Chemistry
2 answers:
lapo4ka [179]2 years ago
6 0

Answer:option a

Explanation:

Anna71 [15]2 years ago
3 0
The answer is the first one
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Tarnish on copper is the compound CuO. A tarnished copper plate is placed in an aluminum pan of boiling water. When enough salt
Jet001 [13]

Answer:  2.00 V

Explanation:

The balanced redox reaction is:

2Al+3Cu^{2+}\rightarrow 2Al^{3+}+3Cu

Here Al undergoes oxidation by loss of electrons, thus act as anode. Copper undergoes reduction by gain of electrons and thus act as cathode.

E^0=E^0_{cathode}- E^0_{anode}

Where both E^0 are standard reduction potentials.

Al^{3+}+3e^-\rightarrow Al E^0_{[Al^{3+}/Al]}=-1.66V

Cu^{2+}+2e^-\rightarrow Cu E^0_{[Cu^{2+}/Cu]}=0.340V

E^0=E^0_{[Cu^{2+}/Cu]}- E^0_{[Al^{3+}/Al]}

E^0=+0.34- (-1.66V)=2.00V

Thus the standard cell potential is 2.00 V

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3 years ago
What is the main function of messenger RNA?
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The right answer is C


Messenger RNA (mRNA) carries the genetic information copied from DNA in the form of a series of three-base code “words,” each of which specifies a particular amino acid. 2. Transfer RNA (tRNA) is the key to deciphering the code words in mRNA.
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