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3 years ago

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What is the measurement 111.009 mm rounded off to four significant digits? a. 111 mm b. 111.0 mm c. 111.01 mm d. 110 mm Please s

elect the best answer from the choices provided

1 answer:

faltersainse [42]3 years ago

3 0

Four significant figures would be B. Because 0's before the decimal are not important, but 0's after the decimal are.

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Write a chemical equation for the reaction that occurs in the following cell: Cu|Cu2+(aq)||Ag+(aq)|Ag. Of the two metals, copper

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Answer is given below.

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Anode is that electrode where oxidation occurs. Cathode is that electrode where reduction occurs.

In cell representation, half cell present left to salt-bridge notation $(\parallel )$ is anodic system and another half cell present right to salt-bridge notation $(\parallel )$ is cathodic system.

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oxidation: $Cu-2e^{-}\rightarrow Cu^{2+}(aq.)$

[reduction: $Ag^{+}+e^{-}\rightarrow Ag$ ] $\times 2$

-----------------------------------------------------------------------------------------------

chemical equation: $Cu+2Ag^{+}(aq.)\rightarrow Cu^{2+}(aq.)+2Ag$

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