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Alecsey [184]
3 years ago
14

A student told me that it would take 3.5 weeks to read their chemistry textbook from start to finish. How long would it take in

seconds?
Chemistry
1 answer:
frutty [35]3 years ago
5 0
Answer: 2116800 seconds
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A voltaic cell is constructed in which the anode is a Fe|Fe2 half cell and the cathode is a Cd|Cd2 half cell. The half-cell comp
Svetradugi [14.3K]

Answer: The Anode reaction is Fe(s)\rightarrow Fe^{2+}(aq)+2e^-

Explanation:

Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.

Oxidation reaction is defined as the reaction in which a substance looses its electrons.Oxidation occurs at anode.

Anode : Fe(s)\rightarrow Fe^{2+}(aq)+2e^-

Reduction reaction is defined as the reaction in which a substance gains electrons. Reduction occurs at cathode.

Cathode : Cd^{2+}(aq)+2e^-\rightarrow Cd(s)

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3 years ago
What role do wolves play in the tundra?
nydimaria [60]
Predator? Not sure if that’s what your looking for.
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The mole fraction of NaCl in an aqueous solution is 0.132. What is the weight/weight percent of NaCl in this solution?
Marrrta [24]

Answer:

\% w/w=33.1\%

Explanation:

Hello,

In this case, since the solution is formed by sodium chloride and water, we understand that for one mole of solution, we have 0.132 moles of sodium chloride and 0.868 moles of water, therefore, by using their molar masses we can compute their masses in the solution:

m_{NaCl}=0.132molNaCl*\frac{58.44gNaCl}{1molNaCl}=7.714gNaCl\\ \\m_{H_2O}=0.868molH_2O*\frac{18gH_2O}{1molH_2O}=15.624gH_2O

Thereby, we can compute the weight/weight percent as follows:

\% w/w=\frac{m_{NaCl}}{m_{H_2O}+m_{NaCl}}*100\%

So we use the previously computed masses:

\% w/w=\frac{7.714g}{7.714g+15.624g}*100\%  \\\\\% w/w=33.1\%

Best regards.

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