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3 years ago

What is the name of the molecule below?

Chemistry

1 answer:

SIZIF [17.4K]3 years ago

3 0

Answer:

C.) 2-butyne

Explanation:

Since the molecule has 4 central carbons, it has the prefix but-.

Since the molecule has a triple bond between central carbons, it has an ending of -yne.

Since the triple bond starts on the second carbon, it has a 2 - prefix.

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Using the following data, determine the standard cell potential E^o cell for the electrochemical cell constructed using the foll

Nana76 [90]

Answer: C) 0.637 V

Explanation:

The balanced redox reaction is:

$Zn(s)+Pb^{2+}(aq)\rightarrow Zn^{2+}(aq)+Pb(s)$

Here Zn undergoes oxidation by loss of electrons, thus act as anode. Lead 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.

$Zn^{2+}(aq)+2e^-\rightarrow Zn(s)$ = -0.763

$Pb^{2+}(aq)+2e^-\rightarrow Pb(s)$ = -0.126

$E^0_{[Zn^{2+}/Zn]}=-0.763V$

$E^0_{[Pb^{2+}/Pb]}=-0.126V$

$E^0=E^0_{[Pb^{2+}/Pb]}- E^0_{[Zn^{2+}/Zn]}$

$E^0=-0.126-(-0.763V)=0.637V$

The standard emf of a cell is 0.637 V

8 0

2 years ago

Which environment is BEST for an organism that sleeps during the day and digs holes in the ground for shelter?

Zigmanuir [339]

I’d probably say a forest or a dessert

6 0

2 years ago

A 4.215 g sample of a compound containing only carbon, hydrogen, and oxygen is burned in an excess of oxygen gas, producing 9.58

Scilla [17]

Answer:

$\% O=27.6\%$

Explanation:

Hello,

In this case, for the sample of the given compound, we can compute the moles of each atom (carbon, hydrogen and oxygen) that is present in the sample as shown below:

- Moles of carbon are contained in the 9.582 grams of carbon dioxide:

$n_C=9.582gCO_2*\frac{1molCO_2}{44gCO_2}*\frac{1molC}{1molCO_2} =0.218molC$

- Moles of hydrogen are contained in the 3.922 grams of water:

$n_H=3.922gH_2O*\frac{1molH_2O}{18gH_2O} *\frac{2molH}{1molH_2O} =0.436molH$

- Mass of oxygen is computed by subtracting both the mass of carbon and hydrogen in carbon dioxide and water respectively from the initial sample:

$m_O=4.215g-0.218molC*\frac{12gC}{1molC} -0.436molH*\frac{1gH}{1molH} =1.163gO$

Finally, we compute the percent by mass of oxygen:

$\% O=\frac{1.163g}{4.215g}*100\% \\\\\% O=27.6\%$

Regards.

5 0

3 years ago

Approximately how old is the Sun?

malfutka [58]

The answer is C. 4.6 billion years. Hoped I helped. :)

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3 years ago

Read 2 more answers

What eventually happens to gas if its pressureis increased?

balu736 [363]

Answer:

the rate increases

Explanation:

they are closer to each other, they will collide with each other more frequently and more successful collision

4 0

2 years ago