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3 years ago

Helpppppppppppp me pleaseeeeeee

Chemistry

1 answer:

Cloud [144]3 years ago

4 0

Answer:

VX a small town called to the highest frequency and I wla kmo the

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How many pounds of carbon dioxide are produced from burning one gallon of gasoline? Assume gasoline is 100% octane, and the dens

OlgaM077 [116]

Answer:

20.10 pounds of carbon dioxide are produced from burning one gallon of gasoline.

Explanation:

Volume of the gasoline = V = 1 gal = 3785.41 mL

Density of the gasoline = d = 0.78 g/ml

Mass of gasoline = m = ?

$m=d\times V=0.78 g/mL\times 3785.41 mL=2952.62 g$

Moles of gasoline = $\frac{2952.62 g}{114 g/mol}=25.90 mol$

$2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O$

According to reaction, 2 moles of octane gives 16 moles of carbon dioxide gas.

Then 25.90 moles of octane will give:

$\frac{16}{2}\times 25.90 mol=207.20 mol$

Mass of 207.20 moles of carbon dioxide gas:

= 207.20 mol × 44 g/mol = 9,116.86 g

1 pound = 453.592 grams

$9,116.86 g=\frac{9,116.86}{453.592} pounds=20.10 pounds$

20.10 pounds of carbon dioxide are produced from burning one gallon of gasoline.

8 0

3 years ago

In aqueous solution the Ni2" ion forms a complex with four ammonia molecules. Write the formation constant expression for the eq

777dan777 [17]

Answer:

The correct equation is " $\frac{[Ni(H_2O)_3 (NH_3)]^{2+}}{[Ni(H_2O)_4]^{2+} [NH_3]}$ ".

Explanation:

According to the question,

Throughout an aqueous solution, $Ni^{2+}$ exist as $[Ni(H_2O)_4]^{2+}$

So,

⇒ $[Ni(H_2O)_4]^{2+} + 4NH_3 \rightleftharpoons [Ni(NH_3)_4]^{2+} + H_2O$

⇒ $K_f = \frac{[Ni(NH_3)_4]^{2+}}{[Ni(H_2O)_4^{2+}] [NH_3]^4}$

Here, we have excluded $[H_2O]$ as concentration of water will be const.

Now,

This formation of $[Ni(NH_3)_4]^{2+}$ proceeds via several steps,

Step 1:

⇒ $[Ni(H_2O)_4]^{2+}+NH_3 \rightleftharpoons [Ni(H_2O)_3 (NH_3)]^{2+} + H_2O$

⇒ $K_1 = \frac{[Ni(H_2O)_3 (NH_3)]^{2+}}{[Ni(H_2O)_4]^{2+} [NH_3]}$

5 0

3 years ago

PLEASE HELP ME I BEG PLEASE!!!!

cricket20 [7]

1.Decomposition i think
2.boiling
3.It is a solid at room temperature and pressure.
4.<span>The base donates a hydrogen ion.
5.That causes the oxidation of another element
6.</span>MnO2
7.When a substance is reduced, electrons are lost.
8.True I think
9.False
10.True

Hope these are correct

3 0

4 years ago

Read 2 more answers

What is potential energy

Elanso [62]

Answer:

the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.

Explanation:

7 0

3 years ago

What happens when Magnesium hydroxide is heated? (Decomposition)

Tema [17]