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Svetach [21]
3 years ago
15

Air is a _______. a. homogeneous mixture c. compound of oxygen and nitrogen b. heterogeneous mixture d. pure substance

Chemistry
1 answer:
SVEN [57.7K]3 years ago
7 0

a because it was a combination of lots of subtances like CO2, oxygen, nitrogen,... and u cant see air so it is a homogenous mixture

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The ____________________ package and distribute materials to other parts of the cell.
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The Golgi, that’s the answer:)
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3 years ago
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What causes a spectrum of colors to appear when light moves through a prism?
Firdavs [7]

Answer:

It is refracted out, B

Explanation:

When the light travels through the prism, it refracts the colors out of it. In which a rainbow sort coloration is released from the other side.

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The energy change ∆H associated with the reaction NBr3(g) + 3 H2O(g) → 3 HOBr(g) + NH3(g) is +81 kJ. NBr3 is arranged with all o
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Answer:

155 kJ

Explanation:

The energy change will be the energy of the reactants less the energy of the products. And the energy of each compound is the sum of the energy of their bonds. Let's call y the N-Br strength.

3HOBR = 3x(459 + 201) = 1980 kJ

NH₃ = 3x386 = 1158 kJ

3H₂O = 3x(2x459) = 2754 kJ

NBr₃ = 3y

3y + 2754 - 1158 - 1980 = 81

3y -384 = 81

3y = 465

y = 155 kJ

6 0
3 years ago
Please help me?!!!!!!!
SCORPION-xisa [38]

Answer:

this is true! good luck!

4 0
3 years ago
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A voltaic cell is made using a lead electrode and copper electrode. The electrolytes for each half cell are lead nitrate and cop
lisov135 [29]

The cell notation is Pb_{(s)}  Pb^{2+} _{(aq)} ║Cu^{+2}_{aq}  Cu_{(s)} and the cell potential is 0.464

The reaction occurred while losing of hydron is known as oxidation reaction

We can also tell that the reaction occurred while gaining of oxygen atom is known as oxidation reaction.

The reaction occurred while gaining of hydrogen is known as reduction reaction or we can say that the reaction occurred while losing oxygen atom is known as reduction reaction

An electrochemical cell's cell potential is defined as the difference in potential between two half cells. The electrons' capacity to go from one half cell to the other is what causes the potential difference. As a result of the chemical reaction being a redox reaction, electrons can travel across electrodes.

Calculating the Cell potential

E°cell  = E°(reduction) - E°(oxidation)

           = 0.34 - (-0.0124)

           = 0.464

Hence the cell potential is 0.464

Learn more about Cell potential here

brainly.com/question/11638563

#SPJ10

6 0
2 years ago
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