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saul85 [17]
2 years ago
12

10)

Chemistry
1 answer:
Alex787 [66]2 years ago
4 0
B) It transports food
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A solution composed of 30.6g NH3 in 81.3g of H20. Calculate the mole fraction for NH3 and H20
irina [24]

Answer:

0.286 moles

Explanation:

i hope this is helpful for you

4 0
2 years ago
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The _______________________________________ is often referred to as the powerhouse of the cell
almond37 [142]

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Mitochondria

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The electron affinity of an element is positive if energy is absorbed during the process of accepting an electron and negative i
julsineya [31]

Answer:

See explanation

Explanation:

Electron affinity is the energy released when an extra electron is added to a neutral gaseous atom. A negative value of electron affinity indicates that energy is given out and vice versa.

Metals have positive electron affinity since electrons rarely accept electrons, so;

Na(g)+ 1e^- → Na^-(g)      positive

Mg(g)+1e^- → Mg^-(g)      positive

For the last case; Br(g)+ 1e^- → Br^-(g), the electron affinity for the non-metals is negative. hence the answer

5 0
2 years ago
According to the aufbau principle,_____.
Softa [21]

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Hi there!

The correct answer to this question is: electrons enter orbitals of lowest energy first.

5 0
3 years ago
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When fluorine gas combines with water vapor, the following reactions occurs.
jonny [76]
Hello!

The Chemical reaction is the following:

2F₂(g) + 2 H₂O(g) → O₂(g) + 4HF(g)

If we assume that all the gases are ideal gases, we can describe the coefficients of this reaction as Volume rather than moles, so we can apply the following equations:

2 L F_2* \frac{2 L H_2O}{2 L F_2}=2 L H_2O \\ \\ 2 L F_2* \frac{1 mol O_2}{2 L F_2}=1 mol O_2 \\ \\ 2 L F_2* \frac{4 mol HF}{2 mol F_2}= 4 mol HF

So, 2 L of Water Vapor reacts with the fluorine; and 1 L of Oxygen and 4 L of Hydrogen Fluoride are produced.

Have a nice day!

6 0
3 years ago
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