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Mumz [18]
2 years ago
13

Use the ideal-gas law to estimate the number of air molecules in your physics lab room, assuming all the air is N2. Assume a roo

m size of 18 ft × 18 ft × 18 ft . Assume a temperature of 20∘C.
Chemistry
1 answer:
stiv31 [10]2 years ago
4 0

Answer:

4.13×10²⁷ molecules of N₂ are in the room

Explanation:

ideal gases Law → P . V = n . R . T

Pressure . volume = moles . Ideal Gases Constant . T° K

T°K = T°C + 273 → 20°C + 273 = 293K

Let's determine the volume of the room:

18 ft . 18 ft . 18ft = 5832 ft³

We convert the ft³ to L → 5832 ft³ . 28.3L / 1 ft³ = 165045.6 L

1 atm .  165045.6 L = n . 0.082 L.atm/mol.K . 293K

(1 atm .  165045.6 L) / 0.082 L.atm/mol.K . 293K = n

6869.4 moles of N₂ are in the room

If we want to find out the number of molecules we multiply the moles by NA

6869.4 mol . 6.02×10²³ = 4.13×10²⁷ molecules

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Answer:

32(molecular mass has no unit )

Explanation:

(16)(o2)

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5 0
2 years ago
4 AlF3 + 3 O2 ----------> 2Al2O3 + 6 F2
anyanavicka [17]

Explanation:

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8 0
3 years ago
2. A sample of gas has a pressure of 195 kPa and a volume of 3.50 L. If the pressure
zhannawk [14.2K]

Answer:

<h2>4.55 L</h2>

Explanation:

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P_1V_1 = P_2V_2

Since we're finding the new volume

V_2 =  \frac{P_1V_1}{P_2}  \\

We have

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We have the final answer as

<h3>4.55 L</h3>

Hope this helps you

7 0
3 years ago
Dalton assumed that all atoms of the same element were identical in all their properties. Explain why this assumption is not val
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This assumption is not valid because, there are some elements which exist in two or more forms;  they have the same atomic number but differ in their mass number, which meas that they possess different number of neutrons. These type of element are called isotopes. Isotope have the same atomic number  and similar physical and chemical properties but they have different number of neutrons and therefore possess different masses.  
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2 years ago
Escriba la formula de:
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Answer:

<h2>Translate your language to English </h2>
4 0
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