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3 years ago

What is N? (Needed electrons)

Chemistry

1 answer:

lianna [129]3 years ago

8 0

Do you know what is meant by needed? does it mean lone pairs?

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Be sure to answer all parts. In the average adult male, the residual volume (RV) of the lungs, the volume of air remaining after

Alenkinab [10]

Answer:

For a: The number of moles of air present in the RV is 0.047 moles

For b: The number of molecules of gas is $2.83\times 10^{22}$

Explanation:

For a:

To calculate the number of moles, we use the equation given by ideal gas follows:

$PV=nRT$

where,

P = pressure of the air = 1.00 atm

V = Volume of the air = 1200 mL = 1.2 L (Conversion factor: 1 L = 1000 mL)

T = Temperature of the air = $37^oC=[37+273]K=310K$

R = Gas constant = $0.0821\text{ L. atm }mol^{-1}K^{-1}$

n = number of moles of air = ?

Putting values in above equation, we get:

$1.00atm\times 1.2L=n_{air}\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 310K\\n_{air}=\frac{1.00\times 1.2}{0.0821\times 310}=0.047mol$

Hence, the number of moles of air present in the RV is 0.047 moles

For b:

According to mole concept:

1 mole of a compound contains $6.022\times 10^{23}$ number of molecules.

So, 0.047 moles of air will contain $(0.047\times 6.022\times 10^{23})=2.83\times 10^{22}$ number of gas molecules.

Hence, the number of molecules of gas is $2.83\times 10^{22}$

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3 years ago

On the periodic table, the majority of elements are classified as

Roman55 [17]

On the periodic table, the majority of elements are classified as "Metals"

In short, Your Answer would be Option A

Hope this helps!

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Which of the following can’t be separated into simpler substances or converted into another substance by chemical process?

timofeeve [1]

Your answer would be an Element can't be separated into simpler substances or converted into another substance by chemical process.

Hope that helps!!!

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3 years ago

What are the importance of chemistry?

Yuki888 [10]

Answer:Chemistry is important for meeting our needs of food,clothing,shelter,health,energy,and clan air,water,and soil.

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1 year ago

The precision of a measuring instrument is based on the fineness of its scale subdivisions.

Liono4ka [1.6K]

The answer is True . The precision of a measuring is based on the fitness of its scale subdivisions

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3 years ago

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