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2 years ago

Help asap pls- brainliest and 20 points -

Chemistry

1 answer:

MAXImum [283]2 years ago

6 0

Considering the Dalton's law, the total pressure of the tank is 5.95 atm.

<h3>Dalton's law</h3>

The pressure exerted by a particular gas in a mixture is known as its partial pressure.

So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:

$P_{T} =P_{1} + P_{2} + ... + P_{n}$

where n is the amount of gases present in the mixture.

This relationship is due to the assumption that there are no attractive forces between the gases.

<h3>Total pressure of the tank</h3>

A tank of gas has partial pressures of nitrogen and oxygen equal to 1.61 atm and 4.34 atm, respectively.

The total pressure of the tank is calculated as:

$P_{T} =P_{nitrogen} + P_{oxygen}$

So, replacing the respective values:

$P_{T} =1.61 atm+ 4.34 atm$

Solving:

$P_{T} =5.95 atm$

Finally, the total pressure of the tank is 5.95 atm.

Learn more about Dalton's law:

<u>brainly.com/question/25181467?referrer=searchResults</u>

<u>brainly.com/question/14119417</u>

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Answer:

Explanation:

count given by old sample = .97 disintegrations per minute per gram

count given by fresh sample = 6.68 disintegrations per minute per gram

Half life of radioactive carbon = 5568 years

rate of disintegration

dN / dt = λ N

In other words rate of disintegration is proportional to no of radioactive atoms present . As number reduces rate also reduces .

Let initial no of radioactive be N₀ and after time t , number reduces to N

N₀ / N = 6.68 / .97

Now

$N=N_0e^{-\lambda t}$

$\frac{N}{N_0} =e^{-\lambda t}$

$\frac{6.68}{.97} = e^{\lambda t}$

λ is disintegration constant

λ = .693 / half life

= .693 / 5568

= .00012446 year⁻¹

Putting the values in the equation above

$\frac{6.68}{.97} = e^{.00012446\times t}$

$6.8866 = e^{.00012446\times t}$

1.929577 = .00012446 t

t = 15503.6 years .

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