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12 days ago

How many moles of n2(g) would contain exactly 4.0 moles of nitrogen atoms?

Chemistry

2 answers:

lions [1K]12 days ago

4 0

Answer: The moles of $N_2$ are 2 moles.

Explanation: Given,

Moles of nitrogen atoms = 4 moles.

First, we need to determine the total number of nitrogen atoms.

Since 1 mole of nitrogen atom has $6.022\times 10^{23}$ nitrogen atoms,

Then 4 moles of nitrogen atom contain $4\times 6.022\times 10^{23}$ nitrogen atoms.

Next, we calculate the moles of $N_2$ atoms.

As $2\times 6.022\times 10^{23}$ number of nitrogen atoms is present in 1 mole of $N_2$ atoms,

And $4\times 6.022\times 10^{23}$ nitrogen atoms exist in $\frac{4\times 6.022\times 10^{23}}{2\times 6.022\times 10^{23}}=2$ moles of $N_2$ atoms.

Thus, the number of moles of $N_2$ atoms is 2 moles.

VMariaS [1K]12 days ago

4 0

Each nitrogen molecule consists of 2 nitrogen atoms.
Thus, 2 moles of nitrogen gas molecules result in 4 moles of nitrogen atoms. The answer is 2 moles.

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5 days ago

Read 2 more answers

A laboratory analysis of an unknown sample yields 74.0% carbon, 7.4% hydrogen, 8.6% nitrogen, and 10.0% oxygen. What is the empi

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Assuming we have a 100g sample, the mass of each element is as follows:
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C: (74 / 12) = 6.17
H: (7.4 / 1) = 7.4
N: (8.6 / 14) = 0.61
O: (10 / 16) = 0.625
Now, we take the smallest value to determine the ratio:
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H: 12
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C10H12NO

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6 days ago

Find the age ttt of a sample, if the total mass of carbon in the sample is mcmcm_c, the activity of the sample is AAA, the curre

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Answer:

Explanation:

In a desert cave, an artifact has been discovered. The anthropologists investigating this artifact want to determine its age. They note that the current activity level of the artifact is 9.25 decays/s, and the carbon mass present is 0.100 kg. To ascertain the artifact's age, they will employ specific constants:

r=1.2

The formula for carbon 14 activity is

$A=A_0e^{\lambda t}$

where,

$A_0$ is the initial activity of the substance

Now, solve for t

$-\lambda t=In\frac{A}{A_0}$

$t=-\frac{1}{\lambda} In(\frac{A}{A_0} )$

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since,

$A_0=\lambda r(\frac{m_c}{m_a} )$

$=-\frac{1}{\lambda} In(\frac{A\ m_a}{\lambda r m_c} )$

Thus, the age of the artifact is

$=-\frac{1}{\lambda} In(\frac{A\ m_a}{\lambda r m_c} )$

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to two significant figures = 6300 years

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6 days ago

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Answer:

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Explanation:

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$\frac{P}{T} =k$