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4 years ago

The smallest unit that retains the properties of an element is aan)

Chemistry

1 answer:

Norma-Jean [14]4 years ago

8 0

Answer:

Atom

Explanation:

An atom is the smallest unit which represents the an element.

It retains the chemical properties of an element.

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3 years ago

Calculate the solubility of nitrogen in water at an atmospheric pressure of 0.480 atm (a typical value at high altitude). Atmosp

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Answer : The solubility of nitrogen in water at an atmospheric pressure will be, $2.5125\times 10^{-4}mole/L$

Explanation :

First we have to calculate the partial pressure of nitrogen.

Formula used :

$p_{N_2}=X_{N_2}\times P_{atm}$

where,

$p_{N_2}$ = partial pressure of nitrogen = ?

$X_{N_2}$ = mole fraction of nitrogen = $7.81\times 10^{-1}$

$p_{atm}$ = atmospheric pressure = 0.480 atm

Now put all the given values in the above formula, we get :

$p_{N_2}=7.81\times 10^{-1}\times 0.480 atm$

$p_{N_2}=0.375atm$

Now we have to calculate the solubility of nitrogen in water.

Formula used :

$s_{N_2}=p_{N_2}\times K_H$

where,

$p_{N_2}$ = partial pressure of nitrogen = 0.375 atm

$s_{N_2}$ = solubility of nitrogen in water = ?

$K_H$ = Henry's constant = $6.70\times 10^{-4}mole/L.atm$

Now put all the given values in the above formula, we get :

$s_{N_2}=0.375atm\times 6.70\times 10^{-4}mole/L.atm$

$s_{N_2}=2.5125\times 10^{-4}mole/L$

Therefore, the solubility of nitrogen in water at an atmospheric pressure will be, $2.5125\times 10^{-4}mole/L$

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3 years ago

The molar concentrations for the reactants and products at equilibrium are found to be [HCl]=0.80 M, [O2]=0.20 M, [Cl2]=3.0 M, a

olga nikolaevna [1]

Answer:

$\large \boxed{990}$

Explanation:

4HCl + O₂ ⇌ 2Cl₂ + 2H₂O

E/mol·L⁻¹: 0.80 0.20 3.0 3.0

$K_{\text{eq}} = \dfrac{\text{[Cl$_{2}$]$^{2}$[H$_{2}$O]$^{2}$}}{\text{[HCl]$^{4}$[O$_{2}$]}} = \dfrac{3.0^{2}\times3.0^{2}}{0.80^{4}\times 0.20} = \mathbf{990}\\\\\text{The $K_{\text{eq}}$ value is $\large \boxed{\mathbf{990}}$}$

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