The maximum energy available for useful work from a spontaneous reaction

The IE1, for iodine, is 1009 kJ/mol. Calculate the wavelength (in nm) of electromagnetic energy need to ionize an iodine atom. 1

egoroff_w [7]

Answer:

118.6nm

Explanation:

It is possible to calculate wavelength of any energetic process (As an ionization) using:

E = hc / λ <em>(1)</em>

<em>Where E is Energy, h is Planck constant (6.626x10⁻³⁴Js), c speed of light (3x10⁸ms⁻¹) and λ is wavelength In meters.</em>

As the energy to ionize 1 mole of iodine is 1009kJ, one atom requires:

(1009kJ / mol) ₓ (1mol / 6.022x10²³ atoms) = <em>1.6755x10⁻²¹kJ / atom</em>. = 1.6755x10⁻¹⁸J

Replacing in (1):

λ = hc / E

λ = 6.626x10⁻³⁴Js*3x10⁸ms⁻¹ / 1.6755x10⁻¹⁸J

λ = 1.186x10⁻⁷m

As 1m = 1x10⁹nm:

1.186x10⁻⁷m ₓ (1x10⁹nm / 1m) =

4 0

3 years ago

The involuntary muscles of the arteries are controlled by the_________ system. respiratory,skeletal,nervous,circulaory

Soloha48 [4]

The involuntary muscles of the arteries are controlled by the nervous system. The correct option among all the options that are given in the question is the third option or the penultimate option. these muscles are not directly under the control of any person and so are called involuntary muscles. I hope the answer helps you.

3 0

3 years ago

Ppredict the identity of the precipitate in the below reaction:<br><br> BaCl2(aq) + K2SO4(aq) →

Annette [7]

Answer: The precipitate formed is $BaSO_4$

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid or precipitated form are represented by (s) after their chemical formulas.

A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.

The balanced chemical equation is:

$K_2SO_4(aq)+BaCl_2(aq)\rightarrow BaSO_4(s)+2KCl(aq)$

3 0

3 years ago

I need to know the answer to this question ?‍♀️

Nat2105 [25]

This is the pattern formed in a fluid when heating causes part of the fluid to rise and then cooling causes it to sink again. Within Earth's mantle they circulate heat and drive plate tectonic processes. Within the atmosphere and oceans, they drive winds and weather patterns:Convection Cell

8 0

4 years ago

Identify the neutralization reaction.

dusya [7]

The neutralization reaction among all the reactions would be the one between an acid and a base to produce salt and water.

<h3>What is a neutralization reaction?</h3>

It is a reaction involving an acid and a base to produce salt and water.

From the list of reactions, the only reaction that involves acid and a base with salt and water being the products is the first reaction.

Thus, the neutralization reaction is represented by the equation:

$2H_3PO_4 + 3Ba(OH)_2 --- > 6H_2O + Ba(PO_4)_2$

More on neutralization reactions can be found here: brainly.com/question/20038776

#SPJ1

4 0

2 years ago