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3 years ago

Which ion is formed when an atom of fluorine (F) gains one electron?

Chemistry

2 answers:

dybincka [34]3 years ago

8 0

The answer is F-1since it is gaining therefore you can take this as electron affinity.

Viktor [21]3 years ago

6 0

Answer: Option (a) is the correct answer.

Explanation:

When an atom or element gains an electron then the atom acquires a negative charge whereas when an atom or element loses an electron then it acquires a positive charge.

for example, atomic number of fluorine is 9 and when it gains one electron then fluorine atom acquires a negative charge. Hence, neutral atom of fluorine changes into $F^{-1}$ ion.

Thus, we can conclude that $F^{-1}$ ion is formed when an atom of fluorine (F) gains one electron.

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Balance using the redox method:

sweet [91]

Choose all options that apply. Which of the following are equal to 20%? | a) .25 b) 1/5 Oc) 1/10 d) .20

6 0

3 years ago

Radiation with a wavelength of 4.2nm

viva [34]

The answer is X Ray

Hope it helps

6 0

3 years ago

The instruction booklet for your pressure cooker indicates that its highest setting is 11.8 psipsi . You know that standard atmo

zavuch27 [327]

<u>Answer:</u> The temperature at which the food will cook is 219.14°C

<u>Explanation:</u>

To calculate the final temperature of the system, we use the equation given by Gay-Lussac Law. This law states that pressure of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{P_1}{T_1}=\frac{P_2}{T_2}$

where,

$P_1\text{ and }T_1$ are the initial pressure and temperature of the gas.

$P_2\text{ and }T_2$ are the final pressure and temperature of the gas.

We are given:

$P_1=14.7psi\\T_1=273K\\P_2=(14.7+11.8)psi=26.5psi\\T_2=?$

Putting values in above equation, we get:

$\frac{14.7psi}{273K}=\frac{26.5psi}{T_2}\\\\T_2=\frac{26.5\times 273}{14.7}=492.14K$

Converting the temperature from kelvins to degree Celsius, by using the conversion factor:

$T(K)=T(^oC)+273$

$492.14=T(^oC)+273\\\\T(^oC)=219.14^oC$

Hence, the temperature at which the food will cook is 219.14°C

7 0

3 years ago

In order to derive a simplified version of the Nernst equation by assuming standard temperature we can substitute which of the f

Nikitich [7]

Answer:

c. 298 K

Explanation:

Nernst equation is an equation used in electrochemistry that relates the reduction potential of a reaction with the standard potential, temperature and concentrations of the reactants in that are been reducted and oxidized. The formula is:

E = E° - RT / nF ln [Red] / [Ox]

<em>Where R is gas constant (8.314J/molK), T is absolute temperature (In Kelvin), n are moles of electrons and F is faraday constant (K/Volt*mol)</em>

<em />

In electrochemistry, standard temperature is taken as 298K. That means by assuming standard temperature we can substitute T as:

5 0

4 years ago

A chemical reaction produces 653 550 kj of energy as heat in 142.3min. calculate the rate of energy transferred in kj per minute

miskamm [114]

We have the value of

Total energy produced in the chemical reaction=653 550 KJ

Time needed=142.3min

To calculate the rate of energy transfer, that is the amount of energy produced per minute.

Rate of energy transfer= $\frac{Total energy produced}{Time needed}$

= $\frac{653 550}{142.3}$

=4592.76 KJ min⁻¹

So, the rate of energy transfer is 4592.76 KJ min⁻¹.

6 0

3 years ago