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3 years ago

According to the following electron structure, how many valence electrons do these fluorine have?

2 answers:

5 0

Valence electron/s - it's electron/s located in outer shell of an atom.

Fluorin have 7 valence electrons located in 2 shell.
2s² 2p⁵

eimsori [14]3 years ago

5 0

Answer : Fluorine has Seven valence electrons.

Explanation :

Element = Fluorine

Atomic number = 9

Number of electrons = 9

Electronic configuration = $1s^22s^22p^5$

Electron structure is also known as electronic configuration. It is defined as the arrangement of electrons of an atom in an atomic orbitals.

According to Electron configuration, the 2s and 2p are the outermost energy shell and the number of electrons in 2s and 2p are 2 & 5 respectively. That means Fluorine has '7' valence electrons.

The electron structure of fluorine is shown below.

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How many formula units of silver fluoride, AgF, are equal to 42.15 g of this substance?

4vir4ik [10]

2.05 × 10²³ formula units

Given data:Mass of AgF = 43.15 gNumber of formula units = ?Solution:Number of moles of AgF:Number of moles = mass/ molar massNumber of moles = 43.15 g/ 126.87 g/molNumber of moles = 0.34 molNow Number of formula units will be determine by using Avogadro number.It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.The number 6.022 × 10²³ is called Avogadro number1 mole = 6.022 × 10²³ formula units0.34 mol × 6.022 × 10²³ formula units2.05 × 10²³ formula units

3 0

2 years ago

What is the main difference in covalent bonds in diatomic chlorine and diatomic oxygen? diatomic means two atoms of the same typ

Aneli [31]

The correct response is C. Chlorine forms 1 covalent bond while Oxygen forms 2 covalent bonds.

3 0

3 years ago

Convert 3.9x10^5mg to dg

bonufazy [111]

Thank you for posting your math problem here. To convert 3.9x10^5mg to dg the answer is 3.9 x 10^3 dg. Below is the solution:

Solution:

1mg=0.01dg
 dg= 3.9 X 10^5mg
dg = (3.9 X 10^5) x 0.01
dg = 3.9 x 10^3

7 0

2 years ago

Read 2 more answers

In water, Vanillin, C8H8O3, has a solubility of 0.070 moles of vanillin per liter of solution at 25C. What will be produced if 5

Rufina [12.5K]

Answer:

The full amount (5.00 g) will be dissolved in 1 L of water at 25°C.

Explanation:

The molecular weight (MW) of Vanillin (C₈H₈O₃) is calculated from the chemical formula as follows:

MW(C₈H₈O₃) = (12 g/mol x 8) + (1 g/mol x 8) + (16 g/mol x 3) = 152 g/mol

If 0.070 mol of C₈H₈O₃ are soluble per liter of water at 25°C, the maximum mass that can be dissolved in 1 L is:

0.070 mol x 152 g/mol = 10.64 g

Since 5.00 g is lesser than the maximum amount that can be dissolved (10.64 g), the added amount will be completely dissolved in 1 L of water at 25°C.

7 0

2 years ago

In a sample containing a mixture of only these gases at exactly one atmosphere pressure, the partial pressures of carbon dioxide

Black_prince [1.1K]

Answer:

Explanation:

The pressure of a gaseous mixture is equal to the sum of the partial pressures of the individual gases:

Σ $P_g_a_s$ $= P_1+P_2+P_3+...+P_n$

The prompt is trying to confuse you, but it actually tells us the pressure of the mixture to be 1 atm, but this can be converted to torr. Furthermore, we are informed only three gases are in the mixture: diatomic nitrogen, diatomic oxygen, and carbon dioxide:

$P_g_a_s=1 \ atm = 760 \ torr= P_N_2+P_O_2+P_C_O_2\\760 \ torr = 582.008 \ torr + P_O_2 \ + 0.285 \ torr$

Solve for Po2:

$P_o_2=(760-582.008-0.285) \ torr = 177.707 \ torr$

Thus, the partial pressure of diatomic oxygen is 177.707 torr.

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4 0

2 years ago