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3 years ago

How many valence electrons does fluorine have?

Chemistry

2 answers:

aalyn [17]3 years ago

4 0

Answer:

Fluorine (F) has 7 valence electrons.

Explanation:

Fluorine (F) has 7 valence electrons. Fluorine belongs to group 7 in the periodic table. Group 7 elements are known as halogens. Fluorine is halogen and is the most electronegative element among the halogens. As Fluorine (F) has 7 valence electrons it has a tendency to accept another electron and complete an octet (8 electrons). Fluorine (F) forms a fluoride ion (anion) by accepting one more electron in its valence shell.

ahrayia [7]3 years ago

3 0

Seven valence electrons .

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Ted likes to run long distances. He can run 20 km 20 km20, start text, space, k, m, end text in 95 9595 minutes. He wants to kno

balu736 [363]

Answer:

The distance in kilometer that Ted will go if he runs at the same pace for 285 minutes is 60km

Step-by-step explanation:

It was given that Ted Ted runs 20 km in 95 minutes, so for us to know how many kilometers he runs at the same pace for 285 minutes by using proportion.

For Ted to run 20 km in 95 minutes.

$Speed=Distance/Time$

where given distance= 20km

Given time =95minutes

Speed=20/95 .............eqn(1)

To calculate the distance in kilometers Ted will go if he runs at the same pace for 285 minutes, then

Speed= K/225 ...............eqn(2)

Let us represent distance with 'K'

Given time 225minutes

Equating eqn(1) and eqn(2)

Hence the proportion model that Ted could use in modelling this situation is this;

$20/95=K/225$

Cross multiply

K×95=20×225

$K=60$

The distance in kilometer that Ted will go if

he runs at the same pace for 285 minutes is 60km

3 0

4 years ago

Combustion of hydrocarbons such as propane ( C3H8 ) produces carbon dioxide, a "greenhouse gas." Greenhouse gases in the Earth's

Naddika [18.5K]

Answer:

1. C₃H₈(g) + 5O₂ (g) → 3CO₂ (g) + 4H₂O (g)

2. The volume of CO₂ produced is 238 l.

Explanation:

Hi there!

The chemical equation is the following:

C₃H₈(g) + 5O₂ (g) → 3CO₂ (g) + 4H₂O (g)

The molar mass of propane is calculated as follows:

mass of 1 mol carbon = 12 g

mass of 1 mol hydrogen = 1 g

mass of 1 mol propane 3 · (12 g) + 8 · (1 g) = 44 g

If we have 150 g of propane, we will have (150 g · 1 mol / 44 g) 3.4 mol propane.

Looking at the chemical equation, notice that 1 mol propane produces 3 mol CO₂. Then 3.4 mol of propane will produce:

(3.4 mol C₃H₈ · 3 mol CO₂ / mol C₃H₈ ) 10.2 mol CO₂

Using the Ideal Gas Law we can obtain the volume of CO₂ produced:

P · V = n · R · T

Where:

P = pressure.

V = volume

n = number of moles.

R = gas constant (0.082 atm · l / ( K · mol))

T = temperature in kelvin.

V = n · R · T / P

V = 10.2 mol · 0.082 atm · l/ (K mol) · 285 K / 1 atm

Notice that 12 °C = 273 + 12 = 285 K

V = 238 l

The volume of CO₂ produced is 238 l.

Have a nice day!

7 0

4 years ago

HELP ASAP Choose three sections of the electromagnetic spectrum. Rank them in order of energy. Give an example of how they are u

hodyreva [135]

Isn’t Bambi undo hall

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3 years ago

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denpristay [2]

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5 0

3 years ago

When KCl dissolves in water:

34kurt

This dissociation occur because:

O had to bond with H due to the Hydrogen bonding rule, which will form OH~ (Hydroxide).

K is more attracted to Hydroxide than Cl, so it will depart Cl and bond with OH~.

that leaves a H and a Cl, which one has a positive charge and the other has a negative, so they will bond and form Hydrochloric Acid.

3 0

3 years ago