Fluorine has 7 valence electrons. How many more electrons does it need to acheive a full outermost energy levela
1
3
Ob
Oc
O d
10
2

Answers

Answer 1

Answer: One, because of the octet rule, every element wants to be like the noble gases, have a full shell, which is 8 electrons.

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Is there a relationship between an elements atomic number and its first ionization energy (IE)?

Answers

yes, well kind of, as you travel across the a period the first ionization energy increases). as you travel down a column the ionization energy decreases.

A specific amount of energy is emitted when excited electrons in an atom in a sample of an element return to the ground state.This emitted energy can be used to determine theA) mass of the sample
B) volume of the sample
C) identity of the element
D) number of moles of the element

Answers

The answer is C. The specific amount of energy emitted when electrons jump from excited states to the ground state refers to emission spectrum. The energy is emitted in the form of photons, and the photons have very specific wavelengths (energy) that correspond to the energy gaps between the excited states and the ground state. The specific wavelengths of light emitted are referred to as the "emission spectrum," and each element produces a different emission spectrum. Thus, this emitted energy can be used to identify the element from which your sample was taken.

Answer:

Explanation:

During a flame test, ions of a specific metal are heated in the flame of agas burner. A characteristic color of light is emitted by these ions inthe flame when the electrons(1) gain energy as they return to lower energy levels(2) gain energy as they move to higher energy levels(3) emit energy as they return to lower energy levels(4) emit energy as they move to higher energy levels

Answers

The flames being emitted by the ions are as a result of ions 3. emitting energy as they return to lower energy levels.

When ions are heated:

They absorb energy
They are able to move around

As they move around, they expend some of that energy and lose it as a result thereby returning to lower energy levels. As that energy is lost, it comes across as light being emitted by the ions.

In conclusion, ions in the flame test emit light as they lose energy and return to a lower energy level.

Find out more at brainly.com/question/6357832.

Answer;

-Emit energy as they return to lower energy levels.

Explanation;

-A characteristic color of light is emitted by these ions in the flame when the electrons emit energy as they return to lower energy levels.

-The metal ions do absorb energy, and the electrons are boosted to higher energy levels, but they emit that energy as they fall to lower levels, and it is the photons of light they are emitting that can be seen.

A 0.0489 mol sample of a nutrient substance, with a formula weight of 114 g/mol, is burned in a bomb calorimeter containing 6.56 × 10² g h2o. given that the fuel value is 2.04 × 10⁻¹ in nutritional cal when the temperature of the water is increased by 1.73°c, calculate the fuel value in kj.

Answers

To calculate the fuel value in kJ, we need to convert the nutritional calories to kilojoules.

1 nutritional calorie (cal) = 4.184 kilojoules (kJ)

First, let's calculate the energy released by burning the 0.0489 mol sample of the nutrient substance in calories:

Energy released = moles of nutrient substance * formula weight * fuel value

Energy released = 0.0489 mol * 114 g/mol * 2.04 × 10⁻¹ cal

Next, let's convert the energy released from calories to kilojoules:

Energy released (kJ) = Energy released (cal) * 4.184 kJ/cal

Now, let's substitute the given values into the equations:

Energy released = 0.0489 mol * 114 g/mol * 2.04 × 10⁻¹ cal
Energy released ≈ 0.11185 cal

Energy released (kJ) = 0.11185 cal * 4.184 kJ/cal
Energy released (kJ) ≈ 0.467 kJ

Therefore, the fuel value of the nutrient substance is approximately 0.467 kJ.

Final answer:

To calculate the fuel value in kJ, convert nutritional calories to joules and then to kilojoules.

Explanation:

To calculate the fuel value in kJ, we need to convert the nutritional calories to joules and then to kilojoules. We can use the equation: fuel value (in kJ) = fuel value (in cal) x 4.184 / 1000. Given that the fuel value is 2.04 × 10⁻¹ nutritional cal, we can substitute it into the equation to get the fuel value in kJ.

fuel value (in kJ) = 2.04 × 10⁻¹ x 4.184 / 1000 =8.5288 x 10⁻³ kJ

Learn more about Fuel value here:

brainly.com/question/32379162

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Technician A says that a leaking head gasket can be tested for by using a chemical tester. Technician B says that a leaking head gasket can be found using an exhaust gas analyzer. Who is correct?

Answers

Answer: Both technicians are correct

Explanation: A chemical tester and exhaust gas analyzer are two important ways to check for gasket leakage

How many milliliters of 0.183 m hcl would be required to titrate 5.93 g koh?

Answers

Molar mass:
KOH = 56.0 g/mol

Number of moles of KOH :

5.93 / 36.5 => 0.1624 moles

KOH + HCl = KCl + H₂O

1 mole KOH --------------> 1 mole HCl
0.1624 moles KOH ----> ?

moles HCl = 0.1624 x 1 / 1

= 0.1624 moles of HCl

V ( HCl ) = moles / molarity

V(HCl) = 0.1624 / 0.183

V (HCl) = 0.887 L x 1000 = 887 mL

hope this helps!

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