When 11.12 g of neon is combined in a 100 L container at 80oC with 9.59 g of argon, what is the mole fraction of argon?

Answers

Answer 1

Answer: The correct answer for the question that is being presented above is this one: "0.3."

Here it is how to solve.
Molecular mass of Ar = 40
Molecular mass of Ne = 20
Number of moles of Ar = 9.59/40 = 0.239
Number of moles of Ne = 11.12/20= 0.556
Mole fraction of argon = 0.239/ ( 0.239 + 0.556) = 0.3

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If a solution is made by mixing 50.0 moles of KOH to 3.4 kilograms of water then what is the solutions molality?

Answers

The molality of a solution is calculated by taking the moles of solute and dividing by the kilograms of solvent.

Which of the following statements explains the difference between a lease and a loan?a. At the end of a loan the car belongs to you, but at the end of a lease, the car still belongs to the
lease company
b. At the end of a loan, the car still belongs to the lease company, but at the end of a lease the car
belongs to you.
c. A loan requires a large down payment at the beginning while a lease does not.
d. A lease requires a large down payment at the beginning while a loan does not.
Please select the best answer from the choices provided

Answers

Answer:

letter A is the answer

Explanation:

At the end of a loan the car belongs to you, but at the end of a lease, the car still belongs to the lease company.

An electron in an atom moves from the ground state to an excited state when the energy of the electron(1) decreases
(2) increases
(3) remains the same

Answers

The answer is (2) increases. The definition of excited state is that the electrons have higher energy than ground state. For comprehension, the excited state is ready for reaction so it has higher energy.

An electron in an atom moves from a ground state to an excited state when the electron energy increases

Further Explanation

Excitation in physics is the addition of a number of discrete energies (called excitation energies) to a system — such as the nucleus of an atom, atom, or molecule — so as to produce a change, usually from the lowest energy state (ground state) to one of the higher energies (excited state).

In nuclear, atomic and molecular systems, excited states do not continue to be distributed but instead have certain discrete energy values. Thus, external energy (excitation energy) can be absorbed in discrete quantities.

Excitation energy is stored in excited atoms and the nucleus that emits light is usually seen from atoms and as gamma radiation from the nucleus because they return to the ground state. This energy can also be lost by collisions.

In the nucleus, energy is absorbed by protons and neutrons which are transferred to an excited state. Within a molecule, energy is absorbed not only by electrons, which are very enthusiastic for higher energy levels but also by whole molecules, which are highly excited for the discrete states of vibration and rotation.

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Electron moves brainly.com/question/496960

Excitation brainly.com/question/496960

Details

Class: High School

Subject: Chemistry

Keywords: electron, excitation, energies

What are superconductors?a. Materials that need high heat to transfer energy
c. Materials that only transfer thermal energy
b. Materials that transfer energy with no resistance
d. Materials that convert thermal energy into potential energy User: ______ is/are usually the best conductor/s.
a. Metals
c. Air
b. Water
d. Minerals

Answers

Superconductors are materials that transfer energy with no resistance. Metals are usually the best conductors.

Superconductivity is a phenomenon characterized by zero electrical resistance at below critical temperatures. Metals are the best conductors because the molecules inside them are tightly packed, which allows electricity to travel efficiently.

Water is also a good conductor because of the ions and minerals in it. However, water itself is not a conductor of electricity.

The answer would be B

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The standard on which the atomic mass unit is based is the mass of a (1 point)proton. neutron. chlorine-35 atom. carbon-12 atom.

Answers

D. carbon-12 atom I hope this helps :)

Carbon-12 Atom is correct :)

How would you prepare 3.5 L of a 0.9M solution of KCl?

Answers

Calculate the mass of the solute in the solution :

Molar mass KCl = 74.55 g/mol

m = Molarity * molar mass * volume

m = 0.9 * 74.55 * 3.5

m = 234.8325 g

To prepare 0.9 M KCl solution, weigh 234.8325 g of salt in an analytical balance, dissolve in a beaker, shortly after transfer with the help of a funnel of transfer to a volumetric flask of 100 cm³ and complete with water up to the mark, then cover the balloon and finally shake the solution to mix

hope this helps!

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