Balance this chemical equation pleaseee

Answers

Answer 1

Answer: Pb(NO3)2 + 2NaCl > 2NaNO3 + PbCl2

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An atom in an excited state has an electron configuration of 2-7-2. Explain in terms of subatomic particles, why the excited atom described is electrically neutral.

Answers

The excited atom can be described as electrically neutral because from its electron configuration ;

The number of electrons ( 11 ) = Number of protons ( 11 )

From the electron configuration 2-7-2 the number of electrons equals ( 2 + 7 + 2 ) = 11 electrons, also the number of protons will be = 11 for the atom to be neutral. While the number of Neutron is not significant in the positivity or negativity of atoms.

The subatomic particles contained in an atom are protons, neutrons and electrons ( which are present in the outer most shell ) and represents the electron configuration of an atom. while the number of neutrons is determined by the Isotope.

Hence we can conclude that The excited atom can be described as electrically neutral because from its electron configuration ; The number of electrons = Number of protons .

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Answer:

Number of electrons: 11

Number of protons: 11

Number of neutrons : not enough information.

Explanation:

an atom contains sub atomic particles electrons, protons and neutrons.

Electrons are present in the outer shells.

The given atom contains eleven electrons.

The atom is neutral so the number of electrons will be equal to number of protons. The number of protons will be 11.

The number of neutrons will depend upon the type of isotope.

Is Squeezing oranges to make orange juice a chemical or physical change?

Answers

This would be a physical change because despite the fact the juice has been squeezed out of it, the orange is still an orange. A physical change is when something changes matter, like a solid to a liquid or a liquid to a gas. Since it's been changed from a solid orange to liquid juice, it's a physical change.

Hope I helped! :)

squeezing just the juices out of the orange, like with your hand or whatever you use, is a physical change. yes :)

The production of water proceeds according to the following equation.2H2(g) + O2(g) → 2H2O(g)

Which describes a way to speed up the collisions between hydrogen and oxygen molecules to produce more water?

a. Use a less-intense source of heat on the reactants.
b. Maintain the same temperature of the reactants.
c. Place the reactants in a smaller container.
d. Reduce the concentration of the reactants.

Answers

The production of water proceeds according to the following equation. 2H2(g) + O2(g) → 2H2O(g). Which describes a way to speed up the collisions between hydrogen and oxygen molecules to produce more water?

Answer: Out of all the options shown above the one that best describes a way to speed up the collisions between hydrogen and oxygen molecules to produce water is answer choice C) Place the reactants in a smaller container.

I hope it helps, Regards.

Answer: C place the reactants in a smaller container

Explanation: took the quiz

What is a chemical entity that forms a complex ion around a central atom?

Answers

A coordination complex consists of a central atom or Jon, which usually metallic and is called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligand or complexing agents

The substance which is dissolved in a solution is called:solvent
colloids
solute
precipitant

Answers

Answer: The substance which is dissolved in a solution is called solute.

Explanation:

Solution is made up two parts:

1) Solute : The substance which is dissolves in a solvent to give a solution.

It is always present in less amount.

2) Solvent : The liquid substance in which solute is dissolved is known as solvent.

It is always present in large amount.

Solution = Solute + Solvent

For example : Salt as solute and water as solvent in salt solution.

The substance that is dissolved in water is called a solute.

Hope this helps~

A new scam on the Internet involves people selling samples of sodium that they collected from a secret river in the mountains. Write a short statement to explain why this is a scam.

Answers

Sodium is a very highly reactive metal that does not occur in free state in nature.

Sodium is a group 1 element. It has a very negative electrode potential which implies that it is highly reactive. Being a highly reactive element, sodium can not occur in free state in nature. It always occurs in combined form as compounds.

Hence, it is impossible to pick up sodium from any secret river in the mountains. Sodium metal is highly reactive hence it has to be stored under paraffin oil. The whole set up is indeed a scam.

Learn more: brainly.com/question/2673886

Answer:

Explanation:

The reason this is a scam is because they are selling sodium and to sell this product you must have a licence to do so. And secondly, you cant tell the reader that it is from a secret river and sell them a product that reacts when it touches water.

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