Where is the atmosphere the most dense?

Answers

Answer 1
Answer: I think the troposphere

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An acid-base indicator is used in what type of reaction? A. neutralization B. combination C. decomposition D. combustion

Answers

An acid base reaction is a netutralization reaction which produces water and salt. It is not a decomposition since the reactants are not broken to simpler elements nor combustion since it does not uses oxygen as reactant.

Answer: Neutralization Reaction

Explanation: Acid-Base Indicator are the substances which are responsible for the observance of the color change in the titration mixture due to the change in pH at the end point.

Acid -Base reactions are those in which acid and base reacts to get neutralized and formation of the salt takes place.

When the amount of acid becomes equal to the amount of base, end point is reached where the color of the solution changes.

This reaction is neither a decomposition reaction as the reactant is not getting decomposed into simpler elements  nor a combustion reaction as it is not taking place in presence of oxygen . It can be a part of combination reaction but it is more primarily known as Neutralization reaction.

A gas is heated from 298 K to 367 K while its volume changes from 2.5 L to 3.9 L. If the initial pressure of the gas is 1.1 atm, what is the final pressure of the gas?

Answers

PV=nRT, .85atm
If the volume goes up, the pressure goes down.

Answer:

0.87

Explanation:

Which statement about one atom of an element identifies the element?(1) The atom has 1 proton. (2) The atom has 2 neutrons.(3) The sum of the number of protons and neutrons in the atom is 3.(4) The difference between the number of neutrons and protons in the atom is 1.

Answers

the atom has one proton 

When writing an electron configuration for a transition metal, what is the last orbital type to be filled – an s, p, d or f orbital?

Answers

It would be d.

Reason being said...

the electron configuration normally goes like this...

1s2 2s2 2p6 3s2 3p6 4s2....

until you hit the transition metals..remember those have a special rule..

even though you are in the 4 sublevels for the orbitals ... it goes down 1

Making it 3d..(1,2,3,4,5,6,7,8,9,10)

Going on...

at 5s2 then, 4d1, 4d2, 4d3, 4d4, etc..

at 6s2 then, 5d1, 6d2, 6d3, 6d4, etc..

Thus, D orbital is your answer.

Please answer me ASAPA technique that uses a porous barrier (separation with pores) to separate heterogeneous mixtures is _______.


a. distillation

b. chromatography

c. filtration

d. crystallization

Answers

Answer:

c.filtration is the answer

What is the difference between conductors and insulators

Answers

Explanation:

Conductors and insulators are two types of materials that differ in their ability to conduct electrical current. Here are the key differences between conductors and insulators:

**Conductors:**

1. **Electrical Conductivity:** Conductors are materials that have high electrical conductivity. This means they allow the easy flow of electric charge, typically in the form of electrons. Metals like copper, aluminum, and silver are excellent electrical conductors.

2. **Free Electrons:** Conductors have a large number of free electrons that are loosely bound to their atomic structure. These free electrons can move easily when a voltage is applied, creating an electric current.

3. **Low Resistance:** Conductors have low electrical resistance, which means they offer little opposition to the flow of electric current.

4. **Used for Wiring:** Conductors are commonly used in electrical wiring and circuits to transmit electricity efficiently.

**Insulators:**

1. **Electrical Insulation:** Insulators are materials that have low electrical conductivity. They do not allow the easy flow of electric charge. Examples of insulators include rubber, glass, plastic, and wood.

2. **Tightly Bound Electrons:** Insulators have tightly bound electrons in their atomic structure. These electrons are not free to move, so they do not contribute to the flow of electric current.

3. **High Resistance:** Insulators have high electrical resistance, which means they strongly resist the flow of electric current.

4. **Used for Insulation:** Insulators are used to isolate and protect conductors in electrical systems. They are employed as insulating materials in wires, cables, and electrical devices to prevent electrical leakage and ensure safety.

In summary, conductors allow electric current to flow easily due to the presence of free electrons and low resistance, while insulators inhibit the flow of electric current because their tightly bound electrons and high resistance prevent the movement of charge. These differences make conductors suitable for carrying electricity, while insulators are used to insulate and protect conductive materials in electrical systems.