CHEMISTRY HIGH SCHOOL

What kind of molecule can experience hydrogen bonding

Answers

Answer 1

Answer: A molecule with hydrogen bonded to O, N, or F.

Answer 2

Answer:

Answer:

A molecule with hydrogen bonded to to O, N, or F

Explanation:

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Which of the following types of radiation can be shielded by piece of paper or fabric

Answers

There are 3 major types of radiation. The Alpha, Beta and Gamma radiation. It is the Alpha radiation that can be stopped by a piece of paper or fabric. Beta on the other hand can be stopped by plastic or a thin sheet of metal and Gamma by a piece of aluminum foil or lead.

An ion is an atom ____.

Answers

It is an atom CHARGED.
I hope I helped! =D

Which of the following processes would you predict to have an increase in entropy?condensation of water

freezing water

melting ice

deposition of CO2 (changing from a gas to solid)

Answers

Among the choices given, the best answer is the third option. Melting ice shows an increase in entropy. Entropy is the degree of disorderliness in a system. Among the phases, solid has the most ordered structure which means it has the least entropy. The ice melting shows a phase change from solid to liquid. Liquid molecules are more disorganized than the solid thus there is an increase in entropy.

Answer: melting ice

Explanation:

Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

1. condensation of water : Condensation process is a process where gaseous state changes to liquid state., thus decreasing randomness and decreasing entropy.

2. Freezing water : Freezing process is a process where liquid state changes to solid state, thus decreasing randomness and decreasing entropy.

3. melting ice: Fusion process is a process where solid state changes to liquid state, thus increasing randomness and increasing entropy.

4. deposition of $CO_2$ : deposition process where gaseous state changes to solid state by escaping liquid state, thus decreasing randomness and decreasing entropy.

Put these events in order.= Your phone contacts a base station in a cell.
= Once connected, a duplex system allows you to talk to the other person at the same time.
= You dial a number on your cell phone.
The MTSO then connects you to the other device.
= A base station contacts the Mobile Telephone Switching Office (MTSO).

Answers

Answer:

You dial a number on your phone

Your phone contacts a base station

The base station contacts the MTSO

The MTSO connects you to the other device

You talk to the person on the other device.

What is the energy needed to raise an electron in the hydrogen atom from the second energy level to the third energy level ?a.) 1.52x10^4 J b.) 3.63*10^-19 J c.) 2.18x10^-19 J d.) 4.48x10^-9 J e.) 3.03*10^-19J

Answers

$3.03*10^-19J$ is the energy needed to raise an electron in the hydrogen atom from the second energy level to the third energy level.

What are Energy Levels?

The electrons that surround an atom around the nucleus are located in regions called "energy levels". It represents the 3-D space that surrounds the nucleus where the electrons are present. It is divided into several energy levels such as first energy level, second energy level and so on.

The level that is closest to the nucleus is the first energy level, then the second one is further away from it, then the third one is a little further away and so on. Each energy level has different number of electrons like first has 2 electrons, second has 8, third has 8 and so on. The electrons which are further away from the nucleus are called valence electrons.

For given above information,

E = - $E_o$ / $n^2$

where,

$E_o$ = 13.6 eV (1 eV = 1.602×10-19 Joules) and n = 1,2,3… and so on so that the ground state has energy $E_1$ = -13.6 eV and the second energy level (the first excited state) has energy $E_2$ = -13.6/4 eV = -3.4 eV.