Which combination of elements below will bond ionically and in the same

¿Por qué los mensajes llegan en forma inmediata de un celular a otro?

KATRIN_1 [288]

Porque el internet ayuda a la rapidez del mensaje.

7 0

4 years ago

A train 4.00 3 102 m long is moving on a straight track with a speed of 82.4 km/h. The engineer applies the brakes at a crossing

zysi [14]

Answer:

The value is $t =29.2 \ s$

Explanation:

From the question we are told that

Generally the average velocity of the train is mathematically represented as

$v = \frac{u + v}{2}$

substituting 82.4 km/h for u and 16.4 km/h. for v

$v = \frac{82.4 + 16.4}{2}$

$v = 49.4 \ km/h$

Generally the time taken is mathematically represented as

$t = \frac{ L}{v}$

substituting 49.4 \ km/h for v and $4.00 * 10^2 \ m = 0.400 \ km$

$t = \frac{ 0.400}{49.4}$

$t = 0.00809 \ h$

converting to seconds

$t = 0.00809 * 3600$

$t =29.2 \ s$

7 0

3 years ago

The shoe is in contact with the initially nearly stationary 0.500 kg football for 20.0 ms. What average force is exerted on the

Olin [163]

If v=22m/s after0.02s then acceleration was
22/0.02=1100m/s^2
Now, F=ma=(0.5)(1100)=550N

4 0

3 years ago

Read 2 more answers

what is the frequency of the photon emitted by a hydrogen atom when its electron drops from the n = 6 to n = 4 energy level?

Gemiola [76]

The frequency of the photon emitted by a hydrogen atom is $26.2*10^-^4 hz$

<h3>What are Photons?</h3>

A particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass.

In the case of light, the frequency, symbolized by the Greek letter nu (ν), of any wave equals the speed of light, c, divided by the wavelength λ:

v = c/λ

Since the wavelength λ is in the bottom of the fraction, the frequency is inversely proportional to the wavelength.

v = c/λ

v= $\frac{3*10^8}{434*10^-^9} = 6.91*10^1^4 Hz$

By using Rydberg's formula,

1/λ $= Rz^2(\frac{1}{n_1^2} - \frac{1}{n_2^2})$

1/λ = $109677 *(\frac{1}{4^2} - \frac{1}{6^2}) = 3808.22 cm^-^1$

λ = $26.2*10^-^4 hz$

$26.2*10^-^4 hz$ is frequency of the photon emitted by a hydrogen atom.

Learn more about Photons here:brainly.com/question/20912241

#SPJ1

4 0

2 years ago

What do the single electrons in nitrogen do for a triple bond?

kirza4 [7]

Nitrogen could form 3 bonds based on octet rule, because it has 5 valence electrons. That means it needs 3 bonds.

Explanation:

A nitrogen atom can fill its octet by sharing three electrons with another nitrogen atom, forming three covalent bonds, a so-called triple bond.
A triple bond isn't quite three times as strong as a single bond, but it's a very strong bond.
Every covalent bond is a sharing of two electrons between two atoms. A double bond is 4 electrons being shared (2x2). Therefore a triple bond is 6 electrons being shared (2x3)
Triple bonds are stronger than double bonds due to the the presence of two pi bonds rather than one.
Each carbon has two sp hybrid orbitals, and one of them overlaps with its corresponding one from the other carbon atom to form an sp-sp sigma bond.
A single lone pair can be found with atoms in the nitrogen such as nitrogen in ammonia , two lone pairs can be found with atoms in the chalogen group such as oxygen in water and the halogen can carry three lone pairs such as in hydrogen chloride. Nitrogen has 2 lone pairs.

6 0

4 years ago