All categories

4 years ago

Which atom would be expected to have a half-filled 4s subshell?

1 answer:

6 0

The atom 2 which would be expected to have a half filled 4s subshell is the potassium atom. Potassium has a electronic configuration 1s2 2s2 2p6 3s2 3p6 4s1 or (Ar) 4s1. The 4S1 subshell is half filled since the s orbital accommodate 2 electron pair to be fully filled.

You might be interested in

Figure 1 shows a seaside cliff. Figure 2 shows the same cliff after a period of time has passed. What caused the change from fig

NeX [460]

The change from figure one to figure two was most likely caused by erosion. Erosion is the process of something being eroded by wind, water, or other natural agents.

7 0

3 years ago

Read 2 more answers

Why doesn’t a broken wineglass spontaneously fix itself, from a thermodynamic point of view?

Alla [95]

The answer is the option<span> 3.) Fixing a wineglass requires a large decrease in entropy.

Entropy is a termodynamical variable and it is defined as the degree of disorder of the system.

As per the second law of thermodynamics the spontaneous changes only occur when the entropy increases.

</span>Fixing the broken glasses by itself meant to decrease the entropy spontaneusly which violate the principle or second law of thermodynamics. So, it is not possible.

8 0

3 years ago

Read 2 more answers

The damage caused by an earthquake depends on which factors? Select all that apply.

Alex Ar [27]

I would be inclined to go with A, C and D

3 0

3 years ago

Which of the following is referenced in the modern "periodic law"

katovenus [111]

Atomic number is correct

4 0

3 years ago

The vapor pressure of pure benzene is 750.0 torr and the vapor pressure of toluene is 300.0 torr at a certain temperature. You m

kow [346]

Answer:

Mole fraction of benzene in pure solution is 0.4472

Explanation:

Vapor pressure of pure benzene= 750 torr

Vapor pressure of pure toulene= 300 torr

Mole fraction of benzene in vapor= 0.669

1/P=Xa/Pa+ Xb/Pb

Where

Xa = mole fraction of A in water

Xb = mole fraction of B in water

P= Total pressure

Pa= total vapor pressure of pure A

Pb = total vapor pressure of pure B

Xa+Xb=1

Let A be benzene and B be toulene

We have Xa=0.669 and Xb= 0.331

1/P= 0.669/750 + 0.331/300

1/P= 0.000892/torr + 0.001103/torr

1/P=0.001995/torr

P= 501.25torr

We have P= Pa+ Pb

Where Pa= XaPa0

And Pb=XbPb0

Where

Xa= mole fraction of A in solution

Xb= mole fraction of B in solution

Now, substitute the data into the formula

501.25torr=Xa750torr + (1- Xa) 300 torr

Xa450torr + 300torr

Xa(450torr)= 201.25torr

Xa= 0.4472

Therefore, mole fraction of benzene in pure solution is 0.4472

7 0

3 years ago