Ask question

Ask question

All categories

3 years ago

15

Calculate the activation energy for vacancy formation in Al given that the equilibrium number of vacancies at a temperature of 7

73 K is 7.57 X 1023 m-3 . The atomic weight and density of Al are, respectively, 26.98 g/mol and 2.62 g/cc.

1 answer:

Ainat [17]3 years ago

8 0

Answer:

Explanation:

Thx

You might be interested in

Which organisms can reproduce through budding?

julia-pushkina [17]

It's sponges because they reproduce through budding. Ants have a queen and so do bees. And Strawberries reproduced through seeds and flowers

7 0

3 years ago

givi [52]

Ummm I just need to answer questions sorry!!!

8 0

3 years ago

How many moles of helium gas are contained in a 4.0 L flask at STP

Ratling [72]

First, you convert liters to moles.
Usually you have to go to grams but this is STP.

Get moles directly by dividing the 4 by STP (22.4)
$\frac{4}{22.4} =0.17857142857$
About $1.8*10^{-1}$ or 0.18 moles whichever your teacher prefers

3 0

3 years ago

How many electrons can be held in sub level I=3?

Zinaida [17]

2 is your answer hope you get it right

6 0

3 years ago

The radius of a lithium atom is 130 picometers, and the radius of a fluorine atom is 60 picometers. The radius of a lithium ion,

natali 33 [55]

Answer:

A positive ions is always smaller than the corresponding atom.

A negative ion is always larger than the corresponding atom.

Explanation:

The reason for this is that, when a positive ion is formed, a full shell is usually removed with its electrons thereby reducing the size of the electron cloud and decreasing the size of the electron cloud.

A negative ion is formed by addition of more electrons to the electron cloud hence it spreads out. Interelectronic repulsion accounts for the larger size of the negative ion.

3 0

3 years ago