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olchik [2.2K]
4 years ago
9

If you were asked to convert 25 kg to the unit mg, which of the following would be the first fraction used in the conversion?

Chemistry
1 answer:
Rufina [12.5K]4 years ago
7 0
To convert the unit kg to mg, the result needs to be written in scientific notation. And 1 kg = 10^6 mg. So the answer is 2.5*10^7 mg.
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draw the lewis structure for pcl6, then answer the following questions: 1. how many valence electrons does this compound have? 2
DedPeter [7]

The Pcl6 has 48 bonded electrons and 18 lone pairs.

The Lewis structure of Pcl6 is as follows: -

Phosphorous is bonded with 6 chlorine atoms with 18 lone pairs.

Lewis structures, also known as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDS), are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule. [1][2][3] A Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds.

    In Lewis structure, atoms are bonded with single bonds. If total number of electrons are 't' and number of bonds are 'n', then t-2n number of electrons are to be placed. Once the central atom is placed, they need to complete the octet rule.

Learn more about Lewis-dot structure from,

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5 0
1 year ago
In the deep space between galaxies, the density of atoms is as low as 106 atoms/m3, and the temperature is a frigid 3.0 K. What
Savatey [412]

Answer:

4.388*10^-^2^1

Explanation:

Given:

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we know the values of

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PV=NK_{b} T

rearranging the formula and substituting values

P=(NK_{b} T)/V

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P=4.388 *10^-^2^1 Pa

5 0
3 years ago
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Answer:

I think your answer is D.

{sorry if I'm wrong}

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C and A, in order... space them out more when you ask a question.. i had to re-read it.
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