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dimaraw [331]
1 year ago
9

What does Na2S formula mean?; What is the two in Na2S called?; How do you write Na2S?; What state of matter is Na2S?

Chemistry
1 answer:
xxTIMURxx [149]1 year ago
8 0

The chemical compound sodium sulfide has the formula Na2S. It is written as Na_{2}S. It has a crystalline state. Na is followed by a two or 2. this indicates that the molecule has two of the specified element's atoms.

There is just one of these because there is no number following the S.

In all, this molecule consists of one sulfur atom and two sodium atoms.

A compound's chemical formula, which uses symbols for combining atoms, reveals the composition of the complex. We require the valency of the combining parts in order to write the formula.

The sodium sulfide chemical formula must be written down. So sodium and sulfur make up the two elements in the chemical. Sodium has a valency of +1, while sulfur has a +2.

For more information on sodium sulfide kindly visit to

brainly.com/question/10762285

#SPJ4

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Cobalt, Co, has 27 electrons. Write out the entire electron configuration for cobalt using spdf notation.
Hatshy [7]

Answer:

Co = 1s2 2s2 2p6 3s2 3p6 4s2 3d7

Explanation:

Number of electrons = 27

The closest noble gas before cobalt is Argon and argon has 18 electrons.

Co = [Ar]  ; Remains 27 - 18 = 9  more electrons to fill.

The next orbital in order of increasing energy is the 4s orbital. However it can only hold a maximum of 2 electrons.

We have;

Co = [Ar] 4s2; Remains 27 - 20 = 7 more electrons to fill.

The next orbital in order of increasing energy is the 3d orbital. It can have a maximum of 10 electrons.

So we have;

Co = [Ar] 4s2 3d7

The electronic configuration of Ar = 1s2 2s2 2p6 3s2 3p6

This means the entire configuration of cobalt is;

Co = 1s2 2s2 2p6 3s2 3p6 4s2 3d7

8 0
3 years ago
Name two units for density? I need help!!!!
yaroslaw [1]

Answer:

Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth ’s density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in MKS or SI units). For example, the density of air is 1.2 kilograms per cubic metre.

Explanation:

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3 years ago
For each of the following cation-anion pairs, give the correct formula for the ionic salt.
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Follow Me Please ...................

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How can the Swartz process be modified to work for bacteria? Explain.​
scZoUnD [109]

Answer:

https://swartzbiotechnologylab.sites.stanford.edu/research

Explanation:

7 0
3 years ago
When [H+] = 3.33 x 10-7 what is the ph?
Fittoniya [83]

Answer:

<h2>6.48 </h2>

Explanation:

The pH of a solution can be found by using the formula

pH = - log ([ {H}^{+} ])

From the question we have

pH =  -  log(3.33 \times  {10}^{ - 7} )  \\  = 6.477555...

We have the final answer as

<h3>6.48 </h3>

Hope this helps you

8 0
3 years ago
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