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oksano4ka [1.4K]
3 years ago
7

I need help understanding polyatomic ions

Chemistry
1 answer:
Vinvika [58]3 years ago
3 0
A polyatomic ion, also known as a molecular ion, is a charged chemical species (ion) composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single unit. The prefix poly- means "many," in Greek, but even ions of two atoms are commonly referred to as polyatomic
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HELP ASAP
In-s [12.5K]

Answer:

greenhouse effect is the same as global warming

Explanation:

they both mean warming of the earths surface

8 0
2 years ago
I begin the reaction with 0.45 g of beryllium. If my actual yield of beryllium chloride (mm = 79.91 g/mol) was 3.5 grams, what w
trasher [3.6K]

The percentage of yield was 777.78%

<u>Explanation:</u>

We have the equation,

Be [s]  +  2 HCl [aq]  →  BeCl 2(aq]  + H 2(g]  ↑ Be (s]  + 2 HCl [aq]  →  BeCl 2(aq]  + H 2(g] ↑

To find the percent yield we have the formula

Percentage of Yield= what you actually get/ what you should theoretically get  x 100

                                   =3.5 g/0.45 g 100

                                    = 777.78 %

The percentage of yield was 777.78%

5 0
3 years ago
How was the modern understanding of the atom developed?
Zepler [3.9K]

Answer:

The modern understanding of an atom was developed by the quantum theory

8 0
3 years ago
0.0045 x 0.000789 sig fig
lesantik [10]

Answer:

The answer IS 0.0000035505. Hope it helps!

Explanation:

8 0
3 years ago
Read 2 more answers
Below is the Lewis structure of the hydrogen cyanide molecule.
lianna [129]

Answer :

The number of bonding pairs of electrons around the hydrogen atom = 2

The number of lone pairs of electrons around the hydrogen atom = 0

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, HCN

As we know that carbon has '4' valence electrons, hydrogen has '1' valence electrons and nitrogen has '5' valence electrons.

Therefore, the total number of valence electrons in HCN = 1 + 4 + 5 = 10

According to Lewis-dot structure we conclude that, there are 8 number of bonding electrons and 2 number of non-bonding electrons.

The number of bonding pairs of electrons around the hydrogen atom = 2

The number of lone pairs of electrons around the hydrogen atom = 0

8 0
3 years ago
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