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Veseljchak [2.6K]
3 years ago
11

Mc011-1.jpg Which kind of reaction does this graph represent?

Chemistry
2 answers:
Xelga [282]3 years ago
8 0
The graph above represents a synthesis reactions in which two substances come to together to form one compound by releasing heat energy!

hope that helps! :))
Sonbull [250]3 years ago
7 0
It’s an exothermic reaction
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The ph of a 0.30 m solution of a weak acid is 2.67. what is the ka for this acid?
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Draw the best Lewis structure for NH3 by filling in the bonds, lone pairs, and formal charges. (Assign bonds, lone pairs, radica
kiruha [24]

Answer :  The Lewis-dot structure of NH_3 is shown below.

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, NH_3

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Therefore, the total number of valence electrons in NH_3 = 5 + 3(1) = 8

According to Lewis-dot structure, there are 6 number of bonding electrons and 2 number of non-bonding electrons.

Now we have to determine the formal charge for each atom.

Formula for formal charge :

\text{Formal charge}=\text{Valence electrons}-\text{Non-bonding electrons}-\frac{\text{Bonding electrons}}{2}

\text{Formal charge on N}=5-2-\frac{6}{2}=0

\text{Formal charge on }H_1=1-0-\frac{2}{2}=0

\text{Formal charge on }H_2=1-0-\frac{2}{2}=0

\text{Formal charge on }H_3=1-0-\frac{2}{2}=0

Hence, the Lewis-dot structure of NH_3 is shown below.

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What is the chemical formula for decomposition?
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