What causes the emission of radiant energy that produces characteristic spectral lines for a given element?
2 answers:
You might be interested in
Answer:
1. pH = 1.23.
2.
Explanation:
Hello!
1. In this case, for the ionization of H2C2O4, we can write:
It means, that if it is forming a buffer solution with its conjugate base in the form of KHC2O4, we can compute the pH based on the Henderson-Hasselbach equation:
Whereas the pKa is:
The concentration of the base is 0.347 M and the concentration of the acid is 0.347 M as well, as seen on the statement; thus, the pH is:
2. Now, since the addition of KOH directly consumes 0.070 moles of acid, we can compute the remaining moles as follows:
It means that the acid remains in excess yet more base is yielded due to the effect of the OH ions provided by the KOH; therefore, the undergone chemical reaction is:
Which is also shown in net ionic notation.
Best regards!
- O-O single bonds and H-O single bonds in
molecules.
- H-O single bonds in
molecules.
- O=O double bonds in
molecules.
How many valence electrons do atoms in each molecule need for them to be stable?
- Each H atom needs two valence electrons to be stable.
- Each atom of an element other than H needs eight valence electron to be stable.
- There are two H atoms and two O atoms in an
more electrons to be stable.
- There are two H atoms and one O atom in an
more electrons to be stable.
- There are two O atoms in an
more electrons to be stable.
How many chemical bonds in each molecule?
Each chemical bond adds one valence electron to each bonding atom. Each chemical bond connects two atoms. As a result, each chemical bond adds two valence electrons to the molecule.
- Each
chemical bonds.
- Each
chemical bonds.
- Each
chemical bonds.
What chemical bonds are these? Again, each H atom needs only one more valence electron to be stable. It will share only one electron with O and form one H-O bond. The rest of the chemical bonds are between O atoms.
- There are two H atoms in each
- There are two H atoms in each
- There is no H atom in
Answer:
Isotopes of an element are atoms of the same element that have different number of neutrons.
