Answer:
the first and last
Explanation:
the enthalpy Change is positive.
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Answer: a. Hydrofluoric acid
d.sulfuric acid
e. Dihydrogen phospataion
b.hydrobromic acid
c. Nitric acid
Explanation:
The highlighted atoms have sp2 - sp3 hybridization. The highlighted atoms are carbon and nitrogen as shown.
The structure of Xanthine is shown in the image attached to this answer. The indicated atoms are Carbon and nitrogen as shown. Let us remember that hybridization has to do with the mixing of atomic orbitals to form appropriate hybrid orbitals that are suitable for overlap with orbitals of other atoms.
The highlighted carbon atom is sp2 hybridized because it has a carbon nitrogen double bond while the highlighted nitrogen atom is sp3 hybridized. Therefore, the highlighted atoms have sp2 - sp3 hybridization.
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Answer:
Correct option :b(false)
Explanation:
ionic compound is formed when electrons are transferred from metal to non metal and electron is removed from outer shell of metal while removing the electron we have to supply energy externally which is known as ionization energy so if ionization energy is less then electron can easily come out so ionization energy of metal should be low not high.
ionic compound is formed when electron which has transferred by metal should go to the outer shell of non metal and accepting of electron depends on the electron affinity higher the electron affinity higher is the electron accepting tendency so electron affinity of non metal should be high not low .
hence given statement is false.
Answer:
4.50
×
10
22
gold atoms
6.022
×
10
23
gold atoms per mole
×
196.97
⋅
g
⋅
m
o
l
−
1
=
?
?
g
Explanation:
One mole of gold has a mass of
196.97
⋅
g
⋅
m
o
l
−
1
. By definition there are
Avogadro's number
of gold atoms that constitute this mass, i.e.
N
A
=
6.022
×
10
23
.
So we take the quotient to get an answer in moles, and mulitply this by the molar mass to get the mass:
4.50
×
10
22
gold atoms
6.022
×
10
23
gold atoms per mole
×
196.97
⋅
g
⋅
m
o
l
−
1
=
?
?
