The double or triple bond are needed because as they serves as a source of electron density and serves as a nucleophile.
The double bond or triple bond are electron rich entities capable of donating electrons thus act as nucleophile (species that donate electrons) and serve as electron dense region in molecules.
To know more about double or triple bond, click here,
brainly.com/question/21684413
#SPJ4
Answer:
The charge on H is partial positive and the charge on I is partial negative.
δ+H−Iδ−
The percent ionic character is 5.15 %.
Explanation:
The ionic compound is formed by the complete transfer of electron from one atom to another. The one atom thus carry the positive charge while the other which accept the electron became negative. like in case of NaCl .This have 100% ionic character.
In covalent bond, the bond is formed by the sharing of electron between two atoms. The one atom which greatly pull the electrons towards itself is became partial negative while the other became partial positive atom. In this way electronegativity difference is created. For example in HI bond hydrogen is partial positive and have 2.2 electronegativity while the electronegativity of iodine is 2.66.
Percent ionic character:
Formula:
%ionic character = [1- e∧-(0.25)(x)²] × 100
X= XA - XB
XA = higher electronegativity
XB = lower electronegativity
X = 2.66 - 2.2
X = 0.46
now we will determine the %ionic character.
%ionic character = [1- e∧-(0.25)(x)²] × 100
%ionic character = [1- e∧-(0.25)(0.46)²] × 100
%ionic character = [1- e∧-(0.25)(0.2116)] × 100
%ionic character = [1- e∧-(0.0529)] × 100
%ionic character = [1- 0.9485)] × 100
%ionic character = 0.0515 × 100
%ionic character = 5.15%
The more negative the enthalpy is, the more spontaneous the reaction will be, because a negative enthalpy releases heat. The more positive the entropy is, the more spontaneous the reaction will be, because a positive entropy increases disorder.
It can be said that the measurements of the students are precise but not accurate.
<h3>What is accuracy and precision?</h3>
Accuracy is the degree of conformity of a measure to a true or standard value while precision is the ability of a measurement to be reproduced consistently.
Simply put, measurements are said to be accurate when they are close to a true or standard value but are said to be precise when they are close to one another.
According to this question, a student measures the mass of 40 mL of a liquid 3 times and obtained the following mass readings: 28.5g, 28.4g and 28.2g.
Based on the measurement, the measured data are precise because they are close to one another but are not accurate because they are not near the standard value of 37.9g.
Learn more about precision and accuracy at: brainly.com/question/15276983
#SPJ1
