electron dot structure
Explanation:
Chemical reactions are driven by transfer or sharing of electrons between two or more atoms. To show a specie that is reactive, a sound knowledge of the distribution of electrons in the atom is necessary.
- The electron dot structure shows only chemical symbol of the element surrounded by dots which represents the valence electrons.
- The chemical symbol represents the nucleus and all electrons except the valence ones.
- The dots arranged on the four sides are called lone pairs. Those that are unpaired are called odd electrons.
- Chlorine has 7 valence electrons in its outermost shell.
- It is made up of 3 lone pairs and 1 odd pair of electron.
- The odd pair accounts for the reason why chlorine is very reactive.
- It will only require just one electron to join the odd pair so as to complete the octet and be like the noble gases.
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Answer:
A
Explanation:
Using Henderson-Hasselbalch equation
pH = pKa + log (A⁻ (base)) / ( HA (acid))
1) if the pH of the solution is known as is the pKa for the acid , the ratio of the conjugate base to acid can be determined; it is true considering the formula above
2) At pH = pKa for an acid, there is an equal amount of conjugate base to acid in the solution; this is also true because at pH = pKa, the log of the ratio of the conjugate base to acid equal to zero and antilog of zero is 1 which means their proportion is the same.
3) At pH > pKa for an acid, the acid will be mostly ionized; this is true also the solution high amount of deprotonated form of the acid.
polyethylene contains HC=CH units.
mass of this is 26 gram/mol
number of such units =13500/26
The answer is c ..............::
Answer:
Explanation:
We will need a balanced equation with moles, so let's gather all the information in one place.
CH₃C₆H₄NH₂·HCl + (CH₃CO)₂O ⟶ CH₃C₆H₄NHCOCH₃ + junk
V/mL: 70.
c/mol·L⁻¹: 0.167
For simplicity in writing , let's call p-toluidine hydrochloride A and N-acetyl-<em>p</em>-toluidine B.
The equation is then
A + Ac₂O ⟶ B + junk
1. Moles of A
2. Moles of B
The molar ratio is 1 mol B:1 mol A
Moles of B = moles of A = 12 mmol = 0.012 mol