Answer:
CH₃CH₂CH₂COOH > CH₃CH₂COOH > ClCH₂CH₂COOH > ClCH₂COOH
Explanation:
Electron-withdrawing groups (EWGs) increase acidity by inductive removal of electrons from the carboxyl group.
Electron-donating groups (EDGs) decrease acidity by inductive donation of electrons to the carboxyl group.
- The closer the substituent is to the carboxyl group, the greater is its effect.
- The more substituents, the greater the effect.
- The effect tails off rapidly and is almost zero after about three C-C bonds.
CH₃CH₂-CH₂COOH — EDG — weakest — pKₐ = 4.82
CH₃-CH₂COOH — reference — pKₐ = 4.75
ClCH₂-CH₂COOH — EWG on β-carbon— stronger — pKₐ = 4.00
ClCH₂COOH — EWG on α-carbon — strongest — pKₐ = 2.87
The Sun heats the Earth more at the equator
Number of particles in one mole of a pure substance
Explanation:
The avogadro's constant is the number of particles in one mole of a pure substance.
- A mole is a unit of quantity of particles.
- It can be likened to a quantity of things in everyday life like a dozen, a gross etc.
- A dozen is 12 units of substance.
- A mole contains 6.02 x 10²³particles.
- 6.02 x 10²³ is called the Avogadro's number or constant.
- This was proposed by Amedo Avogadro.
- A mole is the amount of a substance that contains the Avogadro's number of particles.
- The particles are atoms, molecules, formula units, ions, electrons, protons, neutrons e.t.c
learn more:
Avogadro's constant brainly.com/question/2746374
#learnwithBrainly
Number of molecules = moles x 6.02 x 10^23 = 2 x 6.02 x 10^23
= 1.204 x 10^24 molecule.
Hope this helps!