217 - Chemistry Questions Answers

A hydrogen like system has ionisation enthalpy 11808KJ/mol

on converting it into eV we get [11808*1000]/[6.023*10²³*1.6*10^-19]  = 122.53 eV

now formula for this energy is [-Z²/n²]13.6 eV

for n = 1, Z will be 3

formula is πV = nRT or π = MRT,   M is molarity

strength of solution is 1.25m

so 1000 gm water ..............................................1.25 mole sucrose

so 1000 gm water .............................................1.25*342=427.5gm sucrose

so 1427.5 gm solution ....................................1.25 mole sucrose

so 1427.5/1.34=1065.30 ml = 1.0653 L solution ...........................1.25 mole sucrose

so M = 1.25/1.0653

put all the values to get answer.

according to Heisenberg principle product of uncertainity in position and momentum of a particle is greater than or equal to h/4π, since uncertanity in position of both the particle are same so same will be the momentum uncertainty minima.

for n = 1                      E = 2.18*10^-18

for n = 4                      E = 2.18*10^-18/16

so hν = 15*2.18*10^-18/16

so ν = 15*2.18*10^-18/16*6.634*10^-34

so ν = 3.08*10¹⁵

O-O         498.36 kJ/mole

S-S         425.30 kJ/mole

Se-Se      332.6 kJ/mole

Te-Te      259.8 kJ/mole

i think it should be trans 2 butene 

sp³ both

CH₃CO--OC₂H₅

This is the form of ester. In the presence of anhydrous AlCl₃, C₆H₆ will give reaction with ester 

This is well known Reimer Tiemann reaction

Product will be 

 CH3CH2CH2CH2NC

CaCO₃     ---------->   CaO   +   CO₂ (g)

0.2 mole                   0            0

0.06                       0.14       0.14

so K_p= p                       only CO₂ is gas so its pressure is considered 

now p = 0.14*0.0821*1073/10 

now solve