Educational

 

   Come on man, enough is enough, can't do it anymore, let's leave. I have been trying for so many days, no improvement is visible. I am trying so hard, no result is coming out. Now I can't do it anymore, let's leave.And for how long, man? I am working very hard but not getting the result as expected. And how hard should I work and how many days should I wait? When will I get success? Somebody tell me Such questions are bound to come to mind. Whenever we start any new work, we want that we get success in that work as soon as possible. But everyone's luck is different. Some get success quickly. But some take a lot of time to get success, then those who take more time, this question is bound to come in their mind. The mind gets frustrated. How much more work? How much more time to wait? When will we get the success that others have achieved? So what should we do in such times? Should we continue with our work or should we give up and give up on ou...

 #atomicmass #calculation_of_atomic_mass  #advaitchemistry At No              Symbol                Name     Atomic Wt 1 H Hydrogen 1.008 2 He Helium 4.002   3 Li Lithium 6.94   4 Be Beryllium 9.012 5 B Boron 10.81 6 C Carbon 12.011 7 N Nitrogen 14.007 8 O Oxygen 15.999 9 F Fluorine 18.99 10 Ne Neon 20.18 11 Na Sodium 22.9   12 Mg Magnesium 24.305 13 Al Aluminium 26.98 14 Si Silicon 28.08 15 P Phosphorus 30.97 16 S Sulfur 32.06 17 Cl Chlorine 35.45   18 Ar Argon 39.95   19 K Potassium 39.098 20 Ca Calcium 40.078 21 Sc Scandium 44.956 22 Ti Titanium 47.867 23 V Vanadium 50.942 24 Cr Chromium 51.996 25 Mn Manganese 54.938 26 Fe Iron 55.84 27 Co Cobalt 58.93 28 Ni Nickel 58.69 29 Cu Copper 63.54 30 Zn Zinc 65.38 31 Ga Gallium 69.72 32 Ge Germanium 72.630 33 As Arsenic 74.92 34 Se Selenium 78.97 35 Br Bromine 79.90 36 Kr Krypton 83.798   37 Rb Rubidium 85.46...

 Calculate E Cell Of the following 1)       a)   Ni(s)|Ni 2+ (0.001M)||Cu 2+ (0.01M)|Cu(s)                                 E 0 (Ni 2+ |Ni)=-0.26V            E 0 (Cu 2+ |Cu)=+0.34V 2)       b)   Zn(s)|Zn 2+ (0.01M)||Cu 2+ (0.025M)|Cu(s)                               E 0 (Zn 2+ |Zn)=-0.76V          E 0 (Cu 2+ |Cu)=+0.34V 3)       c )   Mg(s)|Mg 2+ (0.013M)||Al 3+ (0.01M)|Al(s)                            ...

Q.1 Calculate the osmotic pressure of 20% (wt./vol.) anhydrous Ca(N03)2 solution at 0°C assuming 100% ionisation.  Q.2 The vapour pressure of a solution containing 2 g of NaCl in 100 g water, which dissociated in one Na and one CI" ion in water, is 751 mm, at 100°C. Calculate the degree of ionisation ofNaCl. Q.3 17.4% (wt./vol.) K2S04 solution at 27°C is isotonic to 5.85% (wt./ vol.) NaCl solution at 27°C. If NaCl is 100% ionised, what is % ionisation of K2S04 in aq. solution?  Q.4 A certain mass of a substance when dissolved in 100 g CfiHg lowers the freezing point by 1.28°C. The same mass of solute dissolved in 100 g of water lowers the freezing point by 1.40°C. If the substance has normal molecular weight in benzene and is completely dissociated in water, into how many ions does it dissociate in water? Kf for H2O and QH^, are 1.86 and 5.12 K mol-1 kg respectively. Q.5 The vapour pressure of a solution containing 2 g of an electrolyte BA in 100 g water, which ...

Q.1 Calculate pH of:  (a) 0.001 M HNO3  (b) 0 001 M H2SO4  (c) 0.005 M H2S04  (d) 0.01 M HCl,  (f) 100 M  HC1. Q.2  Calculate pH for :   (a) 0.001 M NaOH,   (b) 0.01 M Ca(OH)2  (c) 0.05 M Ca(OH)2  (e) 100 M NaOH,  (f) 0.0008 M Mg(OH)2