Ans with solution of the Q which u know

Ans with solution of the Q which u know 30. 31. 32. The mass of CO. produced from 620 g mixture of CzHaO, Oz. prepared to produce maximum energy (D) 320 g (A) 413 33 g (C)440g (B) 593 04 g Assuming complete precipdatton of AgCl„ calculate the sum of the molar concentration Of all the Ions if 2 L of 2 M Ag2SOa ts mixed With 4 [ of 1 M Naa solubon IS (D)25M (A) 4M (C) 3M (B) 2M A solution of A wt z 20) and B (mob wt = 10). IMole fraction XB 0 61 havtng density 0.7 g/ml then respectively molarty and molality ot B in this solution be and (A) 30 M. 75 m (C) 75m. 30 M (B) 75 m, M (D) Nore of these

Dear student,


Suppose the mass of Acetic acid  (C₂H₄O₂) is x g,
then mass of Oxygen gas O₂ is (620-x) g. 

Molecular Mass of Acetic acid (C₂H₄O₂) = 60g
Molecular Mass of Oxygen Gas (O₂) = 32g

To produce maximum energy,  

no. of moles of acetic acid / no. of moles of O₂ = 1/2 
=> n ( Acetic Acid) * 2 = n( Oxygen) * 1 
=> x/60 * 2 = (620 -x)/32  *1
=> (620-x)/x = 16/15
=>(620-x) + 1/x =16/15 + 1
=>620/x = 31/15
=>x = 620 *15 / 31

Mass of acetic acid = x 
Suppose Mass of CO₂ is (m) gram. 

3) Now by observing reaction, 
1 / n(Acetic acid) = 2 / n(CO₂)
=> n (Acetic acid) * 2 = n(CO₂) * 1
=> 2 * x/60 = m / 44
=>m = x*44*2 / 60
=>m = 620 * 15*44*2/31*60 = 440gm

Therefore, mass of CO₂ obtained is 440grams.

Regards,