std 9 gujarati ch.13 Rasto kari javana swadhyay solution || dhoran 9 gujarati chapter 13 swadhyay solution || ધોરણ 9 ગુજરાતી પાઠ 13 રસ્તો કરી જવાના સ્વાધ્યાય સોલ્યુશન || std 9 gujarat board || std 9 gujarati

Find the solution of the following: (-9)+(+13)

The first ionization constant of H_(2)S is 9.1xx10^(-8) . Calculate the concentration of HS^(Θ) ion in its 0.1 M solution. How will this concentration be affected if the solution is 0.1 M in HCl also? If the second dissociation constant if H_(2)S is 1.2xx10^(-13) , calculate the concentration of S^(2-) under both conditions.

What is the observed rotation when 0.1 M solutions of (R )-2 butanol is mixed with an equal volume of 0.05M solution of recemic 2-butnol and the resulting solution is taken in a cell of 5cm long tube in a polarimeter? The specific rotation of (R -2) butonal is +13.9^(@)

Let equations are x+y+z=1,x+3y+5z=beta,3x+4y+alpha z=9 find (alpha-beta) for which this system has infinite solution (a) 18 (b) 13 (c) 5 (d) 8

(+31) 5(B) 3ot-1 -be such that 2 sin a and cos B13Paragraph for question no. 9 to 11is a – 2 tan-+sin-and B=sin ' 1+ cost + cor) 16x2 – ax +b=0, where a, b e R.The value of tan secl cos( sin ))-) is equal to2=T/B=0are roots of the equationThe range of function f(x)=cot-? (x2+bx) is equal to(B) (0, 1)(C)2(D)31 The number of solutions(s) of the equation b sinx=(a-b)x, is equal to(B) 1(A)0