A 650 molar solution of KOH (aq.) has a density of`1.89 g cm ^(-3).` The molarity of the solutio is `"________"` mol `dm ^(-3)` (Round off to the Nearest Integer).
[Atomic mass `: K:39.0 u, O : 16u, H:1.0 u]`

3.0 molal NaOH solution has a density of 1.110 g//mL . The molarity of the solution is:

The density of NaOH solution is 1.2 g cm^(-3) . The molality of this solution is _______ m. (Round off to the Nearest Integer) [Use : Atomic masses : Na : 23.0 u O : 16.0 u H : 1.0 u] Density of H_(2)O : 1.0 g cm^(-3) ]

The mole fraction of a solution in a 100 molal aqueous solution is "_____________"xx 10^(-2) ( Round off to the Nearest Integer ). [ Given : Atomic masses : H : 1.0 u, O : 16.0 u]

Consider the above reaction. The percentage yield of amide product is _________. (Round off to the Nearest Integer). (Given : Atomic mass : C : 120 u, H : 10 u, N : 14.0 u, O : 16.0 u, Cl : 35.5 u)

In the above reaction, 3.9 g of benzene on nitration gives 4.92 g of nitrobenzene. The percentage yield of nitrobenzene in the above reaction is "_____________" %. (Round off to the Nearest Integer ). ( Given atomic mass : C : 12.0 u, H : 1.0 u, O : 16.0 u, N : 14.0 u )

Complete combustion of 3 g of ethane gives x xx 10^(22) molecules of water. The value of x is _______ . (Round off to the Nearest Integer). [Use : N_A = 6.023xx10^(23) , Atomic masses in u : C : 12.0 , O : 16.0 , H : 1.0]

KBr is doped with 10^(-5) mole percent of SrBr_(2) . The number of cationic vacancies in 1 g of KBr crystal is ________ 10^(14) . (Round off to the Nearest Integer). [Atomic Mass : K : 39.1 u, Br : 79.9 u N_(A)=6.023 xx 10^(23) ]

A5.0 m mol dm^(-3) aqueous solution of KCl has a conductance of 0.55 ms when measured in a cell of cell constant 1.3 cm^(-1) The molar conductivity of this solution is mSm^(2) mol^(-1) . (Round off to the Nearest Integer)

Consider the above reaction where 6.1 g of Benzoic acid is used to get 7.8 g of m-broo benzoic acid. The percentage yeild of the product is ......... (Round off to the Nearest Integer). [Give : Atomic masses : C: 12.0 u, H=1.0 u, O=16.0, u , Br=80.0u]