_________ grams of 3-Hydroxy propanal (MW=74) must be dehydrated to produce 7.8 g of acrolein (MW=56) `(C_3 H_4 O)` if the percentage yield is 64. (Round off to the Nearest Integer).
[Given : Atomic masses : C:12.0u, 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)

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 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]

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 )

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) ]

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]

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]

The pressure exerted by a non-reactive gaseous mixture of 6.4g of methane and 8.8 g of carbon dioxide in a 10L vessel at 27^(@)C is "__________" kPa. ( Round off to the Nearest Integer ). [ Assume gases are ideal, R = 8.314] mol^(-1) K^(-1) Atomic masses : C : 120 u, H : 1.0 u, O : 16.0 u ]

What is the mass of 0.5 mole of wate (H_(2)O) . (Atomic masses : H = 1 u, O = 16 u )