Consider the complete combustion of butane, the amount of butane utilized to produce 72.0 g of water is ________ `xx 10^(-1)` g. (in nearest integer)

In the combustion of butane, 72g of water is given out, how much butane is taken

Sodium oxide reacts with water to produce sodium hydroxide. 20.0 g of sodium oxide is dissolved in 500 mL of water. Neglecting the change in volume, the concentration of the resulting NaOH solution is _______ xx 10^(-1)M . (Nearest integer) [Atomic mass : a = 23.0, O = 16.0, H = 1.0 ]

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]

The number of moles of CuO, that will be utilized in Dumas method for estimating nitrogen in a sample of 57.5 g of N,N-dimethylaminopentane is ____________ xx10^(-2) . (Nearest integer)

If the standard molar enthalpy change for combustion of graphite powder is -2.48 xx 10^(2)kJ mol^(-1) , the amount of heat generated on combustion of 1g of graphite powder is ______kJ. (Nearest integer).

1.46 g of a biopolymer dissolved in a 100 mL water at 300 K exerted an osmotic pressure of 2.42 xx 10^(-3) bar. The molar mass of the biopolymer is ________ xx 10^(4)g mol^(-1) . (Round off to the Nearest Integer)