The heat energy obtained on burning 2 kg of hydrogen,coal and petrol are given below : Petrol -9 xx 10^7 j ,Hydrogen - 3 xx 10^8 j , Coal -6 xx 10^7 j
How much is the calorific value of hydrogen?

The heat energy obtained on burning 2 kg of hydrogen,coal and petrol are given below : Petrol -9 xx 10^7 j ,Hydrogen - 3 xx 10^8 j , Coal -6 xx 10^7 j Which of these is the most efficient fuel?

The heat energy obtained on burning 2 kg of hydrogen,coal and petrol are given below : Petrol -9 xx 10^7 j ,Hydrogen - 3 xx 10^8 j , Coal -6 xx 10^7 j Arrange these fuels in the ascending order of their calorific values.

The magnetic field of a plane electromagnetic wave is given by B= 2 xx 10^-7 sin (0.5 xx 10^3 x +1.5 x 10^11 t) : What is wave length and frequency?

The electron energy for the quantum number n = 2 in a hydrogen atom is Given, m =9.1xx10^(-31)"kg",e=1.6xx10^(-19) C,h =6.6xx10^(-34)"kgm"^(2)s^(-1)

Energy of an electron in the ground state of hydrogen atom is -2.18 xx 10^(-18) J . Calculate the inoisation enethalpy of atomic hydrogen in J mol^(-1) .

The quantized energy of an electron in hydrogen atom for the n^(th) it level is given by E_n=(1.312)/n^2 xx 10^6 Jmol^(-1) , Calculate the energy required to remove the electron completely from an excited hydrogen atom when its quantized level, n=3 , (N_A=6.02 xx 10^(23) mol^(-1))