How many moles of NO2 are needed to increase the temperature of a 333 gram block of iron from 220C to 13000C? (specific heat of iron is 0.49 J/g0C) 3NO2 + H2O --> 2HNO3 + NO ∆H = - 138 kJ /mol

h let me think

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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