Which of the following correctly describes the decomposition of aqueous nano3?
given:
nano3(aq): δh= –477 kj

the molar enthalpy is –447 kj and the reaction is exothermic.

the molar enthalpy is 447 kj and the reaction is exothermic.

the molar enthalpy is –447 kj and the reaction is endothermic.

the molar enthalpy is 447 kj and the reaction is endothermic.

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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tracks, burrows, eggshells, nests, tooth marks, or gastroliths