What is the number of moles in 15.0 g ash3?

We know that

Atomic mass of As = 74.95

Atomic mass of H = 1

so molar mass of = 77.95

given mass of = 15.0 g

therefore moles of in the given mass will be

the number of moles in 15g of =0.192 mole

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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b.final