Determine the molecular mass of the following compounds

(a).

(4 × C) + (8 × H)

= (4 × 12) + (8 × 1)

= 48+8

= 56 g

(b).

= (4 × C) + (6 × H)

= (4 × 12) + (6 × 1)

= ( 48+6 )

= 54 g

(c).

= ( 2 × Si ) + ( 4×Cl ) + (2×H)

= (2×28) + (4×35.5) + (2×1)

= 56 + 142 + 2

= 200 g

(d).

= (1×P) + (4×O) + (3×H)

= 31 + 64 + 3

= 98 g

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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