Answer : The molar mass of unknown gas is, 41 g/mole
Solution : Given,
Diffusion rate of neon gas = 7 cm/s
Diffusion rate of unknown gas = 4.9 cm/s
Molar mass of neon gas = 20 g/mole
According to the Graham's law, the rate of effusion of a gas is inversely proportional to the square root of the molar mass of the gas.
Formula used :
= diffusion rate of neon gas
= diffusion rate of unknown gas
= molar mass of neon gas
= molar mass of unknown gas
Now put all the given values in the above formula, we get the molar mass of unknown gas.
Therefore, the molar mass of unknown gas is, 41 g/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.
< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >