Find the ratio of the effusion rate of hydrogen gas to the effusion rate of krypton gas. express the ratio of effusion rates to four significant figures.

The rate of effusion of a gas is inversely proportion to the to the square root of the mass of its particles.

the ratio of effusion of hydrogen gas to krypton gas is calculated as follows

Re of hydrogen / Re of krypton = square root of molar mass of krypton/molar mass of hydrogen

that is sqrt of 83.793/2 g/mol = 6.47

rate of hydrogen = 6.47x rate of krypton