In a system for separating gases a tank containing a mixture of hydrogen and carbon dioxide is connected to a much larger tank where the pressure is kept very low. the two tanks are separated by a porous membrane through which the molecules must effuse. if the initial partial pressures of each gas is 5.00 , what will be the mole fraction of hydrogen in the tank after the partial pressure of carbon dioxide has declined to 4.50 ? a. 52.1 %.b. 37.2 %.c. 27.4 %.d. 32.1 %.e. 4.68 %.

A 52.63%

Explanation:

The mole fraction of each gas  is equivalent to the ratio of the partial pressure as indicated below:

Partial pressure of Hydrogen = 5.00

Partial pressure of Carbon-dioxide=  4.50

Total gas pressure = 9.50

Mole fraction of Hydrogen = Partial pressure of Hydrogen/ Total gas pressure

                                            =    5.00/9.50

                                            =   0.5263

                                            = 52.63%

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.