Chemistry

Problem

0.65\,\text{g}

sample of zinc reacts completely with excess hydrochloric acid. The hydrogen gas produced is collected over water at

28^{\circ}\text{C}

and a barometric pressure of

765\,\text{mmHg}

. The collected volume of gas is

245\,\text{mL}

. The vapor pressure of water at

28^{\circ}\text{C}

28\,\text{mmHg}

. What is the percent yield of hydrogen for the reaction? a) 83\% b) 100\% c) 96\% d) 48\%