Using the measurements in the table, determine which unidentified metal has the lowest density. Metal Volume Mass A 12.5 cm3 122 g B 14.2 cm3 132 g C 18.1 cm3 129 g D 12.7 cm3 126 g Metal A Metal B Metal C Metal D

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %