Examine the periodic table which four pairs of elements would be reversed in order if the elements were listed by increasing atomic mass instead of increasing atomic numbers

Apeak with a retention time of 407 s has a width at half-height (w1/2) of 7.6 s. a neighboring peak is eluted 17 s later with a w1/2 of 9.4 s. a compound that is known not to be retained was eluted in 2.5 s. the peaks are not baseline resolved. how many theoretical plates would be needed to achieve a resolution of 1.5?

Calculate - analysis of compound composed of iron and oxygen yields 174.86 of fe and 75.14g of o. what is the empirical formula for this compound?

What is the indicator of the number of ions in solution? the amount of conductivity the amount of precipitate the amount of solute added