A 20.00 g mixture of magnesium and zinc metal reacting with excess hydrochloric acid produced 1.102 g of hydrogen gas. What is the percent zinc in the original mixture?

He table below gives the atomic mass and relative abundance values for the three isotopes of element m. relative abundance (%) atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 what is the average atomic mass (in amu) of element m? 2.86 5.36 24.30 24.98