please help! please show work

1. Dorothy brings a 500ml pumpkin spice latte to class. How many moles of hydronium ion has she consumed? (Assume the pH of the pumpkin spice latte is 5 and that it is an aqueous solution. First determine the concentration of hydrogen ions (H+)in the latte, or its molarity, then calculate the number of moles.) 2. How many hydrogen ions has she consumed, not moles but ions, you will need Avogadro's number here? 3. Instead, Sophia consumes 100ml of Diet Cola (pH 2), who has consumed more hydrogen ions