Can someone plzzz with numbers 14,15,#1 plzzz show work too cuz i don’t understand this plzzz me

Which atom or ion is the largest? 0 a. 0 0 0 0 e. li

0.09 moles of sodium sulfate in 12 ml of solution

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?