Considering znco3 has molar mass 125.40 g/mol and avogadro constant 6.022×10^(23),which three conversion factors are correctly written below

to improve her experimental investigation, dalila should add a row in which no fertilizer is used. by a having a contrasting row in which no fertilizer is used, she will have a control group that will her understand the effects of the fertilizer in the plant developments vs the development of the plant when no fertilizer is used.