10 ! which of these is an example of an engineering solution?
options choices are listed in picture

Iknow #2 is d. i just need to know why

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process