Which of these equations represent reactions that could be used in constructing an electrochemical cell? Check all that aprly
CH4 +202 → CO2 +2H20
Cr + Cu2+ → Cr2+ + Cu
2Ag- + Fe → 2 Ag+Fe2+
Cr- + Ag+ → AgCI
NH3 + H+ → NH4+
THE ANSWER IS B&C

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

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.

Imagine one batch of soup (batch “a”) is made with 8.19 g/can of salt, according to the recipe, and a second batch of soup (batch “b”) is made with 8.32 g/can of salt. explain which batch would be more resistant to frost damage if it is shipped a great distance in winter and explain why.