The nitrogen which plants absorb must come from the atmosphere free nitrogen in the soil nitrogen compounds in the soil

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate

How does the atmosphere to make earth livable? check all that apply. causes the seasons contains oxygen provides warmth creates important nutrients blocks harmful energy from the sun plz like !

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