Một người nông dân suqr dụng 2kg phân bón (NH4)2 HPO4 để bón cây .Tính khối lượng đạm N và Photpho (P2O5) đã bón cây

How do scientists think that gravity affected the formation of our solar system?

Enzymes affect the reactions in living cells by changing the

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.