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

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons

Consider the directing effects of the substituents on salicylamide and predict the possible structures of the iodination products. which do you think will be the major product?