When ammonium nitrate is dissolved in water, energy is absorbed from the surroundings, causing a decrease in the resulting solution's temperature. which of the following best describes this type of reaction?

A reaction that absorbs energy from the solution and decreases the solution's temperature is called and endothermic reaction. A physical change that absorbs heat can also be described as endothermic.
The opposite of endothermic is exothermic. A reaction that is exothermic releases energy to the surroundings. This is observed as an increase in the temperature of the solution.

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.

Hello! mitosis and meiosis are the same, because they are both ways of dividing cells and reproducing cells. they are different in many ways, but the main one is that meiosis splits the number of chromosomes in 1/2, while the number of chromosomes remains the same for mitosis. plus, meiosis has two stage of division, unlike mitosis, where it has only one.