Answer:
C
Explanation:
C. It is considered a cooling process and it lowers the average kinetic energy of the liquid because the higher energy molecules turn to vapor.
Moreso, evaporation does not increase the average kinetic energy because it is a surface phenomenon. Also, as molecules excape at a fast moving rate, the left over molecules have a lower kinetic energy and this consequently decreases the temperature of the liquid.
When molecules absorbs heat, the evaporate and this phenomental process provides cooling in the system
Answer:
Percent composition is calculated from a molecular formula by dividing the mass of a single element in one mole of a compound by the mass of one mole of the entire compound.
Explanation:
(happy to help)
Exothermic is the release of heat. Exo as in exit to leave and thermos, the Greek word for heat. Endothermic is the absorption of heat. So if a chemical reaction is exothermic the reaction loses heat and it feels warm to you. If it is endothermic, it absorbs heat. If you are holding a beaker with an endothermic reaction, it will absorb the heat from you and therefore these re
actions feel cool to touch!
Solubility<span> is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent. It has units of grams of the substance per grams of solvent. We calculate the mass as follows:
311 g AgNO3 / 100 g water (350 g water) = 1088.5 g AgNO3
It can be rounded of to 1100 g of AgNO3. Therefore, option B is the correct answer.</span>
Scientist believe that about 25 of the known elements are essential to life. Just four of these - Carbon (C), Oxygen (O), Hydrogen (H), and Nitrogen (N), - make up about 96% of the human body.
These four elements are found in the basic structure of all biochemical molecules. For example, Glucose is a carbohydrate and it's molecular formula is C6H12O6 - each molecule of glucose is made up of 6 Carbon atoms, 12 Hydrogen atoms and 6 oxygen atoms.
The other elements found can be divided into two main groups - major elements and trace elements.
The human body functions as a result of a large number of the chemical reactions involving compounds of a of these elements.
