Sodium chloride molecules are cubical. The large chloride ions are closely packed together, with smaller sodium ions filling in the spaces between them. Not only do we need to consume salt, we also need it for a variety of nonfood uses. But if it's so important, why do health ...
The lipid bilayer molecules do what for the cell? Does the mucous membrane have goblet cells? How does sugar or protein enter the matrix if the inner membrane of the mitochondria is impermeable? What is the structure of glucose? Are viroids cellular or noncellular? Animals store glucose in th...
Explain why network solids have high melting points. Why are amorphous solids called supercooled liquids? Why is melting a physical change? Why does water expand when it goes from a liquid to a solid? Why do molecules in solids not diffuse into one another?
Why does the vapor pressure of water decrease when NaCl is added to it? Why does I_2 have a higher boiling point than F_2? Explain how to find the boiling point of the following: a) HF b) CO c) BaCl_2 Explain why all of a pure solution does not vaporize at once when the boil...
Copper: Copper is one of Earth's elements. It is identified on the periodic table of elements with the atomic symbol 'Cu' and the atomic number '29.' The word 'copper' is derived from the Latin wordcuprumwhich is why its symbol is 'Cu.' ...
Research has also shown that even when NaCl was replaced with, for instance, KCl (potassium chloride), the salty taste was detected, albeit to a lower extent. This suggests that there is another type of receptor for salt that allows the detection of other salt molecules, as ENaCs can only...
Even chemically pure, neutral water contains hydrogen ions due to the autodissociation of water [1]. In this process, water molecules are broken up into simpler constituents (i.e. ions). [1] H2O ⇔ H++ OH- In this reaction, H2O is deprotonated (i.e. loses a proton). This results...
Why is the ionic compound NaCl (table salt) able to dissolve in a glass of the molecular compound water (H_2O)? A student has two bowls of water, one of which has 2tsp of salt in it. They then placed an ice cube in both bowls, but the one without salt melted faster. Explain...
Why is it important that some molecules diffuse freely across the membrane? Fill in the blank with correct word/s. In passive diffusion, solute molecules cross the membrane as a result of \rule{1in}{.2mm}. Why is diffusion not always able to meet the ion or mo...
Metallic bonding is one of the three types of bonds that form between atoms to create molecules. This type of bonding forms between two metal atoms, regardless of the type of metal. Ionic bonding forms between a metal atom and a non-metal atom. Covalent bonding forms between two non-metal...