Answer:
Calcite
Explanation:
The chart shows that calcite is higher than gypsum, but is lower than apatite. Therefore meaning that it can scratch gypsum But not able to the same to apatite.
Explanation:
On one side , there is high concentration of potassium ion and chloride ions. And on other sides high concentration of sodium ions and phosphate ions.
![[K^+][Cl^-]|[Na^+][PO_2^{-}]](https://tex.z-dn.net/?f=%5BK%5E%2B%5D%5BCl%5E-%5D%7C%5BNa%5E%2B%5D%5BPO_2%5E%7B-%7D%5D)
Cell is permeable only to chloride ions.As we can see that chloride ions are only present on the outside of cell .
As we know solute particles move from higher concentration to lower concentration side that is to equalize the concentration of solute particles on both sides. So, chloride ion will move inside the cell until the concentration of chloride ions become equal on both the sides which will result in swelling up of cell.
Answer:
The extraction is done by electrolysis. The ions in the aluminum oxide must be free to move so that electricity can pass through it. Aluminum oxide has a very high melting point (over 2000°C) so it would be expensive to melt it. Aluminum oxide does not dissolve in water, but it does dissolve in molten cryolite.
Explanation:
Answer:
Because frequency and wavelength are related by a constant (c) the energy can also be written in terms of wavelength: E = h · c / λ.
Answer: The answer is C. A mercury thermometer is better to measure very small changes in temperature.
Explanation:
i took this quiz and this is the answer .
A) A mercury thermometer can measure the freezing point of a liquid that freezes at −80 °C.
B) An alcohol thermometer can measure the boiling point of a liquid that boils at 80 °C.
C) A mercury thermometer is better to measure very small changes in temperature.
D) An alcohol thermometer is better to measure the boiling points of colorless liquids.