Answer: a. The elements iron in the nail and oxygen from the air combine to form the compound rust.
Iron, Fe: is an element
Oxygen, O: is an element
Rust, Fe3O4: this formula identifies the product as a compound
The mole fraction of KCl = 0.105
<h3>Further explanation</h3>
Given
%w/w KCl = 32.7
Required
the mole fraction of KCI
Solution
For 100 g solution : KCl = 32.7 g, H₂O = 67.3 g
mol KCl :
![\tt \dfrac{32.7}{74.55~g/mol}=0.439](https://tex.z-dn.net/?f=%5Ctt%20%5Cdfrac%7B32.7%7D%7B74.55~g%2Fmol%7D%3D0.439)
mol H₂O :
![\tt \dfrac{67.3}{18.016}=3.74](https://tex.z-dn.net/?f=%5Ctt%20%5Cdfrac%7B67.3%7D%7B18.016%7D%3D3.74)
total mol of solution = 0.439+3.74=4.179
mol fraction of KCl :
![\tt \dfrac{0.439}{4.179}=0.105](https://tex.z-dn.net/?f=%5Ctt%20%5Cdfrac%7B0.439%7D%7B4.179%7D%3D0.105)
And "if/then" statement.
Ex. IF I add this amount of water to my plant everyday, THEN it will grow into a healthy plant.
Answer:
A law that states that at constant temperature, the volume of a fixed amount of a gas is inversely proportional to its pressure. A law that states that at constant temperature and pressure, the volume of a sample of gas is directly proportional to the number of moles of gas in the sample.
Explanation:
14 as well. A neutral atom has just as many protons in its nucleus and electrons it is electronic shells.