Materials<span> and their </span>properties<span>: </span>compounds like<span> sodium chloride - an interactive educational resource for 11 to 14 year olds. ... Elements are substances (</span>like<span> hydrogen and oxygen) that can't be split into simpler substances. ... For </span>each<span> statement, decide whether it describes a mixture or a </span>compound<span> and check the box.</span>
Answer:
C nhé ! CH3COOH là axit chứ không phải este
Answer:
![2.22~g/L](https://tex.z-dn.net/?f=2.22~g%2FL)
Explanation:
According to the ideal gas law equation:
![pV = nRT](https://tex.z-dn.net/?f=pV%20%3D%20nRT)
Let's express the number of moles in terms of mass and molar mass:
![pV = \frac{m}{M} RT](https://tex.z-dn.net/?f=pV%20%3D%20%5Cfrac%7Bm%7D%7BM%7D%20RT)
Let's divide both sides by volume:
![p = \frac{m}{MV} RT](https://tex.z-dn.net/?f=p%20%3D%20%5Cfrac%7Bm%7D%7BMV%7D%20RT)
Notice that:
![\frac{m}{V} = d](https://tex.z-dn.net/?f=%5Cfrac%7Bm%7D%7BV%7D%20%3D%20d)
So the equation becomes:
![p = \frac{dRT}{M}](https://tex.z-dn.net/?f=p%20%3D%20%5Cfrac%7BdRT%7D%7BM%7D)
Expressing density:
![d = \frac{pM}{RT}](https://tex.z-dn.net/?f=d%20%3D%20%5Cfrac%7BpM%7D%7BRT%7D)
Substituting the given values:
![d = \frac{2.569~atm\cdot 32.49~g/mol}{0.08206~\frac{L~atm}{mol~K}\cdot 458~K} = 2.22~g/L](https://tex.z-dn.net/?f=d%20%3D%20%5Cfrac%7B2.569~atm%5Ccdot%2032.49~g%2Fmol%7D%7B0.08206~%5Cfrac%7BL~atm%7D%7Bmol~K%7D%5Ccdot%20458~K%7D%20%3D%202.22~g%2FL)
Ph = A
Acid = C
Base = D
Litmus paper = B
Term = ?