Answer:
As the molecules of a liquid are cooled they slow down. As the molecules slow down they take up less volume. Taking up less room because of the molecules lower energy causes the liquid to contract.
Explanation:
The density of marble is between 2.6 and 2.8 grams per cm³ .
Density doesn't depend on how much mass or volume of it you have.
The density of a chip of it is the same as the density of a truckload of it.
Answer:
![d=0.92\frac{kg}{m^{3}}](https://tex.z-dn.net/?f=d%3D0.92%5Cfrac%7Bkg%7D%7Bm%5E%7B3%7D%7D)
Explanation:
Using the Ideal Gas Law we have
and the number of moles n could be expressed as
, where m is the mass and M is the molar mass.
Now, replacing the number of moles in the equation for the ideal gass law:
![PV=\frac{m}{M}RT](https://tex.z-dn.net/?f=PV%3D%5Cfrac%7Bm%7D%7BM%7DRT)
If we pass the V to divide:
![P=\frac{m}{V}\frac{RT}{M}](https://tex.z-dn.net/?f=P%3D%5Cfrac%7Bm%7D%7BV%7D%5Cfrac%7BRT%7D%7BM%7D)
As the density is expressed as
, we have:
![P=d\frac{RT}{M}](https://tex.z-dn.net/?f=P%3Dd%5Cfrac%7BRT%7D%7BM%7D)
Solving for the density:
![d=\frac{PM}{RT}](https://tex.z-dn.net/?f=d%3D%5Cfrac%7BPM%7D%7BRT%7D)
Then we need to convert the units to the S.I.:
![T=100^{o}C+273.15](https://tex.z-dn.net/?f=T%3D100%5E%7Bo%7DC%2B273.15)
![T=373.15K](https://tex.z-dn.net/?f=T%3D373.15K)
![P=1bar*\frac{0.98atm}{1bar}](https://tex.z-dn.net/?f=P%3D1bar%2A%5Cfrac%7B0.98atm%7D%7B1bar%7D)
![P=0.98atm](https://tex.z-dn.net/?f=P%3D0.98atm)
![M=28.9\frac{kg}{kmol}*\frac{1kmol}{1000mol}](https://tex.z-dn.net/?f=M%3D28.9%5Cfrac%7Bkg%7D%7Bkmol%7D%2A%5Cfrac%7B1kmol%7D%7B1000mol%7D)
![M=0.0289\frac{kg}{mol}](https://tex.z-dn.net/?f=M%3D0.0289%5Cfrac%7Bkg%7D%7Bmol%7D)
Finally we replace the values:
![d=\frac{(0.98atm)(0.0289\frac{kg}{mol})}{(0.082\frac{atm.L}{mol.K})(373.15K)}](https://tex.z-dn.net/?f=d%3D%5Cfrac%7B%280.98atm%29%280.0289%5Cfrac%7Bkg%7D%7Bmol%7D%29%7D%7B%280.082%5Cfrac%7Batm.L%7D%7Bmol.K%7D%29%28373.15K%29%7D)
![d=9.2*10^{-4}\frac{kg}{L}](https://tex.z-dn.net/?f=d%3D9.2%2A10%5E%7B-4%7D%5Cfrac%7Bkg%7D%7BL%7D)
![d=9.2*10^{-4}\frac{kg}{L}*\frac{1L}{0.001m^{3}}](https://tex.z-dn.net/?f=d%3D9.2%2A10%5E%7B-4%7D%5Cfrac%7Bkg%7D%7BL%7D%2A%5Cfrac%7B1L%7D%7B0.001m%5E%7B3%7D%7D)
![d=0.92\frac{kg}{m^{3}}](https://tex.z-dn.net/?f=d%3D0.92%5Cfrac%7Bkg%7D%7Bm%5E%7B3%7D%7D)