Answer:
d) gases that absorb infrared radiation
water vapor, carbon dioxide, methane, and other trace gasses in the Earth's atmosphere absorb the longer wavelengths of outgoing infrared radiation from the Earth's surface.
Answer:
0.034 M
Explanation:
1/[A] = kt + 1/[A]o
[A] = ?
k= 0.04556
t= 10.0 minutes or 600 seconds
[A]o = 0.50 M
1/[A] = (0.04556 × 600) + 1/0.50
[A] = 0.034 M
What experiment are u talking about??
Answer: The vapor pressure of methanol solution at 298K is 107.12 torr
Explanation:
As the relative lowering of vapor pressure is directly proportional to the amount of dissolved solute.
The formula for relative lowering of vapor pressure will be,
![\frac{p^o-p_s}{p^o}=i\times x_2](https://tex.z-dn.net/?f=%5Cfrac%7Bp%5Eo-p_s%7D%7Bp%5Eo%7D%3Di%5Ctimes%20x_2)
where,
= relative lowering in vapor pressure
i = Van'T Hoff factor = 1 (for non electrolytes)
= mole fraction of solute =![\frac{\text {moles of solute}}{\text {total moles}}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%20%7Bmoles%20of%20solute%7D%7D%7B%5Ctext%20%7Btotal%20moles%7D%7D)
Given : 38.5 g of urea is present in 142 g of methanol
moles of solute (urea) = ![\frac{\text{Given mass}}{\text {Molar mass}}=\frac{38.5g}{60g/mol}=0.64moles](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7BGiven%20mass%7D%7D%7B%5Ctext%20%7BMolar%20mass%7D%7D%3D%5Cfrac%7B38.5g%7D%7B60g%2Fmol%7D%3D0.64moles)
moles of solvent (methanol) = ![\frac{\text{Given mass}}{\text {Molar mass}}=\frac{142g}{32g/mol}=4.4moles](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7BGiven%20mass%7D%7D%7B%5Ctext%20%7BMolar%20mass%7D%7D%3D%5Cfrac%7B142g%7D%7B32g%2Fmol%7D%3D4.4moles)
Total moles = moles of solute + moles of solvent = 0.64 + 4.4 = 5.04
= mole fraction of solute =![\frac{0.64}{5.04}=0.127](https://tex.z-dn.net/?f=%5Cfrac%7B0.64%7D%7B5.04%7D%3D0.127)
![\frac{122.7-p_s}{122.7}=1\times 0.127](https://tex.z-dn.net/?f=%5Cfrac%7B122.7-p_s%7D%7B122.7%7D%3D1%5Ctimes%200.127)
![p_s=107.12torr](https://tex.z-dn.net/?f=p_s%3D107.12torr)
Thus the vapor pressure of methanol solution at 298K is 107.12 torr
Yes of course my guy
plz give brainiest