Answer:
The volume of container is <em>39.14 L.</em>
Explanation:
Given data:
Number of moles of neon = 4.0 mol
Pressure of gas = 2.5 atm
Temperature of gas = 25°C
Volume of container = ?
Solution:
we will use general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will convert the temperature.
25+273 = 298 K
Now we will put the values in formula.
2.5 atm × V = 4.0 mol × 0.0821 atm.L/ mol.K × 298 K
V = 97.86 atm.L /2.5 atm
V = 39.14 L
The volume of container is 39.14 L.
Answer: 0.39 moles NaPO4
Explanation: Solution: 1 mole of NaPO4 is equal to its molar mass 118g NaPO4
45.8 g NaPO4 X 1 mole NaPO4/ 118 g NaPO4
= 0.39 moles NaPO4
Answer:
A. NaHCO₃
Explanation:
NaHCO₃ ⇒ NaOH + H₂CO₃
NaOH is a strong base and H₂CO₃ is a weak acid. Therefore, NaHCO₃ is a salt of a strong base-weak acid reaction. The salt is basic because carbonic acid (H₂CO₃) is a weak acid so it remains undissociated. So, there is a presence of additional OH⁻ ions that makes the solution basic.
Hope that helps.
Answer:
Keq=0.866
Explanation:
Hello,
In this case, the undergone chemical reaction is:
![N_2O_42NO_2](https://tex.z-dn.net/?f=N_2O_4%3C-%3E2NO_2)
In such a way, since 0.0055 mol of N₂O₄ remains in the flask, one infers that the reacted amount (
) was:
![x=0.04mol-0.0055mol=0.0345mol](https://tex.z-dn.net/?f=x%3D0.04mol-0.0055mol%3D0.0345mol)
In addition, the produced amount of NO₂ is:
![2*0.0345mol=0.069mol](https://tex.z-dn.net/?f=2%2A0.0345mol%3D0.069mol)
Finally, considering the flask's volume, the equilibrium constant is then computed as follows:
![Keq=\frac{(2*0.0345M)^2}{0.0055M}=0.866](https://tex.z-dn.net/?f=Keq%3D%5Cfrac%7B%282%2A0.0345M%29%5E2%7D%7B0.0055M%7D%3D0.866)
Best regards.
Answer:
B) sand
Explanation:
A) Oil is a wrong choice because it is a liquid not a solid and also if it is oil, it will float over the water surface as a droplets.
B) Sand is the right choice, because sand is a solid and it does not dissolve in water and stabilizes at the bottom.
C) Sugar is a wrong choice, because small amount of sugar will dissolve in water and be a homogeneous solution and does not appear as a particles.
D) Wood ships is also a wrong choice, even it is a solid and does not dissolve in water, but it will float over the water surface.