Answer:
When you heat ice, the individual molecules gain kinetic energy, but until the temperature reaches the melting point, they don't have energy to break the bonds that hold them in a crystal structure. They vibrate more quickly within their confines as you add heat, and the temperature of the ice goes up.
Ideal gas law: PV = nRT
P-pressure
V-volume
n-number of moles(m/M)
R-constant
T- temperature
State given info:
V=10L
T=298k
P=203kPa
R=8.31(only for kPa, for pressure at atm use 0.08206)
Sub in:
(203kPa)(10L)=n(8.31)(298)
Rearrange:
n= (203)(10) / (8.31)(298)
n = 0.819745mol in gas sample
HCI are less soluble in water as the temperature of the solution is increased.
Answer:
22.96 $ per 1 g of gold
Explanation:
We know that 1 g is equal to 0.035 oz.
Now we formulate the following reasoning:
if 1 oz of gold have a value of 655 $
then 0.035 oz of gold have a value of X $
X = (0.035 × 655) / 1 = 22.96 $
Answer:
Explanation:
Considering the Henderson- Hasselbalch equation for the calculation of the pH of the acidic buffer solution as:
![pH=pK_a+log\frac{[salt]}{[acid]}](https://tex.z-dn.net/?f=pH%3DpK_a%2Blog%5Cfrac%7B%5Bsalt%5D%7D%7B%5Bacid%5D%7D)
Given that:-
[Acid] = 0.12 M
Volume = 3.0 L
pKa = 3.74
pH = 5.30
So,
![5.30=3.74+log\frac{[sodium\ formate]}{0.12}](https://tex.z-dn.net/?f=5.30%3D3.74%2Blog%5Cfrac%7B%5Bsodium%5C%20formate%5D%7D%7B0.12%7D)
Solving, we get that:-
[Sodium formate] = 4.36 M
Considering:
So,
So, Moles of sodium formate = 4.36*3.0 moles = 13.08 moles
Molar mass of sodium formate = 68.01 g/mol
The formula for the calculation of moles is shown below:
Thus,
