Answer:
Ca(C2H3O2)2 + H2O
Explanation:
is the right answer on edg
Explanation:
Given the mass of HCl is ---- 0.50 g
The volume of solution is --- 4.0 L
To determine the pH of the resulting solution, follow the below-shown procedure:
1. Calculate the number of moles of HCl given by using the formula:
![number of moles of a substance=\frac{given mass of the substance}{its molecular mass}](https://tex.z-dn.net/?f=number%20of%20moles%20of%20a%20substance%3D%5Cfrac%7Bgiven%20mass%20of%20the%20substance%7D%7Bits%20molecular%20mass%7D)
2. Calculate the molarity of HCl.
3. Calculate pH of the solution using the formula:
![pH=-log[H^+]](https://tex.z-dn.net/?f=pH%3D-log%5BH%5E%2B%5D)
Since HCl is a strong acid, it undergoes complete ionization when dissolved in water.
![HCl(aq)->H^+(aq)+Cl^-(aq)](https://tex.z-dn.net/?f=HCl%28aq%29-%3EH%5E%2B%28aq%29%2BCl%5E-%28aq%29)
Thus, ![[HCl]=[H^+]](https://tex.z-dn.net/?f=%5BHCl%5D%3D%5BH%5E%2B%5D)
Calculation:
1. Number of moles of HCl given:
![number of moles of a substance=\frac{given mass of the substance}{its molecular mass}\\=0.50g/36.5g/mol\\=0.0137mol](https://tex.z-dn.net/?f=number%20of%20moles%20of%20a%20substance%3D%5Cfrac%7Bgiven%20mass%20of%20the%20substance%7D%7Bits%20molecular%20mass%7D%5C%5C%3D0.50g%2F36.5g%2Fmol%5C%5C%3D0.0137mol)
2. Concentration of HCl:
![Molarity of HCl=\frac{number of moles of HCl}{its molar mass}\\=\frac{0.0137 mol}{4.0 L} \\= 0.003425 M](https://tex.z-dn.net/?f=Molarity%20of%20HCl%3D%5Cfrac%7Bnumber%20of%20moles%20of%20HCl%7D%7Bits%20molar%20mass%7D%5C%5C%3D%5Cfrac%7B0.0137%20mol%7D%7B4.0%20L%7D%20%5C%5C%3D%200.003425%20M)
3. pH of the solution:
![pH=-log[H^+]\\=-log(0.003425)\\=2.47](https://tex.z-dn.net/?f=pH%3D-log%5BH%5E%2B%5D%5C%5C%3D-log%280.003425%29%5C%5C%3D2.47)
Hence, pH of the given solution is 2.47.
First of all, you have to compare the two instances. So if 1000g makes 1kg. Then how many grammes will make 4kg
1000g=1kg
x=4kg.
I represented the unknown with (x)
So you make 1 multiply x and 4 multiply 1000
1x=1000x4
1x=4000
1x is the same as x. So
x=4000g
Which is A. Hope I helped.
The heat that creates this temperature change coming from change in the internal energy of the system as per as first law of thermodynamics.
<h3>What is Boyle's law ?</h3>
A law stating that the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature.
As we know, Boyle's law only works when the gas is kept at a constant temperature
Here,
When volume of gases decreased, it means work done has occurred on the system, so the work done is used for raising internal energy of the gas and the other is released as the thermal energy.
So,
According to 1st law of thermodynamics,
we know Q = ΔU + W i.e, change in internal energy and work done. So this is a reason. Changing temperature occurs.
Learn more about Internal enrgy here ;
brainly.com/question/11278589
#SPJ1
Answer:
Homogeneous: milk, lotion, window cleaner, glue
Heterogeneous: milk and cereal
, sugar and salt
, water and oil
, rice and beans
Explanation: