Hey there!:
HCl + MnO2 → MnCl2 + H2O + Cl2
* in HCl the oxidation state of Cl is -1 .
* on the product side the oxidation state is 0 .
* therefore Cl gains electrons .
* in MnO2 the oxidation state of Mn is +4
* in MnCl2 the oxidation state of Mn is +2
Therefore Mn loses electrons
Answer A
Hope That helps!
Given mass of solute = 340 gram
Molar mass of solute(MgBr2) = 184 g
Number of moles = Given mass / Molar mass = 340 / 184 = 1.85 moles
Now, Molarity = Number of moles / solution (in litres)
So, M = 1.85 / 8
M = 0.23 M
In short, Your Molarity would be: 0.23 M
Hope this helps!
Answer:
Explanation:
Carbon disulphide is the liquid that can be used to separate iron fillings and sulphur powder.
When carbon disulphide is poured into the dish, the sulphur powder gets easily dissolved in the carbon disulfide. The iron fillings are left to settle on the bottom of the dish.
The iron fillings can get seperated through filtration. When the mixture of sulphur powder and carbon disulphide gets completely evaporated, the sulphur powder is left over.
Pure substances cannot be separated into any other kinds of matter while a mixture is a combination of two or more pure substances
A pure substance has constant physical and chemical properties while mixtures have varying physical and chemical properties
The atoms are different by prime difference lies in the fact that pure substances cannot by physically separated while mixtures can be (physical methods)