-1 is the oxidation number of Cl
Answer:
Atoms are neither created or destroyed.
Explanation:
The end result of a chemical change does not create or destroy any atoms. Matter cannot be created or destroyed, meaning the same amount of atoms exist before and after the change.
Given :
Volume of stock solution, .
Volume of diluted solution, .
Molarity of diluted solution, .
To Find :
The concentration of the stock solution.
Solution :
We know, dilution factor is given by :
....1)
and ....2)
Putting volume in above equation, we get :
D.F = 400/20
D.F = 20
Putting value of D.F in equation 2) we get :
The concentration of stock solution is nearest to 30 M.
Therefore, the correct option is 1) 30 M.
You can find carbon by itself or with other naturally occurring compounds, in all organic compounds (carbohydrates and nucleic acids), and in every living thing
Answer:
2.56 L NiCl2
Explanation:
This is a stoichiometry problem. You need to find a way to go from g of Ni3(PO4)2 to L of NiCl2. To do this you travel
mass Ni3(PO4)2 > moles Ni3(PO4)2 > moles NiCl2 > L NiCl2
so you need to know the key that lets you travel from one to the next.
Mass > moles, use molar mass
moles > moles, use the mole ratio
moles > L, use the molarity (moles / liter) in this case. (With gases, you use the STP gas volume of 22.4L / mole).
The attached picture shows what this problem looks like.