Answer:
When you balance a chemical equation, you change coefficients. You never change subscripts. A coefficient is a whole number multiplier. To balance a chemical equation, you add these whole number multipliers (coefficients) to make sure that there are the same number of atoms on each side of the arrow.
Explanation:
Answer:
A sentence is something that you can type up.
For example: I saw a dog that was hungry and needed something to drink so I took it home gave it some water and some food.
I typed this up and did not look it up.
Explanation:
Answer:
density of a piece of metal = 7 gr/ml
Explanation:
See the file please
Answer
20.18
Explanation:
The atomic mass of X is the <em>weighted average</em> of the atomic masses of its isotopes.
We multiply the atomic mass of each isotope by a number representing its <em>relative importance</em> (i.e., its percent of the total).
Set up a table for easy calculation
0.9048 × 19.99 u = 18.087 u
0.0027 × 20.99 u = 0.0567 u
0.0925 × 21.99 u = <u>2.0341 u
</u>
TOTAL = 20.18 u
Answer : The mathematical relationships gives the pOH of pure water at is,
Explanation :
As we are given that the pH at is, 6.6.
Now we have to determine the mathematical relationships gives the pOH of pure water at .
As we know that:
The ionization of water is:
The expression for dissociation constant for water is:
taking logarithm on both side, we get:
Taking negative sign on both side, we get:
As we know that the value of is 14 at 25-50°C.
So,
or,
Therefore, the mathematical relationships gives the pOH of pure water at is,