Answer:
0.51M
Explanation:
Given parameters:
Initial volume of NaBr = 340mL
Initial molarity = 1.5M
Final volume = 1000mL
Unknown:
Final molarity = ?
Solution;
This is a dilution problem whereas the concentration of a compound changes from one to another.
In this kind of problem, we must establish that the number of moles still remains the same.
number of moles initially before diluting = number of moles after dilution
Number of moles = Molarity x volume
Let us find the number of moles;
Number of moles = initial volume x initial molarity
Convert mL to dm³;
1000mL = 1dm³
340mL gives = 0.34dm³
Number of moles = initial volume x initial molarity = 0.34 x 1.5 = 0.51moles
Now to find the new molarity/concentration;
Final molarity = = = 0.51M
We can see a massive drop in molarity this is due to dilution of the initial concentration.
Answer:
mineral acids are obtained from one or more inorganic compounds which is a compound that lacks carbon and hydrogen bonds. Inorganic compound examples include water and carbon dioxide. Something all mineral acids do is form hydrogen ions and the joined together bases when it is dissolved in water.
Explanation:
Answer:
Here's what I get
Explanation:
(a) Plot I against t
I assume that Equation 22.40 is something like
If the initial conditions are
[A]₀ = 1.0 mol·dm⁻³; k₁ = 10 s⁻¹; k₂ = 1 s⁻¹
The equation becomes
The graph of [I] vs t is shown in Fig 1.
(b) Increasing k₂/k₁ ratio
In Fig. 2, I added the same plots, but with k₂ = 3, 11, and 51 s⁻¹ (black, green and purple).
The graphs show that, as k₂ becomes increasingly greater than k₁, the maximum concentration of I becomes smaller and the graph becomes (except for the very beginning) a flat line.
Thus, the approximation that
becomes increasingly valid.
Ad 1) - it's the number of protons. Incidentally, this is also the answer to the second question: the number of protons, counted as the atomic number is what distinguishes the elements.
Different isotopes of the same element have the same amount of protons but a different number of neutrons, which gives them a different atomic mass.
So: b), b), d)
Answer:
The mixture has no fixed composition.
To form a mixture energy is neither produced nor evolved.
The mixture has no fixed melting points and boiling points.
the Mixture retains the properties of its components.
Components of mixtures can be separated by simple physical methods.