Answer:
C. will precipitate out first
the percentage of remaining = 12.86%
Explanation:
Given that:
A solution contains:
From the list of options , Let find the dissociation of
where;
Solubility product constant Ksp of is
Thus;
replacing the known values in order to determine the unknown ; we have :
The dissociation of
The solubility product constant of is
The dissociation of is :
Thus;
Thus; the phosphate anion needed for precipitation is smaller i.e in than in
Therefore:
will precipitate out first
To determine the concentration of when the second cation starts to precipitate ; we have :
This implies that when the second cation starts to precipitate ; the concentration of in the solution is 0.00566
Therefore;
the percentage of remaining = concentration remaining/initial concentration × 100%
the percentage of remaining = 0.00566/0.0440 × 100%
the percentage of remaining = 0.1286 × 100%
the percentage of remaining = 12.86%
Answer:
A is correct...B and C wrong I believe
Explanation:
So basically the reason A should be correct is because all enzymes do is provide alternative mechanisms for reaction to proceed and in that alternative mechanism the activation energy is lowered allowing the reactions to progress at greater speeds.
So A makes sense because The aerodynamic shape of a car, like an enzyme, does not supply energy to the car, but it can make it easier for the car to move (basically like an enzyme the car's shape is allowing the car to move faster... enzymes are not consumed in a reaction; they simply help it to occur.)
B is not correct because enzymes do not provide energy for reaction to occur. All they provide is an alternate mechanism where the activation energy is lowered so the reactions can occur at greater rate.
C is not correct because some reactions can occur without enzymes its just that they will occur at a much slower speed.
Hope this helps! I think this should be correct plz double check with your friends.
Answer:
Balancing chemical equation means making a number of atoms or molecules equal on both sides. In other words, this means that the number of atoms and molecules of each reacting element needs to be the same as the number of atoms and molecules of those elements in the product.
Our reaction is:
AlBr3 + K2SO4 -> KBr + Al2(SO4)3
and we need to balance it.
Since there are 3 molecules of SO4 in the product we need to put 3 before the reactant K2SO4. There are also 2 atoms of Al in the product, so we need to put 2 in front AlBr3. Now we have 6 atoms of K and Br on the left side, so we need to put 6 in front of KBr in the product.
So, our balanced equation will look like this:
2AlBr3 + 3K2SO4 -> 6KBr + Al2(SO4)3
39.948 atoms are in 565 moles of Argon