¿ cuál es la pregunta que intentas hacer?
Yes, it is. The pencil is still composed of wood and graphite before and after the break, although the physical form is different, of course. If you wanted a comparison, burning the pencil would be a chemical change.
Answer:
of the stock solution would be required.
Explanation:
Assume that a solution of volume contains a solute with a concentration of . The quantity of that solute in this solution would be:
.
For the solution that needs to be prepared, . The volume of this solution is . Calculate the quantity of the solute (magnesium chloride) in the required solution:
.
Rearrange the equation to find an expression of volume , given the concentration and quantity of the solute:
.
Concentration of the solute in the stock solution: .
Quantity of the solute required: .
Calculate the volume of the stock solution that would contain the required of the magnesium chloride solute:
.
Answer:
Explanation:
Given
Required
Determine the percentage error
First, we need to determine the difference in the measurement
The percentage error is calculated as thus:
<em>approximated</em>
I a chemical reaction, we have the reactants in the left part,followed by an arrow and then the products.
So, the reactants are the two that are in the left part of the equation:
Sodium hydroxide and Hydrochloric acid