Answer:
See explaination
Explanation:
Please kindly check attachment for the step by step solution of the given problem
The initial balanced equation of decomposition is:
2NaN3 —> 2Na + 3N2
Since 1 mole of a gas occupies 24dm^3 at room temperature and pressure:
72dm^3 / 24dm^3 = 3 moles of Nitrogen which required 2 moles of Sodium Azide.
Since moles = mass/Relative molecular mass or molar mass
2 moles x 65~ g/mol = 130g
For the empirical formula:
Element H N
% Mass 2.33% 97.7%
Mass/Mr 2.33 6.97
2.33 7~
Divide by lowest number
1 3
Therefore empirical formula is
H1N3
Explanation:
0.00191 moles AlCl3 X 3 chlorides/mole of AlCl3 = 0.00573 moles of chloride.
Answer:
No one is reduced.
Explanation:
It is an example oxidation reaction in which carbon is oxidised to form carbon dioxide.
Preparing 15 mg/gl working standard solution from a 20 mg/dl stock solution will require the application of the dilution principle.
Recalling the principle:
initial volume x initial molarity = final volume x final molarity
Since we were not given any volume to work with, we can as well just take an arbitrary volume to be prepared. Let's assume that the stock solution is 10 mL and we want to prepare 15 mg/gl from it:
Applying the dilution principle:
10 x 20 = final volume x 15
final volume = 200/15
= 13.33 mL
This means that in order to prepare 13.33 mL, 15 mg/l working standard solution from 10 ml, 20 mg/dl stock solution, 3.33 mL of the diluent must be added to the stock solution.
More on dilution principle can be found here: brainly.com/question/11493179
