Answer:
A physical property is an aspect of matter that can be observed or measured without changing it. A chemical property may only be observed by changing the chemical identity of a substance.
Explanation:
i found a table that might be able to help u
Replacement reaction because one element takes place of another element in a compound.
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
