I believe the statement given above is true. When solid mercury (ii) nitrate is being heated, a decomposition reaction happens. The solid would decompose into 3 different substances - solid mercury (ii) oxide, gaseous nitrogen dioxide, and oxygen. The balanced chemical reaction would be written as:
2Hg(NO3)2 = 2HgO + 4NO2 +O2
<span>Decomposition reaction is a type of reaction
where it involves a single compound breaking down into two or more products.
These reactions often requires an energy source thus it is an endothermic
reaction. This is evident for this reaction since we supplied heat to the reactant for the reaction to proceed.</span>
<span>The best answer among
the choices is the first option. The chemical property of soda is that it is a
highly basic substance. It's chemical name is sodium carbonate. It is more
basic than sodium bicarbonate. Adding soda ash in a solution would increase the
pH of the solution.</span>
PH is the test of acidity or basicity of a solution. it follows the formula:
pH = pKa + log [salt] / [acid] where NaF is the salt and HF is the acid in this case.
By literature, Ka of HF is 3.5*10^-4
<span>pKa= -log(Ka)=</span><span> 3.46 </span>
<span>pH = pKa + log [NaF / [HF] </span>
4.05 = 3.46 + log [NaF / [HF]
log [NaF / [HF]<span> = 0.59
</span>
[NaF / [HF] = 3.89
The Nuclear Model-1909. Ernest Rutherford's great contribution to atomic theory was to show what happens to an element during radioactive decay. This enabled him to construct the first nuclear model of the atom, a cornerstone of present-day physics The Nuclear Model-1909.
Please list the answers so I can answer this question.