The name come from the German 'Bisemutum' a corruption of 'Weisse Masse' meaning white mass.
Answer:
HBr + H₂SO₄ → SO₂ + Br₂ + H₂O An oxidizing agent is a substance that itself becomes reduced and oxidizes the other chemical species in the reaction mixture. A reducing agent is similar, except that it becomes oxidized and reduces the other substance. In the reaction, the valency of bromine changes from -1 to 0, so it is oxidized
Explanation:
Chlorine-36 has been widely used for dating old groundwater.
Answer:
-1104 kJ/mol
Explanation:
The change in the enthalpy of a reaction is equal to the difference between: the sum of the enthalpy changes of the bonds broken and the sum of the enthalpy changes of the bonds formed.
The bonds broken correspond to the cleavage of bonds of the reactants, the bonds formed correspond to the bonds of the products:
- we only break oxygen O=O bond, since carbon is not bonded to anything;
- we form two C=O bonds in carbon dioxide.
Therefore, the enthalpy change is calculated by:
