Answer:
The nitrogen atom shares three bonding pairs and has one lone pair and has a total of 5 valence electrons.
Explanation:
Nitrogen - in its molecular elemental form, has an oxidation number of 0.
Decomposition reaction results in the formation of the products by splitting the reactants. Moles of mercury(ii) oxide needed are 15.63 moles.
<h3>What are moles?</h3>
Moles are the ratio of mass and the molar mass of the compound or the molecule.
Moles of oxygen are calculated as:
The balanced chemical reaction can be shown as,
From the reaction, it can be said that 1 mole of oxygen requires 2 moles of mercury oxide.
Moles of mercury oxide are calculated as:
Therefore, option C. 15.63 moles of mercury (II) oxide is needed.
Learn more about moles here:
brainly.com/question/26898237
Answer:
97200yrs,
Explanation:
Given parameters:
Half-life of Plutonium - 239 = 24300yrs
Mass of the isotope = 8kg
Unknown:
Number of years it will take for the amount to reduce to 1kg = ?
Solution:
The half -life of any substance is the time taken for half of the compound to decay to half its original composition.
<em> Start first half life second half life third half life</em>
mass 8kg 4kg 2kg 1kg
Time 0yrs 24300 48600 97200
By 97200yrs, the mass would have been 1kg
Answer:
Biochemistry focuses on the studies of biological matter. ... Medical biochemistry seeks to advance the understanding of chemical structures and processes that constitute health and disease, and underlie transformations between these two states.