The answer is covalent bonding feel free to message me if you want to understand why this is the correct answer :)
You can find the oxidation number of a certain element in a compound if you add up their oxidation numbers to the net charge. This is just a simple algebraic equation. Let x be the oxidation number of Cr. Since the compound is neutral, the net charge is 0. Thus,
oxidation number for Li: +1
Oxidation number of O: -2
0 = 2(+1) + x + 4(-2)
Solving for x,
x = +6
<em>Thus, the oxidation number of Cr is +6.</em>
Answer:
Tissue level of organization
Explanation:
The various levels of the organization of life are as follows:
Cells: a cell is the basic unit of ife
Tissues; A tissue is a group of cells with a common origin. performing similar functions.
Organ: an organ is a group of tissues with varied or similar function that work together to perform a specific function.
System: a system is a group of different organs that work together in the body to perform a specific function.
Since, the leaf is an organ in the plant that performs the function of photosynthesis, the group of dermal cells found on the leaf are in the tissue level of organization, they perform the function of protection for the leaf.
Molecular chemical equation:
K₂C₂O₄(aq)+Pb(OH)₂(aq) → 2KOH(aq) + PbC₂O₄<span>(s).
Ionic equation:
2K</span>⁺(aq) + C₂O₄²⁻(aq) + Pb²⁺(aq) + 2OH⁻(aq) → 2K⁺(aq) +2OH⁻(aq)+PbC₂O₄(s)
Net ionic eqation:
C₂O₄²⁻(aq) + Pb²⁺(aq) → PbC₂O₄(s).
s is solid, do not dissolve in water, potassiom hydroxide is trong base and dissolves in water.
He disproved that living cells come from non living things