In a ring structure, an unlabeled atom at the angle where two lines join is assumed to be a carbon atom. 2. unlabeled atoms join
ed to carbon atoms, which are not directly part of a ring structure, are assumed to be oxygen atoms.
1 answer:
Ring structure is defined as the structure in which one or more series of compounds are joined or linked to form a ring. Ring can exist in different sizes such as cyclopropane (small ring: three carbon atoms) and cyclohexane (large ring: six carbon atoms).
In ring structure, there is only carbon atoms linked with hydrogen atoms which are identified by the linkage of two lines.
See the attached figure: cyclopropane (unlabelled atoms are carbon atoms with hydogens).
Thus, in ring structure, an unlabelled atom at an angle where two lines joined assumed to be carbon atom.
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Answer:
Covalent
Explanation:
A molecule of C₂H₅OH has C-C, C-H, C-O, and O-H bonds.
A bond between A and B will be ionic if the difference between their electronegativities (ΔEN) is greater than 1.6.
No bond has a large enough ΔEN to be ionic.
C₂H₅OH is a covalent molecule.
Half-life is the time taken for the concentration of the substance to reduce by 50%. The original sample of strontium had a mass of 1.6 gms. Thus, option d is correct.
<h3>What is half-life?</h3>The half-life of any radioactive substance is the time period at which the concentration will get reduced to half the initial amount. The initial mass of Sr-90 is calculated as,
Given,
Quantity of the remaining substance N (t) = 0.40 gm
Initial radioactive substance quantity =?
Time duration (t) = 56 years
Half-life = 28 years
Substituting values above:
= 1.6 gm
Therefore, option d. the initial mass of Sr is 1.6 gm.
Learn more about half-life here:
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