Answer:
B. Chemical changes produce new substances; physical changes do not.
Explanation:
Physical changes only alter appearances, while chemical changes are interactions that create new chemical formulas.
Answer:
Explanation:
Stereoisomers are two or more atoms that have the same bonding order of atoms but there is a difference spatial arrangement of the atoms in space.
A plane of symmetry divides a molecule into two equal halves.
A chiral stereoisomer are not superimposed on a mirror image , Hence they do not posses a plane of symmetry.
As a result to that. these non-superimposable mirror images are said to be Enantiomers.
However, a Fischer Projection emanates from a two - dimensional figure which is used for presenting a three - dimensional organic molecules.
From the given question;
Fischer projection for an enantiomer of 2-bromo-2,3-dihydroxypropanal with the bromine oriented horizontally to the left and the hydroxide group oriented horizontally to the right.
we can sketch the way the enantiomer of 2-bromo-2,3-dihydroxypropanal can be seen like the one shown below:
CH₂OH
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Br -------------|----------------OH
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CHO
The objective of this question is to drawn the perspective formula of the molecule.
So , from the attached file below; we can see the perspective formula of the molecule in a well structured 3-D format.
Answer:
Essentially, a control variable is what is kept the same throughout the experiment, and it is not of primary concern in the experimental outcome. Any change in a control variable in an experiment would invalidate the correlation of dependent variables (DV) to the independent variable (IV), thus skewing the results.
Answer:
The correct answer is: <u><em>"The ethanol will evaporate first"</em></u>
Explanation:
Fractional distillation is a physical process used to separate various liquid mixtures in which liquids have nearby boiling points. In other words, both compounds are volatile (volatility is the property of evaporating, moving from the liquid to the gaseous state).
The process consists in heating the liquid mixture to be separated. Upon reaching the boiling temperature of the most volatile component (with a lower boiling point) a vapor phase will be formed, which will mostly contain this substance at the beginning.
Then, as the temperature continues to rise and as time goes by, multiple evaporation and condensation cycles continuously occur (each cycle is known as the "theoretical plate"), until the lower boiling constituent first emerges, that is, It will separate.
In this case, since ethanol is the element with the lowest boiling point, it will be the most volatile and will separate first. So <u><em>the correct answer is: "The ethanol will evaporate first"</em></u>
Answer:
Explanation:
The relation between standard Gibbs energy and equilibrium reaction is shown below as:
R is Gas constant having value = 0.008314 kJ / K mol
Given temperature, T = 300 K (Source Original)
Given,
So,
Also,
K₁ = 10*K₂
K₂ = 0.1 K₁
So,