Answer: Option (d) is the correct answer.
Explanation:
An oxidizing agent is defined as the substance that itself gains an electron and helps in oxidation of another substance.
For example,
Here, is the oxidizing agent.
Also, a substance with more positive value of electrode potential will be the strongest oxidizing agent. Whereas a substance with more negative value of electrode potential will be the strongest reducing agent.
Therefore, out of the given options has the highest positive value of electrode potential so, is the strongest oxidizing agent.
Answer: 3 significant figures
Explanation: because in scientific notation only the before and after decimal number are considered but in standard form all numbers including exponents are all significant figures
Above question is incomplete. Complete question is attached below
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Correct Answer:
Option D i.e. CH3CH2CH2CH2CH3
Reason:
Isomers are the compounds having same molecular formula, but different structural formula.
The molecular formula of the compound is C5H12
The compound present is question (i.e. 2-methyl butane) and option D (n-pentane) has same molecular formula. Hence, they are isomers.However, compound present in option A, is the same compound provided in question. Hence, it is not an isomer. Compounds reported in option B and C has one carbon atom less and more, respectively as compared to the compound reported in question. Hence, they are also not isomers.
Answer:
Evaporation from the hydrosphere provides the medium for cloud and rain formation in the atmosphere. The atmosphere brings back rainwater to the hydrosphere. The atmosphere provides the geosphere with heat and energy needed for rock breakdown and erosion. The geosphere, in turn, reflects the sun's energy back into the atmosphere.
Explanation:
Answer:
<em>a. </em>The buffering range is between 2.74 and 4.74.
<em>b.</em> The ratio of the formate to the formic acid is 10.23.
Explanation:
<em>a.</em> For every buffer solution, the optimal effective range is pH = pKa ± 1. Outside this range, the buffer does not work properly.
For the formic acid, the pKa is 3.74, thus the optimal range is between 2.74 and 4.74.
<em>b. </em>The Henderson-Hasselbalch equation is a chemical expression used to calculate the pH of a buffer knowing the ratio of the acid to base, or to calculate the ratio knowing the pH. The expression is:
where [A^{-}] is the concentration of the conjugate base and [HA] is the concentration of the acid.
For a formic acid/potassium formate solution that has a pH of 4.75 and pka of 3.74: