B) argon and krypton
C) fluorine and chlorine
D) oxygen and nitrogen
Answer:The given statement is true.
Explanation:
Continental Shelf: A portion of continent submerged under the relative shallow ocean water.Most of the gradually slopes down in to the water.
The relatively flat surface and shallow water makes it fitr place to harvest sea food, non renewable energy resources like : coal, petroleum .
The reagent required to convert an ester-like methyl butyrate into an amide like N-methylbutyramide is ammonia or an amine. The process involves a reaction called aminolysis.
The reagent required for the given reaction, which converts methyl butyrate (an ester) into N-methylbutyramide (an amide), would be ammonia (NH3) or an amine. The process involves a process known as aminolysis where an amine reacts with an ester to produce an amide. This is because the nitrogen within the amine or ammonia molecules attacks the carbonyl carbon of the ester to produce amide. It's critical to maintain an acidic condition to protonate the leaving group during this process.
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Answer:2p→1s
Explanation:
Frequency is inversely proportional to wavelength. The higher the frequency, the shorter that wavelength. The smaller the frequency the longer the wavelength. The frequency of light associated with 2p→1s is less than the frequency of light associated with 3p→1s since the latter represents transition from a much higher energy level. It follows that the wavelength associated with the former will be longer since its frequency is lesser. This deduction follows from our argument about the inverse relationship between frequency and wavelength.
The concentration of hydroxideions in the given aqueous solution is equal to 6.3 ×10⁻³ M.
pOH can be calculated from the negative logarithm of the concentration of hydroxideions in the given aqueous solution.
Mathematically, the formula of the pOH can be represented as shown below:
pOH = - log ([OH⁻ ])
and pH + pOH = 14 ..............(1)
Where [OH⁻] is representing the concentration of hydroxide ions in an aqueous solution.
Given, the value of the pH of the ammonia solution, pH = 11.8
Substitute the value of the pH in equation (1):
pH + pOH = 14
11.8 - log [OH⁻] = 14
- log [OH⁻] = 14 -11.8
log [OH⁻] = - 2.2
[OH⁻] = 6.3 × 10⁻³ M
Therefore, the concentration of the hydroxideions is equal to 6.3 ×10⁻³ M.
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