<span>STP signifies standard temperature and pressure.
This conditions are at 1 atmospheric pressure and 0 degrees Celsius. It has
been said that at these conditions, one mole of a gas molecule is equivalent to
22.4 liters of volume. Therefore, the correct answer is the second option which
is 2 L of CH4.</span>
The answer is yellow .
That is if you started blowing your exhaled air into a phenol-red containing solution, then it color will change to yellow.
It changes it color as we blow exhaled air into it as we are introducing carbon dioxide into the mixture.
And as carbon dioxide concentration increases, the H ion concentration increases that means the solution becomes acidic that is it becomes yellow.
Answer:
2-iodo-2-methylpentane > 2-bromo-2-methylpentane > 2-chloro-2-metylpentane > 3-chloropentane.
Explanation:
At a substitution reaction by SN1, the alkyl halide must lose its halide, and then an intermediary will be formed: a carbonium, which is an alkyl group with a positive charge in the carbon. The halide lost will be formed the halide ion, which is also an intermediary of the reaction.
The reactivity depends on the stability of the intermediaries (first of the carbonium, and second of the halide ion). As more bonded with carbons is the carbonium, more stable it is. The order of stability of the halides ions is from their electronegativity: as lower is it, as stable is the ion. The order is then: I⁻ > Br⁻ > Cl⁻ > F⁻.
2-bromo-2-methylpentane, 2-chloro-2-metylpentane, and 2-iodo-2-methylpentane, will form a 3-degree intermediary, so they will be more reactive than 3-chloropentane, which form a 2-degree intermediary. So, for the order of the stability of the halide ions, the order of reactivity is:
2-iodo-2-methylpentane > 2-bromo-2-methylpentane > 2-chloro-2-metylpentane > 3-chloropentane.
