Due to the conjugate base of the hydrogen atom is aromatic, Hb is regarded as the most acidic. Because the conjugate base of the hydrogen atom Hc is anti-aromatic, it is the least acidic.
The correct options are:
(A) - (a)
(B) - (d)
The hydrogen connected at the heptatriene's tertiary position (at the 7-methyl) would be particularly acidic, as its removal would leave a positive charge that could be transported around the ring via resonance.
The hydrogen connected to the pentadiene (5-methyl) at the tertiary position would not be acidic, as removing it would result in an anti-aromatic structure.
Thus, the least acidic H atom is Hc and the most acidic H atom is Hb.
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Answer:
metallic bonds are defined as those in which metals share valence electrons for example when sodium metallically bonds with itself each atom is sharing the electrons in the third orbital with up to eight other atoms the same thing happens with magnetism or other metals metallically bond to themselves.
Answer:
(a)
Explanation:
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In this case, such nomenclature expresses the amount of both phosphorous and chlorine atoms via prefixes for the sub indexes of each atom into the molecule, thus, as phosphorous is prefixless one infers that there is just one phosphorous and five chlorides since the prefix for such atom is penta. Therefore, the correct formula is:
Hence, the answer is (a)
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Answer:
The correct formula for phosphorus pentachloride is a) PCl5
Answer:
c) 40 (o), 35 (+), 34 (-)
Explanation:
Let us represent the element with P
Given information about the element:
Charge on P = +1
Mass number of P = 75
We can express the atom as ⁴⁵P¹⁺
The positive charge on the atom denotes that the atom has lost an electron. Electrons are negatively charge elementary particles in an atom. Therefore, the number of protons, positively charged particles are now more. This charge imbalance is what leaves atom P with a charge of +1. The difference between the proton number and number of electrons is just 1 and it represents a loss of an electron. Atoms that are not charged have their proton and electron number to be the same. Those that are negatively charge signifies that an electron has been gained and the number of electrons are greater than those of the protons.
The mass number 75 is the number of protons plus neutrons.
Option C gives the following information:
Neutron = 40
Protons = 35
Electrons = 34
Here Protons > Electrons with a difference of 1+.
Mass number = Protons + Neutrons =35 + 40 = 75
The conclusive test for iron(II) ions is the test by the use of potassium hexacyanoferrate III solution.
In qualitative analysis certain reagents are used to test for the presence of certain cations or anions. Those reagents react in a certain way with those reagents. Usually, a positive test may involve a color change, formation of a precipitate or evolution of a gas.
In the case of iron(II) ions, potassium hexacyanoferrate III solution is used in the conclusive qualitative test for the ion. A positive test involves the appearance of a deep blue precipitate.
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Answer:
please brainlist answer
Explanation:
The addition of K 3 Fe(CN) 6 to a solution causes the formation of a deep blue precipitate which indicates that iron(II) ions are present.
B. 0.288 g
C. 0.392 g
D. 0.450 g
E. 0.341 g
Answer: The correct option is E.
Explanation: The reaction between aspirin (also known as acetylsalicylic acid) and sodium hydroxide is known as acid-base titration reaction.
By applying Unitary method, we get:
15.50mL of NaOH dissolves = 0.325 g of aspirin
So, 16.25 mL of NaOH will dissolve = = 0.341 g
Hence, the correct option is E.
water, air, oil
B
air, water, oil
C
oil, water, air
D
none of the above