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The ammonia molecule is predicted to have a trigonal pyramidal or distorted tetrahedral shape by the valence shell electron pair repulsion (VSEPR) theory. The nitrogen atom at the center of the molecule has five electrons in its valence shell, three of which it shares with the three hydrogen atoms to form bonds. The remaining two electrons form a lone pair. The lone pair repels the bonding orbitals, which causes the molecule to have a distorted tetrahedral shape. Consequently, The ammonia molecule (NH\(_3\)) has a trigonal pyramidal shape.

Air is a mixture of gases in the proportion of Nitrogen - 78%, Oxygen - 21%, Carbon(IV) oxide - 0.03%, Argon - 1% etc

Boyle's law states that the pressure and volume of a gas have an inverse relationship when the temperature is kept constant. ⇒ P ∝ \(\frac{1}{V}\) P = K\(\frac{K}{V}\) PV = K Boyle's law can be represented mathematically as PV = K, where P = Pressure, V = Volume and K is a constant.

Firstly, Relative Molecular mass = 2 x Vapour Density The challenge is to find the relative molecular mass = Molar mass of the gas But we were given V = 560cm\(^3\) , Molar Volume = 22.4 dm\(^3\) = 22400cm\(^3\) and Mass = 0.4g However, we can obtain the value for Number of moles, then easily obtain the value for our Molar mass, using mass given. ⇒ n = \(\frac{V}{M.V}\) = \(\frac{560}{22400}\) = 0.025 mole Also, n = \(\frac{m}{M}\) M = \(\frac{m}{n}\) = \(\frac{0.4}{0.025}\) = 16.0 Recall that Molar mass of gas = 2 x V.D Therefore, V.D = \(\frac{16.0}{2}\) = 8.0

l = 1 corresponds to p-subshell, P\(_x\), P\(_y\), P\(_z\) and the shape of p-orbital is dumb-bell.

Esterification involves an acid and an alcohol, while neutralization involves an acid and a base.It is a condensation reaction, where two molecules combine to form a larger molecule while eliminating a smaller molecule. In esterification, an alcohol and a carboxylic acid combine to form an ester and water. Esterification is primarily analogous to a condensation reaction, not a neutralization reaction. In a condensation reaction, two molecules combine to form a larger molecule and a small molecule, such as water, is released. Esterification, the reaction between an alcohol and a carboxylic acid to form an ester, fits this definition as it produces water as a byproduct. Neutralization reactions, on the other hand, involve the reaction between an acid and a base, producing salt and water, and are not a direct analogy for esterification. However, if condensation is not in the option, and we have only neutralization present among the options, then Neutralization will be the best option.

The parent name is Pent-2-ene because the double bond is on C-2. Also, there are two methyl group on C-2 and C-3, hence we have 2,3-dimethyl Finally, join together the two, we have 2,3-dimethyl pent-2-ene

The dehydration of ethanol is a chemical reaction that produces ethene and water from ethanol: The chemical equation for the dehydration of ethanol is: CH\(_3\)CH\(_2\)OH + H\(_2\)SO\(_4\) → CH\(_2\)=CH\(_2\) + H\(_2\)O The reaction is performed by heating ethanol with concentrated sulfuric acid at around 170^\circC. Sulfuric acid is a dehydrating agent, meaning it absorbs water.

The dehydration of ethanol is a chemical reaction that produces ethene and water from ethanol: The chemical equation for the dehydration of ethanol is: CH\(_3\)CH\(_2\)OH + H\(_2\)SO\(_4\) → CH\(_2\)=CH\(_2\) + H\(_2\)O The reaction is performed by heating ethanol with concentrated sulfuric acid at around 170^\circC. Sulfuric acid is a dehydrating agent, meaning it absorbs water.

In the novel, 'The Life Changer', the 'Notes of Salvation' is a euphemism for the cheat notes that Kolawole Abdul passed to Salma. This can be found on page 52 of the novel where Salma convinced her seat partner, Kola, during her final examination to scribble and slip her these "notes of salvation" as she had nothing to write.

archbishop - /ˌɑːtʃˈbɪʃ.əp/ Christian - /ˈkrɪs.tʃən/ chemical - /ˈkem.ɪ.kəl/ archangel - /ˈɑː.keɪn.dʒəl/ sachet - /ˈsæʃ.eɪ/

permit - /pəˈmɪt/ (verb) or /ˈpɜː.mɪt/ (noun) enlist - /ɪnˈlɪst/ commit - /kəˈmɪt/ meat - /mi:t/ profit - /ˈprɒf.ɪt/

boys - /bɔɪz/ moist - /mɔɪst/ elbows - /ˈel.bəʊz/ noise - /nɔɪz/ stays - /steɪz/

For polysyllabic words that end in "ity", the stress is usually placed on the ante-penultimate syllable i.e. the third syllable from the last. Therefore, the most appropriate stress placement is "producTIvity".

busy - /ˈbɪz.i/ vineyard - /ˈvɪn.jɑːd/ automobile - /ˈɔː.tə.mə.biːl/ twilight - /ˈtwaɪ.laɪt/ island - /ˈaɪ.lənd/