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In the first step, manganese(III) ions formed from the manganate(VII) are complexed by ethanedioate ions. [Mn(H2O)6]3+(aq) + 2 C2O42−(aq) → [Mn(C2O4)2(H2O)2]−(aq) + 4 H2O(l) (i) Adding a small amount of manganese(II) sulfate, MnSO4(s), at the…
Both ionic and covalent bonding are present in sodium ethanedioate, Na2C2O4. (i) Describe the two types of bonding. Ionic bonding: Covalent bonding: (ii) Deduce a Lewis formula of the ethanedioate ion, C2O42−. (iii) State the geometry of the…
What is the maximum number of electrons that can occupy the n = 4 main energy level? A. 8 B. 16 C. 18 D. 32
The structure of galantamine is shown below. (i) State the type of structural formula shown. (ii) State the name of the functional group that contains the nitrogen atom. (iii) Outline the effect of this functional group on the pH of water in which galantamine…
A chemist treated 22.99 g of galantamine with sulfuric acid to make the sulfate salt: 2 C17H21NO3 + H2SO4 → (C17H22NO3)2SO4 The mass of salt isolated was 24.65 g. Determine the percentage yield of the salt. Use section 7 of the data booklet.
Which set correctly shows the numbers of protons, neutrons and electrons in ? A. Protons 29, neutrons 36, electrons 31 B. Protons 29, neutrons 36, electrons 27 C. Protons 27, neutrons 65, electrons 27 D. Protons 65, neutrons 65, electrons 29
State the IUPAC name of compound Y.
Calculate the percentage by mass of hydrogen in compound Y, giving your answer to four significant figures. Use section 7 of the data booklet.
Draw the structural formula of one structural isomer of compound Y.
Compound Y undergoes nucleophilic substitution with a hydroxide nucleophile. (i) Describe the movement of electron pairs during the reaction using curly arrows. (ii) Contrast homolytic and heterolytic fission of the C–Cl bond in compound Y. (iii) Explain,…