From models to materials

Outline why solid tin(IV) iodide is classified as a polar covalent compound. Use sections 9 and 17 of the data booklet.

Contrast tin and tin(IV) iodide in terms of one physical property.

Kevlar is a condensation polymer. Deduce the structures of the two monomers from which Kevlar is made.

The displayed formula below shows part of the chain of an addition polymer. (i) Deduce the structural formula of the monomer used to build this polymer. (ii) Describe one chemical property responsible for this type of polymer being a useful material.

Which monomer produces this addition polymer? A. $\ce{CH2=CHCH2CH3}$ B. $\ce{CH3CH=CHCH3}$ C. $\ce{CH2=C(CH3)2}$ D. $\ce{CH2=CHCH=CH2}$

4.81 g of sulfur was heated in a stream of chlorine gas until the reaction was complete. The mass of the chloride produced was 10.13 g. (i) Calculate how many atoms are present in this 4.81 g sample of sulfur. Use sections 2 and 7 of the data booklet. (ii)…

4-Methylstyrene is capable of undergoing polymerization. Draw a section of the resulting polymer chain, showing three repeating units, and state what type of polymerization this is.

(i) Hexanedioic acid reacts with hexane-1,6-diamine, $\ce{H2N(CH2)6NH2}$. State the type of polymer that is formed. (ii) Draw one repeating unit of the polymer's structure.

(i) Using sections 9 and 17 of the data booklet, and showing your working, deduce the type of bonding present in magnesium chloride, $\ce{MgCl2}$, and its percentage covalent character. (ii) Assuming purely ionic bonding, and using sections 9 and 12 of the…

A computer simulation models what happens when small pieces of lithium and of sodium are dropped into water. For each metal five pieces of increasing mass are used, the same set of masses for both metals, and the simulation records how long each piece takes to…