Which statement best describes9,q;j huo6ffz9 si,ga the properties of an alloy?

  Which statements regarding alnhhw kqz6n 5)t h4v6)bloys are correct?
I.Alloys are a solid solution held together with metallic bonds
II.Because the lattice contains differing-size ions, the metallic bonds are weaker
III.Alloys can have different chemical properties than their component elements

  The respective names of the monomer and polymer in the below polymerizapg;bl4 ia m3c6xy /dv8tion reactil4ma6c;d y /b 3ipx8gvon are:

  1.Write balanced chemical equations for the reactions bkk5:ztvisgm5 /zz99k 4g6w zvelow:
.1.Combustion of decane in excess of oxygen.
.2.Combustion of butane in a limited supply of oxygen.
.3.Complete combustion of ethanol.
2.Specify the test and its result to identify the presence of a double bond in ethene ($C_2H_4$) Support your answer with a balanced chemical equation.
3.Write an equation to show the polymerization of ethene and write the name of the polymer.The name is   

  What type of type of bonds i.zqne69fcdz6sku5s 22 3vn ing is present in $SiO_2$ , and what is the approximate percent covalent character?

Refer to Sections 9 and 17 of the data booklet.

  Iron (II) oxide,FeO, is one of the most abundant compounds in Eargs(xy/:iarxf r 7 hw1;th’s crust at nearly 9% by mass1/ wf(y7 rr;x gihxsa:.
Refer to Sections 9 and 17 of the data booklet for this question.
1.Calculate the electronegativity difference between iron and oxygen in FeO. The mumber=  .
2.Use Δx and the average x to identify the bond type that exists between iron and oxygen in FeO.Average electronegativity =  .
3.Iron can also exist as a $Fe^{3+}$ion ,resulting in iron (III) oxide when bonded to oxygen. Describe how the bond type differs in FeO compared to $Fe_2O_3$.

  A compound has 74% covalent charactes+ 1x (dd4uozh,o5oi n( c+ljwr where one of the atoms in the bond has an electronegativity equal to 2.3. What is the electronegativity of the otcu+i4 xo+sodn,z5( doj lw 1(hher atom?

Refer to Section 17 of the data booklet.

  A polymer P has a repeat unit wi69rq.ig6 irgf ltvr.z+ ebs:8 th the following structural formula.

1.State whether the carbon atom labelled with an asterisk (*) is  ----待选择----primarysecondarytertiary 
2.Polymer P is produced via the addition polymerisation of compound A.
.1.Draw the full structural formula of compound A.
.2.Compound A has two structural isomers that contain the same functional groups. State the IUPAC names of compound A and both structural isomers.
Compound A = but-  -ene;Isomers = but-  -ene
.3.State the observation when compound A is mixed with aqueous bromine.
.4.An organic compound can also be identified by measuring the mass of carbon dioxide and water produced when each gram of the compound undergoes complete combustion. The equation for the combustion of another compound B is shown.
B + 12$O_2$ → 8$CO_2$ +8$H_2O$
Explain why compound A could not be distinguished from compound B using this method.

  What properties would be characteristic of a materi j,hd .dvr69clz.*odoal with an electronegativity difference of 2.2 and.*o. ldzdrcj d96h ,vo an average electronegativity equal to 1.8?
Refer to Section 17 of the data booklet.

  Which of the following is thcb70 eht5 -l o(jrjxa+e correct order for % ionic character from highest to lowest for the following compounj5 jo7 arb-t0h(c+lxeds?