Which statement best describes the qx / juobly .9xh dj31yy sm/1x5x(+vjproperties of an alloy?

  Which statements regarding al/n+m7it7:rywu:de; /sk cnjwloys 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 pyyq m+0s* i/wfolymer in the below polymerization reacfi0wqym s/*+ ytion are:

  1.Write balanced chem*adhdg1zhmrt 20s ,f -ical equations for the reactions below:
.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 bondinc0b4sad4xbcn 7x u 8w)g 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, z gn)d g0,o2dy.hc7pwkm *pv 0is one of the most abundant compounds in Earth’s crust at nearly 9% byg m0g c27* pp dky,on.dv)wzh0 mass.
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 character where one of the atoms 53 lgwgq45zt wl l1/aain the bond has an electronegativity equal to 2.3. What is the electronegativity of the other attzla3wglqgl 5 4/ wa51om?

Refer to Section 17 of the data booklet.

  A polymer P has a repeat unipdoccs:h9; 73gdig l(t with 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 material with an electrfz:t2,bmwhv)f 6zn e 4onegativity difference of 2.2 and an averag :m,nzz)v6 f4eb2thw fe electronegativity equal to 1.8?
Refer to Section 17 of the data booklet.

  Which of the following is thxf-4lt+ *x d s)mrmegoj9n p48e correct order for % ionic character from highest to lowest for the followiedxfn8*-p m+g4mrx9j4o) ls tng compounds?