Which statement best describes the propertyxng f77gj/;c ies of an alloy?

  Which statements regarding bz 4f5 j+pwhhxntxqjl5+n 7sc bj9oy.02 q0:ialloys 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 th gv/(h rtdu5/h- xo.qle below polymerization reaction ar//glq r u-ho 5d(vxh.te:

  1.Write balanced chemical equations for the5pspe64-g7 eazk5 qsf 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 boy e8btgpw60/r vn5p x0nding 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 compk sspne91y05 b3nkty: ounds in Earth’s crust at nearlykk9nbss01p5e yn t3y: 9% by 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 wheren 6( nf/w/wjsx one of the atoms in the bond has an electronegativity equal to 2.3. What is the electronegativity o( fw6nx/j/ snwf the other atom?

Refer to Section 17 of the data booklet.

  A polymer P has a repeat unit with the followi6m cne e0 qt;-+tcf0vdng 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 8apxo)+/tfk i material with an electronegativity difference of 2.2 and an average electroneaof+/ix8ptk )gativity equal to 1.8?
Refer to Section 17 of the data booklet.

  Which of the following is pa-joe qy- ib5i;.f/cthe correct order for % ionic character from highest to lowest for-yiej o/i5pfq.bac;- the following compounds?