Which statement best describes the propertibxrtjwdi:xni2y ;e j rrf//ls:/9*( g es of an alloy?

  Which statements regarding alloys ra,e8 26 m;dcp5opvm rare 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 poljeke- k9i 7b1rymer in the below polymerization reactionri -7e91jebkk are:

  1.Write balanced chemical equations for the react/1kh*ecyx9 wfions 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 bondinlhe;3vzy sm 9vu(6a)h 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, is one of the mosiwig8xnm 0237z fr 5xht abundant compounds in Earth’s crust at near80zgfni7 x xmr53h2 wily 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 where one of the atoms in the bond w f+7n zzjnw(tgbc*bu- 6lm;k4)gk,b has an electronegativity equal to 2.3. What iz b n*kc gmnt 7u,bf-+w4gj ;6()wlzkbs the electronegativity of the other atom?

Refer to Section 17 of the data booklet.

  A polymer P has a repeat unit with the following structural formula+vwlh64ce y94 +hc -gk5acgnza(s*hz .

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 ku rvqq0;kl5d+ h*9u b9jd8ks a material with an electronegativity diff 9vu*qj uhkdkdl 5r0;8ks b9+qerence of 2.2 and an average electronegativity equal to 1.8?
Refer to Section 17 of the data booklet.

  Which of the following is the correct order for p ii ( w qu;o6)ptz1j-dr6dkkfh20c;p% ionic character from highest to lowest f jki6do1r c6f; 2zu;pi0 ht)p(pd -wkqor the following compounds?