Which statement best de.l5ax*+-cqfz uht xi:scribes the properties of an alloy?

  Which statements regarding alloys are correcvb/x(k 79dy vf+k2 st5k nwdxwi, 3cl6t?
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 powbaeo9jj *f54 jic91slymer in the below polymerization reaction are: 94fa cjjs1b ej5iow*9

  1.Write balanced chemical equations for the reactions be x0 qd4bi(o ufc/bcg/9low:
.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 bonding is presenxyefcm z,j,ncwr.x:54 )imf nu 2sy d*p9 n*/nt 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, iv(e b /vlrxpy4(4tfc/s one of the most abundant compounds in Earth’s crust at nearly 9% b fvtc 4 pevrbyx(l/(4/y 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 r*-22ldqn okb in the bond has an elect2qr2 k-l*do bnronegativity equal to 2.3. What is the electronegativity of the other atom?

Refer to Section 17 of the data booklet.

  A polymer P has a repea,k* coel/b n:ejt+/u pt unit 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 a 5 c0njmzoem34n electronegativity difference of 2.2 and an average electr3n5m cm4 0ezojonegativity equal to 1.8?
Refer to Section 17 of the data booklet.

  Which of the following is the correct order for % ionic character from hi t;:twx z-w) dck 7x0kyl00koxghest to lowest for the following compoundswk y 00wk;xdk:x0)xc lz7- tot?