Which statement best describes 7)t)jdh+b q trthe properties of an alloy?

  Which statements regarding alloys are correc5v)zvue8 w5tn t?
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/5b7 /ztw:shpsb:t w5wy gcg; the monomer and polymer in the below polymerization reactp/tyw c/sstg5bw 5:w;: gzb7hion are:

  1.Write balanced chemkmx3; b5w;tyu- c nb2kical 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 bonding is present in9dsh4 c1m ueuup682je $SiO_2$ , 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(o(za6dh + jly compounds in Earth’s crust at nearly hz ((loa+yj6d9% 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 has am 1ch4xs+j la.ok,q - irxd9 xj:(fs5rn electronegativity equal to 2.3. What is the electronegativity of the otxcrr4xmhi:xjs s5kl9f-. +a1(j d, qoher atom?

Refer to Section 17 of the data booklet.

  A polymer P has a repeat unit with the following structurgw stqh)v-o /7.ujs6vy-y : boal 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 electronegatu+2v4u0. d ctgerzc ;zivity difference of 2.2 and an average electronegativity e gcrdv u.utz; 2c+0ze4qual to 1.8?
Refer to Section 17 of the data booklet.

  Which of the following is the cor27 y/+uuzbtw a3*ru yzrect order for % ionic character from highest to lowest for the following compounz/r3+zbw ay2yu*t7uu ds?