Kon

This page lists questions and answers that were posted by visitors named Kon.

Questions

The following questions were asked by visitors named Kon.

It is given a quadratic function y=a(x-h)62+k.If its graph is a parabola with x=2 as its axis of symmetry,and it passes through the two points(3,7)and(4,11) (a)what isthe value of the constant h? (b)find the values of the constants a and k,and write down...

it is given that there are 2moles of nitrate ions and 1.2moles of iron(II)ions in a mixture of iron(II)nitrate and iron(II)carbonate.Calculate the number of moles of carbonate ions.

A uniform heavy rope hangs freely from a support. the support is made to oscillate horizontally with a small amplitude so as to send transverse waves down the rope.A standing wave is set up as these waves are reflected at the free end.Which of the followi...

Answers

The following answers were posted by visitors named Kon.

1) slope=0(it means the line is horizontal and parallel to x axis) so, ans: the equation is y=3(this is becuz the line is parallel to x-axis and intercept at y(0,3),all intercept on this line must be y=0)

1) slope=0(it means the line is horizontal and parallel to x axis) so, ans: the equation is y=3(this is becuz the line is parallel to x-axis and intercept at y(0,3),all intercept on this line must be y=3)

DrBob222 is wrong.potassium burns with lilac flame when react with water.(of cuz if the reaction is too small,lilac flame is difficult to be observed)

#3is correct!!!!!!!!!! becuz in wave motion,it transfer WAVE ENERGY only without transferring the matter.Bear in mind!

additional explanation:this is so called geometric sequence

Each year decrease 3.8 per cent,so n years remain 51200*(1-0.038)^n, ans: 51200(1-0.038)^14 =29766 customers (corr. to the nearest integer)

ya!its due to the delocalised electrons,plz bear in mind that,do not write free electrons during exams,or marks will be deducted!u must write DELOCALIZED ELECTRONS.

giant metallic structure---delocalized electrons giant ionic structure-----mobile ions giant covalent-----delocalized simple molecular struct.----absence of mobile ions

my ans is just to show him the logic of calculate the chapter of reacting mass.and i agree that your method is absolutely good for MC question.

Let x be one part and 39-x be the other part. ans:2/3(x)+3/4(39-x)=28 x=15 therefore,one part divided out is 15 and the other part is (15-2)=13

oh sorry,the other part is 39-15 and should be24

chemical bonding:-ionic bond -covalent bond -metallic bond (intermolecular force is not a bond) in fact,all bonding have an aim.it is to make the outermost cell of the atom be full of electrons(8 electrons or 2 electrons,two electrons is only for the firs...

eg.(K lose one electrons become K+) (Cl atom gain one electrons become Cl- ) Conclusion: anion gain electrons from cation,as one positive charge(K+)and negative charge(Cl-)meet,they tend to form ionic compound.(they attach to each other becuz positive and...

Attachment: Charge are fixed. eg. Mg(2,8,2)Lose 2 electrons become Mg2+ (2,8).so there are no Mg+ or Mg3+... question: Zn2+ + Cl- ==>? ans:ZnCl2 becuz Cl- has one negative charge,it need two of Cl- to cancel out the 2+ charge of Zn more about ionic bond:...

8-5x<2x-20 8+20<2x+5x 28<7x 4<x X>4 (REMARK:only if a number is divided by a negative number should the inequality mark change to the opposite one.)

i thinkthe only ans is x> 0,its impossible to log a negative no.u may try to use a calculator to prove it. then x/x should be done first.so x < -8 or x> -8 is also possible.

The correct answer is D

Repost from aca sucks. 1: both sahel squares 2: (top) sundiata, mali, mana musa, songhai (bottom) 3. trade with greek and romans and influence of a captured syrian servant 4. both were commercial trade centers 5.Mali became primarily a Muslim culture. 6.C...