// JavaScript Document
thepage="Density's Relationship to Moles"
//global variables
refnumber=14
//11/20/02-updated netscape 7
attempts=0
totl=0
corrt=0
tried=0
attempts=0
qtype=0
which=0
first=0
second=0
thesame=0
theanswer=""
theanswr=0
insert=new Array()
function setup(){
for(j=1;j<=4;j++){
	moles[j]=0
	volume[j]=0
	mass[j]=0
	}
for(j=1;j<=6;j++)given[j]="";
}	
spot=new Array()
moles=new Array()
mass=new Array()
volume=new Array()
given=new Array()
function atom(name,sym,mass,density){
        this.name=name
        this.sym=sym
        this.mass=mass
        this.density=density
}
function ask(p1,p2,p3,p4,p5){
        this.p1=p1
        this.p2=p2
        this.p3=p3
        this.p4=p4
        this.p5=p5
}
questions=new Array(30)
questions[1]=new ask("What volume of "," in cm<sup>3</sup> will have the same mass as "," moles of ","?")
questions[2]=new ask("What volume of "," in cm<sup>3</sup> will have the same mass as "," cm<sup>3</sup> of ","?")
questions[3]=new ask("How many moles of "," will have the same mass as "," moles of ","?")
questions[4]=new ask("How many moles of "," will have the same mass as "," cm<sup>3</sup> of ","?")
questions[5]=new ask("What volume of "," in cm<sup>3</sup> will have the same number of moles as "," grams of ","?")
questions[6]=new ask("What volume of "," in cm<sup>3</sup> will have the same number of moles as "," cm<sup>3</sup>  of ","?")
questions[7]=new ask("What mass of "," in grams will have the same number of moles as "," grams of ","?")
questions[8]=new ask("What mass of "," in grams will have the same number of moles as "," cm<sup>3</sup> of ","?")
questions[9]=new ask("What mass of "," in grams will have the same volume as "," moles of ","?")
questions[10]=new ask("What mass of "," in grams will have the same volume as "," grams of ","?")
questions[11]=new ask("How many moles of "," will have the same volume as "," moles of ","?")
questions[12]=new ask("How many moles of "," will have the same volume as "," grams of ","?")
a=new Array()
a[1]=new atom("lithium","Li",6.941,.53)
a[2]=new atom("beryllium","Be",9.01218,1.85)
a[3]=new atom("boron","B",10.811,2.34)
a[4]=new atom("carbon","C",12.011,2.26)
a[5]=new atom("bismuth","Bi",208.9804,9.75)
a[6]=new atom("polonium","Po",209,9.3)
a[7]=new atom("gold","Au",196.9665,19.3)
a[8]=new atom("platinum","Pt",195.08,21.45)
a[9]=new atom("sodium","Na",22.98977,.97,24)
a[10]=new atom("magnesium","Mg",24.305,1.74)
a[11]=new atom("aluminum","Al",26.98154,2.70)
a[12]=new atom("silicon","Si",28.086,2.33)
a[13]=new atom("phosphorous","P",30.97376,1.82)
a[14]=new atom("sulfur","S",16,32.066,2.07)
a[15]=new atom("thallium","Tl",204.383,11.85)
a[16]=new atom("lead","Pb",207.2,11.35)
a[17]=new atom("potassium","K",39.098,.86)
a[18]=new atom("calcium","Ca",40.08,1.55)
a[19]=new atom("scandium","Sc",44.9559,2.99)
a[20]=new atom("titanium","Ti",47.88,4.54)
a[21]=new atom("vanadium","V",50.9415,6.11)
a[22]=new atom("chromium","Cr",51.996,7.19)
a[23]=new atom("manganese","Mn",54.9380,7.44)
a[24]=new atom("iron","Fe",55.847,7.87)
a[25]=new atom("cobalt","Co",58.9332,8.90)
a[26]=new atom("nickel","Ni",58.69,8.90)
a[27]=new atom("copper","Cu",63.546,8.96)
a[28]=new atom("zinc","Zn",65.39,7.13)
a[29]=new atom("gallium","Ga",69.723,5.91)
a[30]=new atom("germanium","Ge",72.61,5.32)
a[31]=new atom("arsenic","As",74.9216,5.76)
a[32]=new atom("selenium","Se",78.98,4.79)
a[33]=new atom("bromine","Br",79.904,3.12)
a[34]=new atom("osmium","Os",190.2,22.6)
a[35]=new atom("rubidium","Rb",85.4678,1.53)
a[36]=new atom("strontium","Sr",87.62,2.54)
a[37]=new atom("yttrium","Y",88.9059,4.47)
a[38]=new atom("zirconium","Zr",91.224,6.51)
a[39]=new atom("niobium","Nb",92.9064,8.57)
a[40]=new atom("molybdenum","Mo",95.94,10.22)
a[41]=new atom("iridium","Ir",192.22,22.6)
a[42]=new atom("ruthenium","Ru",101.07,12.37)
a[43]=new atom("rhodium","Rh",102.9055,12.41)
a[44]=new atom("palladium","Pd",106.42,12.0)
a[45]=new atom("silver","Ag",107.868,10.50)
a[46]=new atom("cadmium","Cd",112.411,8.65)
a[47]=new atom("indium","In",114.82,7.31)
a[48]=new atom("tin","Sn",118.710,7.31)
a[49]=new atom("antimony","Sb",121.75,6.69)
a[50]=new atom("tellurium","Te",127.60,6.24)
a[51]=new atom("iodine","I",126.9045,4.93)
a[52]=new atom("mercury","Hg",200.59,13.55)
a[53]=new atom("cesium","Cs",132.9054,1.87)
a[54]=new atom("barium","Ba",137.27,3.59)
a[55]=new atom("lanthanum","La",138.9055,6.15)
a[56]=new atom("cerium","Ce",140.115,6.77)
a[57]=new atom("praseodymium","Pr",140.9077,6.77)
a[58]=new atom("neodymium","Nd",144.24,7.01)
a[59]=new atom("promethium","Pm",145,7.22)
a[60]=new atom("samarium","Sm",150.36,7.52)
a[61]=new atom("europium","Eu",151.985,5.24)
a[62]=new atom("gadolinium","Gd",157.25,7.90)
a[63]=new atom("terbium","Tb",158.925,8.23)
a[64]=new atom("dysprosium","Dy",162.50,8.55)
a[65]=new atom("holmium","Ho",164.930,8.80)
a[66]=new atom("erbium","Er",167.26,9.07)
a[67]=new atom("thullum","Tm",168.9342,9.32)
a[68]=new atom("ytterbium","Yb",173.04,6.97)
a[69]=new atom("lutetium","Lu",174.97,9.84)
a[70]=new atom("hafnium","Hf",178.49,13.31)
a[71]=new atom("tantalum","Ta",180.9479,16.65)
a[72]=new atom("tungsten","W",183.85,19.3)
a[73]=new atom("rhenium","Re",186.207,21)
function setup(){
for(j=1;j<=4;j++){
	moles[j]=0
	volume[j]=0
	mass[j]=0
	}
for(j=1;j<=6;j++)given[j]="";
}	
function startit(){
	for(j=1;j<4;j++)insert[j]="";
	totl++
	clear()
	setup()
	document.forms[0].total.value=totl
	first=Math.ceil(73*Math.random())
	second=first
	while(second==first){second=Math.ceil(73*Math.random())}
	forseq=new Array(a[first].mass,a[first].density,a[second].mass,a[second].density)
	qtype=Math.ceil(3*Math.random())
		if(qtype==1){samemass(first,second)}
		if(qtype==2){samevolume(first,second)}
	if(qtype==3){samemoles(first,second)}
}
function samemass(first,second){
	while(mass[1]<1){mass[1]=number(Math.random()*100,3,3)}
	mass[2]=mass[1]
	moles[1]=mass[1]/a[first]['mass']
	moles[1]=number(moles[1],3,3)
	moles[2]=mass[2]/a[second]['mass']
	moles[2]=number(moles[2],3,3)
	volume[1]=mass[1]/a[first]['density']
	volume[1]=number(volume[1],3,3)
	volume[2]=mass[2]/a[second]['density']
	volume[2]=number(volume[2],3,3)
	which=Math.ceil(4*Math.random())
	insert[1]="=>"
	spot[2]=" mass of "	
	thesame=mass[1]
	buildquest()
	type="same mass"
}
function samemoles(first,second){
	while(moles[1]<.1){moles[1]=number(3*Math.random(),3,3)}
	moles[2]=moles[1]
	mass[1]=moles[1]*a[first]['mass']
	mass[1]=number(mass[1],3,3)
	mass[2]=moles[2]*a[second]['mass']
	mass[2]=number(mass[2],3,3)
	volume[1]=number(mass[1]/a[first]['density'],3,3)
	volume[2]=number(mass[2]/a[second]['density'],3,3)
	which=4+Math.ceil(4*Math.random())
	insert[3]="=>"
	spot[2]=" moles of "
	thesame=moles[1]
	buildquest()
	type="same moles"
	
}
function samevolume(first,second){
	while(volume[1]<.1){volume[1]=number(50*Math.random(),3,3)}
	volume[2]=volume[1]
	mass[1]=number(volume[1]*a[first]['density'],3,3)
	mass[2]=number(volume[2]*a[second]['density'],3,3)
	moles[1]=number(mass[1]/a[first]['mass'],3,3)
	moles[2]=number(mass[2]/a[second]['mass'],3,3)
	which=8+Math.ceil(4*Math.random())
	insert[2]="=>"
	spot[2]=" volume of "
	thesame=volume[1]
	buildquest()
	type="same volume"
	
}
function buildquest(){
if(which==1 || which==2 || which==5 || which==6){
		part1=volume[1]
		spot[3]=" volume of "
		given[4]="?"
		}
if(which==3 || which==4 || which==11 || which==12){
		part1=moles[1]
		spot[3]=" moles of "
		given[6]="?"
		}
if(which==7 || which==8 || which==9 || which==10){
		part1=mass[1]
		spot[3]=" mass of "
		given[2]="?"
		}
if(which==2 || which==4 || which==6 || which==8){
		part2=volume[2]
		spot[1]=" volume of "
		given[3]=volume[2]
		}
if(which==5 || which==7 || which==10 || which==12){
		part2=mass[2]
		spot[1]=" mass of "
		given[1]=mass[2]
		}
if(which==1 || which==3 || which==9 || which==11){
		part2=moles[2]
		spot[1]=" moles of "
		given[5]=moles[2]
		}
theanswr=part1
question=questions[which].p1+a[first]['name']+questions[which].p2+part2+questions[which].p3+a[second]['name']+questions[which].p4
showquest(question)
buildanswer()
}
ansphrase=new ask("Organize your data, identifying the given, the question and the connection. The table below shows how this is done. The entry in the left column is the starting value. The '=>' represents the connection between the two elements and the '?' denotes the quantity to be determined","Then develop a problem 'flow'. In this case you go from "," to ", " to ",". You should be familiar with the basic processes such as converting 'moles to grams'. The calculations for this problem are shown below.")

function buildanswer(choice){
thetable=buildtable()
thefinal=getseq()
//part2+" => "+thesame+" => "+part1
theanswer=ansphrase.p1+thetable+ansphrase.p2+spot[1]+a[second].name+ansphrase.p3+spot[2]+a[second].name+ansphrase.p4+spot[3]+a[first].name+ansphrase.p5+"<br>"+thefinal
}
function getseq(){
thefinal=""
if(which==1 || which==3)thefinal=part2+"*"+forseq[2]+"="+mass[2]+"<br>"+mass[2];
if(which==2 || which==4)thefinal=part2+"*"+forseq[3]+"="+mass[2]+"<br>"+mass[2];
if(which==5 || which==7)thefinal=part2+"/"+forseq[2]+"="+moles[2]+"<br>"+moles[2];
if(which==6 || which==8)thefinal=part2+"*"+forseq[3]+"/"+forseq[2]+"="+moles[2]+"<br>"+moles[2];
if(which==9 || which==11)thefinal=part2+"*"+forseq[2]+"/"+forseq[3]+"="+volume[2]+"<br>"+volume[2];
if(which==10 || which==12)thefinal=part2+"/"+forseq[3]+"="+volume[2]+"<br>"+volume[2];
if(which==1 || which==2)thefinal=thefinal+"/"+forseq[1];
if(which==3 || which==4)thefinal=thefinal+"/"+forseq[0];
if(which==5 || which==6)thefinal=thefinal+"*"+forseq[0]+"/"+forseq[1];
if(which==7 || which==8)thefinal=thefinal+"*"+forseq[0];
if(which==9 || which==10)thefinal=thefinal+"*"+forseq[1];
if(which==11 || which==12)thefinal=thefinal+"*"+forseq[1]+"/"+forseq[0];
return (thefinal+"="+part1)
}
function buildtable(){
thetable="<table><tr><td align=center></td><td align=center>"+a[second].name+"</td><td width=5></td><td align=center>"+a[first].name+"</td></tr>"
firstrow="<tr><td align=center>mass</td><td align=center>"+given[1]+"</td><td>"+insert[1]+"</td><td align=center>"+given[2]+"</td></tr>"
secondrow="<tr><td align=center>volume</td><td align=center>"+given[3]+"</td><td>"+insert[2]+"</td><td align=center>"+given[4]+"</td></tr>"
thirdrow="<tr><td align=center>moles</td><td align=center>"+given[5]+"</td><td>"+insert[3]+"</td><td align=center>"+given[6]+"</td></tr>"
thetable=thetable+firstrow+secondrow+thirdrow+"</table>"
return thetable
}
function answer(guess){
if(tried==1){alert("You've already done this problem. Get a new one!")}
else{
	if(tried==2){totl++;document.forms[0].total.value=totl}
	if (1.05*theanswr>guess & .95*theanswr<guess){
        	document.forms[0].results.value="correct"
        	corrt++
        	tried=1
        	document.forms[0].correct.value=corrt}
	else{
        document.forms[0].results.value="incorrect"
        tried=2
	}
	}
}