Chemistry - December 2006

she my problem is this. im understsanding like Na + Cl is NaCl
but what about these like this...
Cu+1 + Cl
Sn+4 + Cl
Cr+7 + Se

please expalin
thx!!

2006-12-03 13:46:20 · 2 answers · asked by Anonymous

You are given three different compounds and must use your knowledge of INTERmolecular forces to determine the order that each compound will BOIL. You are given:
·Ammonia
·Octane
·(Liquid) Nitrogen (N2)
#1: Identify which liquid will boil first, second, etc.
why is it in that order?

2006-12-03 13:42:03 · 3 answers · asked by Anonymous

7: If the valence of element X is +2 and the valence of element Y is -3, the formula of the product when combined is
a] XY
b] X2Y3
c] X3Y2
d] X6Y6

18: The only common radical which has a positive valence is
a] SO4
b] NO3
c] NH4
d] CrO4


19: In the compound KClO3 the total negative valence is
a] -2
b] -4
c] -3
d] -6


thankyou so so much!

2006-12-03 13:35:18 · 1 answers · asked by secret_annexe_89 1

2006-12-03 13:29:10 · 2 answers · asked by Aditya N 2

We know that SF4 is see-saw shape . But what is its exact bond angle ?

2006-12-03 13:28:41 · 1 answers · asked by random people 2

2006-12-03 13:23:46 · 2 answers · asked by emma s 1

why is it not necessary to know the exact concentration of the NaOH solution used?

2006-12-03 13:03:28 · 1 answers · asked by Ms.Q's 1

a) C2H3O2 -(aq) is a product

b) When balanced the coefficient of KOH(aq) is 3

c) Only ions appear in the net ionic equation

d) H+(aq) does not appear in the net ionic equation

e) K+(aq) appears in the net ionic equation

2006-12-03 12:46:04 · 1 answers · asked by mimi 1

it is a MCQ question , im not sure which one . From question ,

Y(aq) added with Fe(2+) aq will give us yellow solution . X could be

A) . MgO B).Al2O3 C) SiO2 D) Cl2O7

i know it cant be MgO since it is basic oxide .And I believe the yellow solution must have something to do with oxidation of F2(2+) to Fe(3+) . I know Al(3+) cannot oxidise Fe(2+) . So is it C or D ?

2006-12-03 12:38:19 · 2 answers · asked by random people 2

please help me with this. it was my science homework to find the dot diagram of C(6)H(12)O(6) (number in parentheses is amount of each. please tell me only if you absolutely know the answer. i'd be sooo greatful if you could help me. thanks :)

2006-12-03 12:12:24 · 2 answers · asked by BEAutiful 2

Which of the following statements are true?

SiCl4(l) + 2Mg(s) --> 2MgCl2(s) + Si(s)

a) Mg is the reducing agent

b) SiCl4 is the reducing agent

c) Mg is oxidized

d) SiCl4 (or Si in SiCl4) is oxidized

e) SiCl4(l) + 2H2O(l) --> 4HCl(aq) + SiO2(s) is a redox reaction

f) 2CuCl(aq) --> CuCl2(aq) + Cu(s) is a redox reaction

2006-12-03 11:30:58 · 3 answers · asked by tinamso619 1

When methane gas [CH4] condenses to become a liquid which forces must be overcome?

a. dispersion
b. dipole - dipole
c. hydrogen bonding
d. ion - dipole
e. none of the above

2006-12-03 11:28:25 · 2 answers · asked by Ali A 2

In which compounds are there dipole-dipole attractions?

a. HBr
b. H2Se
c. AsH3
d. GeH4
e. AsF5

2006-12-03 11:24:26 · 2 answers · asked by Ali A 2

ozone is O3

2006-12-03 11:24:10 · 3 answers · asked by ? 2

Which liquid has the highest boiling point?

a. C2H5SH
b. C2H6
c. C2H5OH
d. CH3OCH3
e. they all exhibit the same boiling point

2006-12-03 11:23:07 · 3 answers · asked by Ali A 2

2006-12-03 11:06:46 · 2 answers · asked by RANDY B 1

l. NaH2PO4 + HOH-->
m. Na2HPO4 + HOH-->
n. Na3PO4 + HOH-->

2006-12-03 11:06:11 · 1 answers · asked by Ozzie 1

Which of the following statements are true for the reaction


Ca(OH)2(aq) + HCl(aq) -->



a) CaCl(aq) is a product

b) When balanced the coefficient of HCl(aq) is 3

c) Ions cannot appear in the net ionic equation because they always cancel out on both sides of the equation

d) Ca(OH)2(aq) appears in the net ionic equation

e) H2O(l) appears in the net ionic equation

2006-12-03 11:05:10 · 3 answers · asked by tinamso619 1

I've been through the glossary of my chemistry book and can't seem to figure out the answer to this--all the definitions are slightly different.

Compounds comprised of the same number and kinds of atoms but which differ in their atomic arrangement of those atoms are known as:

a) isotopes
b) isomers
c) homologs
d) allotropes

Please back up your answer with a reference. Thank you! :)

2006-12-03 10:57:16 · 3 answers · asked by katielou2010 1

Examples would be very useful.

2006-12-03 10:43:12 · 2 answers · asked by luke180288 1

CrC1
NaCN
CuS

2006-12-03 10:42:41 · 2 answers · asked by Elenore R 1

I need P2...

P1=850 mmhg
V1=1.5 L
T1=288*K
V2=2.5 L
T2=303*K

Please help quick... will give 10 points to correct answer!!!

2006-12-03 10:40:49 · 4 answers · asked by B-Rad 4

Is the soluton acidic or basic? how would I do this problem and what are the numbers that tell you wether a solution is acidic or basic?

2006-12-03 10:35:19 · 2 answers · asked by danielle 2

Combined Gas Law...
Need V1...

P1=650 torr
T1=373*K
P2=900 torr
V2=225 mL
T2=423*K

Im not just trying to cheat, im seriously having trouble with these problems. Will give 10 points correct answer!!! Help

2006-12-03 10:35:04 · 3 answers · asked by B-Rad 4

HC2H3O2(aq) + KOH(aq) -->



a) C2H3O2 -(aq) is a product

b) When balanced the coefficient of KOH(aq) is 3

c) Only ions appear in the net ionic equation

d) HC2H3O2(aq) appears in the net ionic equation

e) K+(aq) appears in the net ionic equation

2006-12-03 10:28:51 · 2 answers · asked by Reimei 2

Combined Gas Law...
I need T1...
P1=95 kPa
V1=4.0 L
P2=101 kPa
V2=6.0 L
T2=471*C w/kelvin
Will give 10 POINTS to correct answer... please

2006-12-03 10:25:40 · 4 answers · asked by B-Rad 4

If so, what is it? And what does this have to do with unpaired valence electrons?

Also, make this applicable to nitrates. I know if it is a main group cation, it will be colorless or white. I know if it is a transition metal, it will be colored. But why? try to answer this by telling me about UNPAIRED VALENCE ELECTRONS

2006-12-03 10:19:26 · 1 answers · asked by Hadeer S 1

Combined gas law???
I get all the others, this 1 one confusing to me.
I need to find P1,

V1=750 ml
T1=273*C w/kelvin
P2=2.0atm
V2=500mL
T2=298*C w/Kelvin

2006-12-03 10:18:07 · 3 answers · asked by B-Rad 4

2006-12-03 09:54:18 · 6 answers · asked by geebgeebgeeb 1

first: Why is it necessary to use a descrpitive naming system for colvalent compunds?
second: What are molecular elements and how are they named?

Pls help im am stuck on these two

2006-12-03 09:29:23 · 7 answers · asked by dylanklassen 2