Chemistry - December 2006

For the reaction BaCl2 (aq) + ZnSO4 (aq) BaSO4 precipitates out.
Calculate the percent yield (%) if 13.084 g of BaSO4 precipitates
when 1.700 L of 0.0500 M BaCl2 (aq) and 2.180 L of 0.0300 M ZnSO4 (aq) are mixed.

2006-12-04 11:35:31 · 2 answers · asked by Andrew C 1

WOULD IT RUST

2006-12-04 11:32:04 · 20 answers · asked by Anonymous

2006-12-04 11:31:06 · 6 answers · asked by Anonymous

Balance these & Idenify what types these are, I'm taking chemistry 1 only
1. CO --» C + O2
2. NaCI + AgNO3 -» NaNO3 + AgCl
3. S + Cl2 -* SCl2
4. BaCI2 + NaOH -» NaCI + Ba(OH)2
5. Zn + CuSO4 -> ZnS04 + Cu
6. CH4 -» C +H2
7. Pb(NO3)2 + Mg ---> Pb + Mg(N03)2
8. Mg + HCl >>> MgCL2 + H2
9. H2S04 ---> H2 + S +O2
lO. O2 + N2 >>> N2O4
11. CaBr2 +Na3P>>> Ca3P2 + NaBr
12. KI + Br2 >>>KBr + I2
13. C6H12O6 >>> C+ H2O
14. NaF >>Na + F2
15. Si + 02 ----> SiO2
16. Nal + Pb(NO3)2 >>>NaNO3 + PbI2
17. Nal + Cs >>> CsI + Na
18. H2 + CO + O2 >>>>H2CO3
19. Li3 PO4 >> Li + P + O2
20. CS2 + F2 >>> CF4 + S
Just Balance these out only::
21. Zn + O2>>ZnO
22. HI>>H2 I2
23. B + F2 >>> BF3
24. N2 + H2 >>NH3
25. Fe + H2O >>> Fe3O4 + H2

2006-12-04 11:27:12 · 5 answers · asked by truckin_90 2

ok if i need to find the formula for calcium phosphate the first step is to write the symbols:

CaPO

so after the Ca is the little number 2+ on top and after the PO is the little number 3- on top and 4 on the bottom...my question is, on this first step HOW DID THEY FOUND OUT THE 4 ON THE BOTTOM? i know how to get the other two #s, yet i cant seem to find how they get the 4...PLZ PLZ PLZ HELP ME!

2006-12-04 11:20:20 · 1 answers · asked by Curious10106 2

please explain this to me!!

2006-12-04 11:18:44 · 8 answers · asked by bretssillyjo 1

2006-12-04 11:17:49 · 2 answers · asked by Anonymous

What volume of 0.55M nickel (II) nitrate, Ni(NO3)2, will react with 85mL of 0.25M potassium carbonate, K2CO3, to form nickel (II) carbonate, NiCO3, and potassium nitrate, KNO3?

How would I go about solving the problem? Thank you.

2006-12-04 11:15:48 · 2 answers · asked by Anaila 1

2006-12-04 11:13:36 · 8 answers · asked by Audrey S 1

2006-12-04 11:10:27 · 3 answers · asked by Anonymous

2006-12-04 10:59:39 · 3 answers · asked by nietzsche 1

I broke a mercurial thermometer this morning and the mercury went everywhere. I was able to use the end of the thermometer that had some mercury left inside to collect the mercury that had spilt on the carpet. I tried to be careful and not let it touch my skin but I'm certain that some of it did. Afterwards, I washed my hands throughly but was wondering if there was any thing else I should do?
Also, how do I dispose of the mercury and the broken thermometer?

Thanks

2006-12-04 10:31:30 · 8 answers · asked by Katie G 3

Describe the electrical conductivity of ionic substances in the solid, liquid, and aqueous solution phases.
And if u dont mind could u please answer what properties are associated witih compounds containing hydrogen bonds?

2006-12-04 10:28:53 · 1 answers · asked by Ballerina 5

a) Water is not a product

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

c) Nonionic species can appear in the net ionic equation

d) OH-(aq) does not appear in the net ionic equation

e) Cl -(aq) does not appear in the net ionic equation

2006-12-04 10:16:26 · 4 answers · asked by geebgeebgeeb 1

Aluminum hydroxide, Al(OH)3, is

a) an acid.
b) an amphoteric hydroxide.
c) a base.
d) an explosive hydroxide.
e) used to make amalgams.

2006-12-04 10:14:29 · 2 answers · asked by Ruphert J 1

It is Single replacement. Replacement of a metal with more reactive metals.

Can you check these to see if they are right?


Mg(s) + CuCl2(aq) ---------> MgCl2(aq) + Cu Is that right?

Zn(s) + Pb(NO3)2(aq) -----------> 2ZnNO3 + Pb

Cl2(g) + KI(that is a capital i)(aq) --------> 2ClI + 2K

2006-12-04 10:08:26 · 1 answers · asked by Traffic 4

2006-12-04 10:06:49 · 7 answers · asked by ken l 1

2006-12-04 10:02:53 · 3 answers · asked by Anonymous

Science;Chemistry.

2006-12-04 10:01:50 · 8 answers · asked by toribkeith 1

2006-12-04 09:58:27 · 3 answers · asked by ally c 1

Write an equation for the reaction of H+ with a solution containing both HCO3- and CO3 2-

(HCO3)- --> (CO3)2- +H+

2006-12-04 09:51:30 · 3 answers · asked by Dan 2

Please answer seriously..Thanx

2006-12-04 09:46:59 · 4 answers · asked by **ChaosAngel** 4

Which of the following hydrides is the most ionic?

a) LiH
b) NaH
c) CH4
d) NH3
e) RbH

2006-12-04 09:46:48 · 1 answers · asked by Ruphert J 1

Which one of the following is a covalent oxide?

a) BeO
b) MgO
c) K2O
d) Rb2O
e) CaO

2006-12-04 09:43:50 · 1 answers · asked by Ruphert J 1

Does mixing vinegar with baking soda explode faster than mixing vinegar, baking soda, and water?

2006-12-04 09:38:32 · 4 answers · asked by Anonymous

Is a solution of NaHCO3 and Na2CO3 a buffer solution? The answer is yes.

Then we have to explain using chemical equations:

NaHCO3 +H20--> H3O+ +Na2CO3

I dont know if that is correct.

2006-12-04 09:37:25 · 1 answers · asked by Dan 2

When atoms are bonded together covalently what two kinds of structure may result?
And How is a coordiante covalent bond diffrent from an ordinary covalnet bond?

2006-12-04 09:28:33 · 1 answers · asked by Ballerina 5

1)Suppose 8.00g of CH4 is allowed to burn in the presence of 6.00g of oxygen. How much (in grams) CH4, O2, CO2, and H2O remain after the reaction is complete?

I have CH4 - 16g/mol , O2 - 32g/mol , CO2 - 42g/mol , H2O 20g/mol

I know that this question has been asked earlier but they explained it but I could not understand the steps. So if someone could show me the steps on how to solve this I would love it. I have a test tomorrow and a question is going to be like this on it.

And this question I only ask for steps on how to do it. I want to find the answer and learn. I can figure out A but need help on B


2)Consider the combustion of methane, CH4:
CH4(g)+2O2(g) -->CO2(g)+2H2O(g)
Suppose 2.8 moles of methane are allowed to react with 3 moles of oxygen.
A)what is the limiting reagent
B)How many moles of CO2 can be made from this mixture? How many grams of CO2?

2006-12-04 09:17:03 · 1 answers · asked by fcb1012 2

1.) Define buffer in terms of its components.

2.)Write an equation for the reaction of H+ with a solution containing both HCO3- and CO3 2-.

3.) Write an equation for the reaction of OH- with a solution containing both HCO3- and CO3 2-.

4.) Is the solution of NaHCO3 and Na2CO3 a buffer solution? Explain using chemical equations.

These questions are for a Pre-lab. I was absent from school last week and need to finish this so I can do the lab tomorrow. Thanks for the answers.

2006-12-04 09:15:56 · 3 answers · asked by Dan 2

Magnesium reacts with dilute hydrochloric acid according to which of the following equations?

a) Mg + 2HCl → 2H+ + MgCl
b) Mg + 2HCl → H2 + MgCl2
c) Mg + 2HCl → Cl2 + MgH2
d) Mg + 2HCl → Cl2 + Mg2+ + 2H+

2006-12-04 09:10:49 · 5 answers · asked by farxfromxlonelyx 1