Chemistry - May 2007

Theres a fundamentals of chemistry class and a beginning chemistry class. Which class am I required to take for highschool credit?

2007-05-23 12:47:26 · 1 answers · asked by Andy 1

Best answer to whoever can solve AND explain this throughoughly.

2007-05-23 12:14:01 · 1 answers · asked by Bri 3

2007-05-23 11:39:27 · 3 answers · asked by Anonymous

2007-05-23 11:30:48 · 2 answers · asked by lost2007 1

Eh, I think that is what these are?? I need help, I have no idea what I'm doing, the book doesn't offer much solace. I'll show you the problem and my answers.

Determine whether each of the following reactions can occur. If the reaction does occur, write the complete, balanced equation. If the reaction does not occur, explain why not.


Problem 1: 2Cr(s) + SnCl4(aq) --->

My answer: Cr(s) + SnCl4(aq) ---> CrCl4(aq) + Sn


Problem 2: 2Ni(s) + MgSO4(aq) --->

My answer: This cannot happen, because Mg is more reactive than Ni.


Problem 3: Zn(s) + CdCl2(aq) --->

My answer: Zn(s) + CdCl2(aq) ---> ZnCl2(aq) + Cd(s)


Problem 4: Ag(s) + ZnCO3(aq) -->

My answer: This cannot happen, because Zn is more reactive than Ag.

2007-05-23 11:20:29 · 2 answers · asked by salmonella_jr 3

A reaction between copper and nitric acid, HNO3, produced copper (2) nitrate, Cu(NO3)2, nitrogen monoxide, NO, and water. Write the balanced chemical equation for this reaction.

Could you please run through the steps with me, if possible? I keep ending up with too many oxygen.

2007-05-23 11:03:53 · 2 answers · asked by salmonella_jr 3

I really need some help with chemistry and it would be nice if there was a site out there where you could type in problems and get answers OR an answer guide for my chemistry book..it called Chemistry A Contemporary Approach by Cohen and Geffner.

2007-05-23 10:58:46 · 4 answers · asked by Anonymous

Write a balanced chemical equation for the combustion of C2H2 gas. One of the products is carbon dioxide. Be sure to include states of matter.

(The 2's are subscripts.)

2007-05-23 10:56:10 · 2 answers · asked by salmonella_jr 3

2007-05-23 10:54:03 · 1 answers · asked by erikck 2

2007-05-23 10:51:31 · 1 answers · asked by Gary B 1

Can someone do this out for me? It is a practice prob I need to be able to understand to do my homework. Thanks. -The idiot

2007-05-23 10:50:25 · 2 answers · asked by Anonymous

I need to know the correct answer to this question to help study for an exam.

1. Explain each of the following observations using principles of atomic structure and/or bonding.
a.) Potassium has a lower first ionization energy than lithium.
b.) The ionic radius of the Nitrogen ion is larger than the oxide ion.
c.) A calcium atom is larger than a zinc atom.
d.) Boron has a lower first ionization energy than beryllium.

Thanks a lot for helping! I will give best answer..

2007-05-23 10:23:26 · 1 answers · asked by Danielle M 1

in group 2 and explain why

2007-05-23 10:20:45 · 4 answers · asked by 41 1

(b) Suppose 0.078 mol each of H2 and CO2 are placed in a 1.2 L container. When equilibrium is achieved at 986°C, what amounts of CO(g) and H2O(g), in moles, would be present? [Use the value of K calculated in part (a).]

the answer is 0.04
but is that correct significant figures

2007-05-23 10:06:12 · 2 answers · asked by taffy2343 1

2007-05-23 09:55:49 · 1 answers · asked by 41 1

2007-05-23 09:20:38 · 3 answers · asked by Anonymous

2007-05-23 08:34:38 · 5 answers · asked by Anonymous

dipole-dipole forces or london forces or hydrogen bonding or ion -dipole interactions or disulfide linkages

2007-05-23 08:28:36 · 2 answers · asked by mommy Ty 3

2007-05-23 08:16:20 · 8 answers · asked by waj 1

I heard that I can get the solutions manual to Bruice's Organic Chemistry 5th edition textbook on a torrent somewhere online but I've tried all of them and I couldn't find it. can anyone please help me out with this?

2007-05-23 08:16:00 · 2 answers · asked by Anonymous

Mg2+, K+, Al3+, Tl+, As3+

i need help!

2007-05-23 07:10:19 · 1 answers · asked by smile 1

2007-05-23 06:59:10 · 2 answers · asked by Nicole J 1

A certain compound contains two atoms of element x for every three atoms of sulphur (atomic mass 32.06).I f 10g of the compound contains 1.87g of sulphur , the atomic mass of x is

"give calculation process"

2007-05-23 06:57:58 · 4 answers · asked by Ram Latit P 1

2007-05-23 05:58:00 · 3 answers · asked by vannunu4 3

the answer is option(a)CH3Cl.....
shudnt it be CCl4...? it has more Cl, so more bond polarity, so more dipole moment?
plz give the answer in clear words (dont confuse me).........

2007-05-23 05:47:42 · 4 answers · asked by practico 1

I did a chemlab in the following procedure and need some help with questions.
1)Obtain acid in a 100ml erlenmeyer flask, add 35ml of unknown HCl soluton. 2) Add 2 drops of phenolphthalin indicator. 3) Fill buret with NaOH to end point - obtain 50ml buret and fill with 100m solution of NaOH. 4) Titrate NaOH into HCl solution to end point. Record initial buret volume and final volume.
Solution turned pink when there was only 11.4 ml left in buret.
a)Calculate average volume of base added and # of moles of base added. b)Calculate molar concentration of unknown hydrochloric acid solution c)it says to repeat titration 3 times and then asks why I needed to repeat the titration 3 times d)sodium hydroxide solutions react slowly with air. What effect would this have on the molar concentration of sodium hydroxide? What effect would this have on the calculated value of the concentration of hydrochloric acid? Justify answers
e) how could you use a pH meter to indicate end point of titration?

2007-05-23 05:43:23 · 2 answers · asked by flowers4eden 1

number of electrons

2007-05-23 05:34:35 · 5 answers · asked by raul a 1

number of electrons

2007-05-23 05:32:30 · 1 answers · asked by raul a 1

2007-05-23 05:26:33 · 1 answers · asked by alston 1

Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide gas?

2007-05-23 05:24:45 · 4 answers · asked by Stevie 1