Chemistry - October 2007

2007-10-05 11:40:08 · 7 answers · asked by ♥the ish♥ 1

2007-10-05 11:35:14 · 0 answers · asked by me 2

I mean, is it usually done? Or, are these type of equations intended just for single and double displacement reactions?

2007-10-05 10:37:46 · 1 answers · asked by Chris D 1

Calculate how many cm3 of 1.00moldm-3 HCl acid are needed to decrease the pH of 1.00dm3 of HCl acid by one unit. Ignore the small change in volume!

2007-10-05 10:05:44 · 1 answers · asked by }{3@T 2

2007-10-05 10:03:19 · 5 answers · asked by tim c 2

2007-10-05 09:41:05 · 2 answers · asked by Anonymous

What do u think should go on this space?

Hydrogen deuterium and tritium are isotopes.

Isotopes are BLANK of an element which contain the same number of BLANNK and BLANK but different numbers of BLANK.

2007-10-05 09:37:25 · 2 answers · asked by resord72 1

If 26.24 mL of a standard 0.1650 M NaOH solution is required to neutralize 33.03 mL of H2SO4, what is the molarity of the acid solution?

Please explain your answer step by step. Thanks!

2007-10-05 09:01:55 · 3 answers · asked by Charleen 4

a. long chain fatty acid
b. micelle
c. short chain alcohol
d. long chain ester

2007-10-05 08:43:13 · 2 answers · asked by Anonymous

How much energy is released or consumed if 16.0g N2O5 of is completely decomposed as described?

Equation: 2N2O5 -> 4NO2 + O2

So this is what I have so far..

13.3kj/mol = N2O5
33.2kj/mol = NO3
0 kj/mol = O2

Then total h = 4(33.2kj/mol) - 2(13.3kj/mol) = 39.8kj/mol

What do I do now?

2007-10-05 08:33:36 · 1 answers · asked by Anonymous

a) H--H
b) O--Cl
c) Ca--F
d) Ca--O
e) Cl--F

2007-10-05 08:33:35 · 4 answers · asked by Got a quick Question.... 2

[H-C=N-H] +
(there are two dots on the top of the N!)


a) For this Lewis structure the number of valence electrons shown is correct
b) All of the atoms have an octet of electrons
c) In this Lewis structure the formal positive charge is on the carbon atom
d) This is the best Lewis structure for the molecule [HCNH]+

2007-10-05 08:28:05 · 2 answers · asked by Anonymous

A sample of solid naphthalene is introduced into an evacuated flask. Use the data below to calculate the equilibrium vapor pressure of naphthalene (C10H8) in the flask at 35°C.
===========ΔH°f (25°C)====ΔG°f (25°C)
C10H8(s)====78.5 kJ/mol=====201.6 kJ/mol

C10H8(g)====150.6 kJ/mol====224.1 kJ/mol



A) 890. mmHg
B) 0.21 mmHg
C) 696 mmHg
D) 0.086 mmHg
E) 833 mmHg

2007-10-05 08:11:40 · 1 answers · asked by Anonymous

a) Which of the following elements has the largest first ionization energy?

Po Ba Bi Pb

b) Which of the following has the smallest atomic radius?

Cl F Br I

2007-10-05 08:05:45 · 3 answers · asked by Got a quick Question.... 2

a. glucose
b. galactose
c. ribose
d. maltose

2007-10-05 08:03:06 · 3 answers · asked by Anonymous

i was watching a movie and these people made this person chug a carton of this yellow liquid, which was poisonous, and it made him automatically bleed like in his mouth. i was wondering if it was anti-freeze or what was it?lol

2007-10-05 07:24:39 · 10 answers · asked by casey 2

I used copper sulphate solution as electrolyte and then tried with Sodium chloride and dilute acids .All cases in place of copper I found black material is depositing on cathode.any one suggest a good electrolyte for copper plating?

2007-10-05 07:20:31 · 1 answers · asked by kuriaksabu 1

Show work.

2007-10-05 06:54:33 · 3 answers · asked by bumblebee 4

2007-10-05 06:50:40 · 3 answers · asked by lauren b 1

I have been treating my dry skin on my hand with a solution of 1 cup epsom salt to one gallon of very hot water an then soaking it for 15 minutes and it seems to be working really well. I Was just curious that if I added peroxide to the solution would it be able to kill off what ever is causing the dry skin to begin with.

2007-10-05 06:48:23 · 1 answers · asked by zippy_dell 3

A. concentrated
B. unsaturated
C. saturated
D. dilute

2007-10-05 06:22:22 · 12 answers · asked by Anonymous

metal.
A. carbon
B. oxygen
C. hydrogen
D. nitrogen

2007-10-05 06:19:11 · 3 answers · asked by Anonymous

simple words pls..

2007-10-05 06:04:44 · 6 answers · asked by nutashuh. 1

Something to do with carbon hardening it for bridges. Steel alloy...

2007-10-05 05:58:33 · 4 answers · asked by Anonymous

2007-10-05 05:54:50 · 4 answers · asked by nutashuh. 1

2007-10-05 05:48:49 · 3 answers · asked by swole 1

2) Zinc (metal) and Aqueous Hydrochloric acid.

2007-10-05 05:36:54 · 5 answers · asked by sarah 87 1

The procedure calls for glacial acetic acid can I use the glacial acetic acid directly form the bottle with the RMM 60
please help.

2007-10-05 05:36:31 · 3 answers · asked by Lucy 2

and please explain how you got it. thanx

2007-10-05 05:25:23 · 1 answers · asked by sunnydaze34509xoxo 2

How many mL of 1M CuSO4 is needed for 1g Zn to completely react based on the equation : Zn(s) + CuSO4(aq) --> Cu(s) + ZnSO4(aq)
Answer: 15.3mL

2007-10-05 05:24:27 · 1 answers · asked by g2hn 3