Chemistry - June 2007

a. increasing temperature
b. increasing surface area
c. increasing pressure

2007-06-08 05:36:47 · 8 answers · asked by Anonymous

a. large
b. nonpolar
c. polar

2007-06-08 05:33:19 · 9 answers · asked by Anonymous

a. nonpolar
b. ionic
c. polar

2007-06-08 05:32:30 · 6 answers · asked by Anonymous

change 57degrees Fahr. to celsius

2007-06-08 05:32:06 · 12 answers · asked by Zeke 1959 1

a. solubility
b. equilibrium
c. reactivity

2007-06-08 05:31:55 · 4 answers · asked by Anonymous

You know the number of grams of solute and the volume of solution. What is the first step in finding the molarity of the solution?


a. Divide grams by molar mass to determine number of moles.
b. Divide grams by volume of solution
c. Divide number of moles by volume of solution

2007-06-08 05:31:15 · 2 answers · asked by Anonymous

It seems like this forum is just a bunch of students asking for multiple choice or other answers of their homework problems. As a PhD chemist, I thought I might have something to offer. Is there somewhere else that people who really need help or want to better understand things go?

2007-06-08 05:31:06 · 2 answers · asked by mailrussell 1

pls. give proper reasoning..

2007-06-08 05:29:18 · 4 answers · asked by sush sauce 1

a. Use a magnet to attract the iron filings
b. Dissolve the salt in water, then filter and evaporate.
c. Decant the salt
d. Both a & b

2007-06-08 04:53:11 · 13 answers · asked by stimpy00777 1

the volume of 350mL of gas at 25degrees celsius is decreased to 125mL at constant pressure. what is the final temperature of the gas?-167, or -126, or 70, or 89, or 147

2007-06-08 04:30:42 · 3 answers · asked by mommy Ty 3

Calculate H S G for the following reaction using the following data:

2SO2+O2  2SO3

Substance H f k/j mol
S k/k * mol
SO2 -297 248
SO3 -396 257
O2 0 205

2007-06-08 04:11:54 · 1 answers · asked by Riley 1

Calculate S degrees for the following reaction:
2Ni S(s) + 3O2  2SO2 + 2NiO

Where S SO (2) =248 j/k mol

S NiO= 38 j/k mol

S O(2) =205 j/k mol
.

Ni S= 53 j/k mol

2007-06-08 04:02:29 · 1 answers · asked by Riley 1

im kinda lost, i cant find enough info bout this...help me out please

2007-06-08 03:53:49 · 1 answers · asked by mao_nerd90 2

a) 3.6 x 10^-3 M

b) 3.6 x 10^-3 M

c) 2.1 x 10^-4 M

d) 4.2 x 10^-4 M

2007-06-08 03:19:51 · 2 answers · asked by Steph 2

it was a popular flower here in the philippines..when you pull-out the hair-like thing inside its soft stem, a sweet liquid will came out,they said that it was the neactar..please help me!!

2007-06-08 03:13:42 · 3 answers · asked by tin-tin d 1

a. gas-liquid
b. liquid-liquid
c. solid-liquid

2007-06-08 03:08:25 · 3 answers · asked by degrassi_paige16 1

Explain how ionic radii influence crystal structure, and why they differ from atomic radii?

2007-06-08 02:10:30 · 3 answers · asked by Anonymous

when we place a water droplet on some surface..in moves in meanders but not in a straight path...why??.........im need of xact reason..may be in chemical or physical terms

2007-06-08 02:04:24 · 3 answers · asked by dia 2

2007-06-08 02:02:46 · 4 answers · asked by J 2

The vapor pressure of benzene is 400 Torr at 141.08 F and fell to 386 Torr when 19.0 g of an involatile organic compound was dissolved in 500 g of benzene. What is the molar mass of the involatile organic compound?

2007-06-07 23:07:42 · 1 answers · asked by richard 1

Please tell me how to make a pellet food. From liquid to pellet or from powder to pellet. Including the ingredients please. Thanks!

2007-06-07 22:50:17 · 1 answers · asked by jayveelim1323 2

the conc. in molarity?

also, why should the miliequivalents of two reacting substances be always equal? isn't it possible for 1 miliequivalent of a substance to react with 2 miliquivalents of another substance?

thanks:)

2007-06-07 22:10:33 · 1 answers · asked by tut_einstein 2

2007-06-07 20:32:26 · 5 answers · asked by nad j 1

2007-06-07 20:13:41 · 1 answers · asked by Anonymous

How does an oxygen water cooler get the oxygen into the water? does it really work or is it just another gimmick?

2007-06-07 19:03:11 · 1 answers · asked by Anonymous

Use table 3 to identify the strongest and weakest reducing agents among the substances listed within each of the following groupings:
a. Ca, Ag, Sn, Cl^-
b Fe, Hg, Al, Br^-
c. F^-, Pb, Mn^2+, Na
What is the directions telling me to do? Give an example for a.

2007-06-07 18:59:56 · 2 answers · asked by Anonymous

What is the equilibrium expression for the following reaction: CH4 (g) + Cl2 (g) CH3Cl (g) + HCl (g)? a)[Cl2][CH3Cl]/[CH4][HCl] b)[CH4][Cl2]/[CH3Cl][HCl]
c)[CH3Cl][HCl]/[CH4][Cl2]

What is the equilibrium expression for the following reaction: Hg (g) + I2 (g) HgI2 (g)? a)[HgI2]/[Hg][I2] b)[Hg][I2]/[HgI2]
c)[Hg]/[HgI2][I2]

What is the equilibrium expression for the following reaction: SnO2 (s) + 2 CO (g) Sn (s) + 2 CO2 (g)? a)[Sn][CO2]2/[SnO2][CO2] b)[SnO2][CO]2/[Sn][CO2]2
c)[CO2]2/[CO]2

What is the equilibrium expression for the following reaction: C (s) + CO2 (g) 2CO (g) a)[C][CO2]/[CO]2 b)[CO]2/[CO2]
c)[CO2]/[CO]2

2007-06-07 18:36:05 · 1 answers · asked by mac 1

2007-06-07 18:29:36 · 1 answers · asked by tut_einstein 2

2007-06-07 18:26:50 · 1 answers · asked by sunny 1

12. Why do ethers have a boiling point that falls between the boiling points of hydrocarbons and alcohols?
The ring structure of the molecule does not break apart
The carbonyl group that is attached gives them stronger intermolecular forces
The noble gas that is attached provides them with hydrogen bonding capabilities
The oxygen molecule creates dipole forces that are weaker than the intermolecular forces created from an alcohol molecule, but stronger than the intermolecular forces of the hydrocarbons

26. How are esters different from carboxylic acids?
the hydrogen on the carbonyl group is replaced with another R group
the hydrogen on the hydroxyl group is replaced with another R group
they are ionic compounds
they always contain three carbons in their parent chains

31. What is the name of the following molecule: CH3CH2CH2NH2?
propanamine
propanamide
1-propanamine
1-propanol

2007-06-07 18:16:52 · 2 answers · asked by qdark 3