Chemistry - October 2007

A sample of 0.3220 g of an ionic compound containing the bromide ion (Br-) is dissolved in water and treated with an excess of AgNO3. If the mass of the AgBr precipitate that forms is 0.6364 g, what is the percent by mass of Br in the original compound?

2007-10-01 10:06:18 · 4 answers · asked by ws 3

OK her here my questions.
Is 0(small 3)(ozone) a gas?
Is C2H5OH (alcohal) a liquid,gas or solid
what is the chemical formula for stomach acid and what is its IUPAC name?
What is a common use for iodine?
lastly what is the chemical formula and IUPAC name for carbonated beverages?

2007-10-01 10:01:43 · 2 answers · asked by Anonymous

A. an outer energy level
B. a valence electron
C. a neutron
D. a proton

2007-10-01 09:48:57 · 4 answers · asked by Anonymous

HELP ASSAP

2007-10-01 09:44:22 · 3 answers · asked by DisneyGirl23 3

i believe that the burning of phenol will produce H2O, CO2 & blue flame of diatomic carbon which is the origin of life? these chemicals existed in the pre-evolutionary period of earth.

2007-10-01 09:37:26 · 1 answers · asked by ron.waters 1

alcohols, ketones....etc I see that there are many different types does this mean that pheromones are its own different family:???

2007-10-01 09:36:15 · 1 answers · asked by Nohart X 1

A an outer energy level
B a valenence electron
C a neutron
D a proton

2007-10-01 08:14:59 · 1 answers · asked by Anonymous

A Ag
B Ag+
C S
D S2-

2007-10-01 08:11:22 · 3 answers · asked by Anonymous

...to reduce 23.3 mL of a 0.374 M KMnO4 solution according to the following equation?

10 HI + 2 KMnO4 + 3 H2SO4 5 I2 + 2 MnSO4 + K2SO4 + 8 H2O

2007-10-01 08:04:46 · 1 answers · asked by jvt022285 1

1) 1 molal CaCl2
2) 1 molal NaNl
3) 1 molal C12H22O11
4) 2 molal C6H12O6

2007-10-01 08:01:39 · 1 answers · asked by Anonymous

someone help me with these 2 problems..it says write each number in standard notation.

1) 5x10^-2

2) 2.04x10^3

2007-10-01 08:00:00 · 5 answers · asked by Anonymous

Na_2SO_4 + AgNO_3

2007-10-01 07:42:33 · 4 answers · asked by Anonymous

...is dissolved in water and treated with an excess of AgNO3. If the mass of the AgBr precipitate that forms is 0.6064 g, what is the percent by mass of Br in the original compound? = ___%?

2007-10-01 07:38:39 · 2 answers · asked by eclipsegt_01_03 2

which we would write [Ar]4s23d6

Give the electron configuration for the element

Sb

using the above computer format.

Account for all the electrons in the element. Do not leave out filled inner subshells.

2007-10-01 07:33:24 · 1 answers · asked by Got a quick Question.... 2

A. redox reaction
B. loss of electrons
C. half-reaction
D. agent

2007-10-01 07:32:15 · 3 answers · asked by Anonymous

A. oxidation
B. reduction
C. redox
D. combination

2007-10-01 07:30:29 · 1 answers · asked by Anonymous

A. silver metal
B. silver sulfide
C. silver oxide
D. hydrogen sulfide

2007-10-01 07:29:00 · 10 answers · asked by Anonymous

A. Fe2O3
B. Al2O3
C. Al
D. Fe

2007-10-01 07:28:17 · 3 answers · asked by Anonymous

2007-10-01 07:27:32 · 3 answers · asked by Anonymous

A. stays the same
B. decreases
C. increases
D. may increase or decrease

2007-10-01 07:27:05 · 1 answers · asked by Anonymous

A. oxygen
B. hydrogen
C. a metal
D. a reduction reaction

2007-10-01 07:25:49 · 4 answers · asked by Anonymous

Being a galvanized nail reacting first to vinegar, then the steel(iron) nail then the nickel and last the penny(copper) as the last reactant to react to vinegar.

2007-10-01 07:24:57 · 1 answers · asked by Anonymous

2007-10-01 07:14:16 · 2 answers · asked by Anonymous

I think it is 0.0085 cm^3 but not sure about my answer

2007-10-01 07:12:00 · 2 answers · asked by mohjd s 1

I'm doing this experiment and i have to write down the order from least to most reactive. The experiment consisted of 4 cups with vinegar and each cup had a metal in it. Metals were: galvanized nail, steel nail(iron), nickel and a penny. I had to watch over the next few days as to what happens to the 4 metals.

2007-10-01 07:11:04 · 1 answers · asked by Anonymous

body temperature is 37 c and i have ot find it on the v scale...
thanks

2007-10-01 07:10:20 · 1 answers · asked by mohjd s 1

why is uranium dangerous?
why is platinum used for jewellery?
why is mercury used in thermometers?

2007-10-01 07:05:08 · 2 answers · asked by Anonymous

2007-10-01 07:04:52 · 1 answers · asked by RogerDodger 1

1.What is the type of matter change where you cannot determine original substances, and new substances are formed?

2.What is the type of matter change in which matter stays the same and no new substances are formed?

3.What is anything that takes up space and has mass?

4.What is the type of chemical reaction in which heat is absorbed?

5.What is the type of chemical reaction in which heat is given off?

2007-10-01 06:57:39 · 5 answers · asked by V.S. 2

ok, the question is:
mercury is traded by the "flask" a unit that has a mass of 34.5 kg. what is the volume of the flask of mercury if the density of mercury is 13.5g/mL?
can you work it out, and show me how to get to the answer?

2007-10-01 06:54:47 · 1 answers · asked by ashesanne 2