Chemistry - September 2007

a) molecular mass and shape
b)charge
c)molecular mass
d)molecular shape

explanation please thanx

2007-09-16 02:05:57 · 2 answers · asked by azra k 1

turbidity which is due to suspension of very fine clay particles which are charged

2007-09-15 22:45:47 · 1 answers · asked by Anonymous

2007-09-15 22:42:16 · 4 answers · asked by - 3

The experiment observations was as follows: -
-HgClx dissolves in water to form a colourless solution.
-On adding H3PO2 a white suspension forms which rapidly turns to a grey suspension of droplets of metallic mercury.
-On further heating, the suspended droplets merge to form large drops of Hg(mercury) at the bottom of the beaker.

Several experiments was done using different masses of HgClx.

I plotted a graph of mass of Hg against mass of HgClx. Is this correct?
Also I got 0.71818 as slope(gradient) of the graph can i use it to find x in HgClx? If so how?
[Ar: Hg, 201.0: Cl, 35.5]
Thank you for any help in advance.

2007-09-15 22:38:08 · 1 answers · asked by polol 2

2007-09-15 22:22:22 · 5 answers · asked by rockygurl08 1

so far i have vinegar and lemon juice for acids, soap, battery, gaviscon, skin care products - could really do with more any help would be appreciated -thank you

2007-09-15 22:19:33 · 12 answers · asked by Anonymous

2007-09-15 22:13:23 · 8 answers · asked by Brigette 1

2007-09-15 22:04:31 · 1 answers · asked by Ms. Gorgeous 1

What is the general equation for this type of reaction?

2007-09-15 21:14:08 · 8 answers · asked by Brigette 1

For my Chemistry homework.
Please and thank you.
xx

2007-09-15 21:12:25 · 2 answers · asked by Anonymous

i'm so damn stuck..

1. Fe(s) + CuSO4(aq) --> Cu(s) + FeSO4(aq)
What mass of copper would be obtained if 1.0 kg of scrap iron was added to enough copper sulfate to react all the iron?

2. What mass of iron is produced by reacting 25g of zinc with excess iron (III) oxide according to the equation:
Fe2O3(s) + 3Zn (s) --> 3ZnO + 2Fe(s)

3. Hydrogen burns in oxygen to produce water.
(a) write a balanced equation for this reaction
(b) calculate the mass of oxygen required to react with 10.0 g
of hydrogen.


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Thanks heaps!! and just do what u could be bothered doing. much appreciated!! so are stars!

2007-09-15 20:49:08 · 4 answers · asked by jo 2

2007-09-15 20:08:47 · 3 answers · asked by Anonymous

2007-09-15 20:05:24 · 1 answers · asked by Anonymous

when determining the formula

2007-09-15 19:10:33 · 4 answers · asked by Anonymous

2007-09-15 19:02:18 · 2 answers · asked by Anonymous

Calculate the total number of molecules in the sample? How many atoms are present in the 2.8 mg sample?

2007-09-15 16:08:47 · 2 answers · asked by Will R 1

Determine the number of moles the following. N atoms in a sample of C7H5(NO2)2 that has the same number of O atoms as 50.0 g C6H12O6

2007-09-15 16:04:59 · 1 answers · asked by Anonymous

I don't understand how hard water is formed?

2007-09-15 16:00:14 · 4 answers · asked by Anonymous

I would like to have the wind and water element...suiton is pretty cool and fuuton is powerful.

2007-09-15 15:55:52 · 2 answers · asked by eric_jvr 1

weight of Ca 2+

2007-09-15 15:50:16 · 1 answers · asked by summitgirl06 1

i dont understand why fog and blood are considered heterogeneous mixtures. its confusing me.

2007-09-15 15:28:39 · 3 answers · asked by j 2

2007-09-15 15:27:46 · 3 answers · asked by mimi 1

a member of the same family as oxygen whose most stable ion contains 18 electrons

2007-09-15 15:10:53 · 4 answers · asked by summitgirl06 1

2007-09-15 14:48:48 · 2 answers · asked by Anonymous

1. wat is the diff. btwn molecular orbital, valence bond theory & atomic orbital?

2. what is hybrid orbitals

3. The important facts of the IMF

4. what is dipole moment

2007-09-15 14:37:38 · 1 answers · asked by candywhurl 1

Which one of the following can be done to shorten the half-life of the radioactive decay of uranium-238?

A. none of the above
B. freeze it
C. convert it to UF6
D. heat it
E. react it with an oxidizing agent


and how do u kno?

2007-09-15 14:18:54 · 2 answers · asked by desigoddess217 1

2007-09-15 14:12:22 · 2 answers · asked by Seena P 1

Which type of radioactive decay results in no change in mass number and atomic number for the starting nucleus?

A. gamma
B. alpha
C. positron emission
D. electron capture
E. electron emission

2007-09-15 14:11:15 · 2 answers · asked by desigoddess217 1

A) Dirty Air
B) Clean Air
C) Pencil
D) Ice
E) Iron
F) Silver Chloride
G) Salt Water
H) Ethanol

2007-09-15 14:05:32 · 2 answers · asked by Anonymous

Which one of the following processes results in an increase in the atomic number?

A. emission
B. corrosion
C. electron emission
D. positron emission
E. emission

2007-09-15 14:01:18 · 1 answers · asked by Anonymous