Chemistry - April 2007

Which of the following have geometric isomers ?



a) [Co(H2O)4Cl2] +


b) [Co(H2O)3Cl3]


c) [Co(en)2(NH3)Br] 2+


d) [Pt(NH3)Cl3] −

2007-04-11 14:32:10 · 2 answers · asked by asiansenz 1

Hi, I just have two questions. Yes I know I should be doing my own work, but I can't find these answers on Google. Anyway,
I couldn't find the "common name" of a solution that uses water as the solvent and that uses alcohol as the solvent.


any help will be greatly appreciated, thankssssss! :)

2007-04-11 14:25:19 · 1 answers · asked by Stacey 3

2007-04-11 14:19:40 · 3 answers · asked by Kristina P 1

What are good sources to find out how chemistry is used to create lotions and cosmetics?

2007-04-11 14:17:49 · 2 answers · asked by cwalsh811 1

balanced formula for
magnesium sulfate heptahydrate + potassium carbonate --> magnesium carbonate + potassium sulfate + water

2007-04-11 14:12:51 · 1 answers · asked by lilprincess_2good4u 1

30.0mL of 0.300 M H3PO4 is mixed with 90.0mL of 0.200 M KOH and the mixture evaporated to dryness. Which salt will precipitate out: K3PO4, K2HPO4, KH2PO4 ? Show calculations

2007-04-11 13:53:59 · 7 answers · asked by angeybutt 1

It was found that 20.55mL of alkali was needed to neutralise the acid. What is the molarity of the acetic acid in the vinegar?

2007-04-11 13:51:23 · 4 answers · asked by angeybutt 1

why does salt dissolve in water?? i have a test tomorrow and i needed to khow how salt is dissolved in water?? thx for your help

2007-04-11 13:37:20 · 4 answers · asked by dragon 1

calculate the pH of 25.00 mL of 0.250 M HNO2 as it is being titrated with 0.100 M NaOH.

2007-04-11 13:31:49 · 2 answers · asked by mheg 1

okkkk so im in phyics but we have the state test and it deals with balancing equation. and i never had chem. soooo plz help
C2H6+O2 > CO2 + H2O


thanks

2007-04-11 13:17:13 · 1 answers · asked by Anonymous

a) How many unpaired electrons are in the d-orbital splitting diagram for the octahedral complex ion of

Fe2+ low spin




b) How many unpaired electrons are in the following complex ion

Ni(H2O)62+

2007-04-11 13:13:31 · 1 answers · asked by Christie 1

Solubility Table . . . need help please!?
This is the question I have to answer:
What is the minimum mass of water that will dissolve 80.0 grams of sucrose and 40.00 g of salt at 80 degrees celsius?

Given the following:
Solubility table
(g solute/ 100g of water)

Temp, Potassium dichromate, Sucrose, NaCl
0, 4.6, 181, 35.6
10, 6.6, 189, 35.7
20, 12.2, 200, 35.8
40, 26, 234, 36.3
60, 46.5, 289, 37.1
80, 70, 369, 38.0
100, 97, 476, 39.4

I have used commas to separate the columns
Please help! I don't understand how to do this.

2007-04-11 13:12:41 · 2 answers · asked by Anonymous

a) How many unpaired electrons are in the d-orbital splitting diagram for the octahedral complex ion of

Fe2+ high spin




b) How many unpaired electrons are in the following complex ion

Ru(NH3)62+ lowspin

2007-04-11 13:07:09 · 2 answers · asked by tiggerx313 1

If a reaction involved 10.4 moles of reactant how many kilojoules of heat were involved per mole of reactant? What I know is that delta T is 20 degrees Celsius and that after the reaction the temperature rose and that there was 2000. g of water surrounding the reaction and the specific heat of the surrounding water is 4.184 J/kg*K.

2007-04-11 13:04:31 · 1 answers · asked by <3DA<3 1

2007-04-11 12:59:19 · 2 answers · asked by autumnrose927 1

If its molar mass is determined to be 460. g/mol, determine its molecular formula and exact molar mass.

I think the empirical formula is C10H16O. If that is correct then I can do the rest of the problem. Can someone help me out?

2007-04-11 12:52:22 · 2 answers · asked by TwEeTy_576 1

a)What is the maximum mass of iron(III)oxide that can be obtained from 3632 g (8.000 lb) of iron?
b)What mass of O2 is required to oxidize the iron to iron (III) oxide?

2007-04-11 12:46:53 · 1 answers · asked by wonderer 1

Consider the following standard reduction potentials,

Under standard conditions,

a. Al3+(aq) is a stronger oxidizing agent than I2(s), and I-(aq) is a stronger reducing agent than Al(s).
b. I2(s) is a stronger oxidizing agent than Al3+(aq), and Al(s) is a stronger reducing agent than I-(aq).
c. Al(s) is a stronger oxidizing agent than I-(aq), and Al3+(aq) is a stronger reducing agent than I2(s).
d. I-(aq) is a stronger oxidizing agent than Al(s), and I2(s) is a stronger reducing agent than Al3+(aq).


whatt letter is the correct one?

2007-04-11 12:46:36 · 1 answers · asked by tasteslikegreen2006 1

folic acids
,gelatin,
Potassium sorbate,
Carnauba wax,
Xylitol,
modified food starch,
Coco processed with alkali,
Sodium alginate,
Sodium stearoyl lactylate,
Sucralose,
Acesulfame

2007-04-11 12:46:04 · 1 answers · asked by pjg898 2

2007-04-11 12:44:38 · 2 answers · asked by --Br0oklYn-- 5

Which of the following statements are true for the reaction


Ca(OH)2(aq) + HCl(aq) →



a) The only product is a salt


b) This is a neutralization reaction


c) When balanced, the stoichiometric coefficient of HCl is one


d) The pH of the resulting solution would be seven

2007-04-11 12:38:18 · 1 answers · asked by garture 1

A certain compound was found to have a molar mass of 60.095 g. A 1.705 g sample of this compound was burned in pure oxygen gas. The measured amount of CO2 produced was 3.746 g, while that of H2O was 2.044 g. No other products were produced in the reaction.

How many moles of carbon were in the original sample that underwent combustion ?

2007-04-11 12:37:18 · 3 answers · asked by garture 1

How hot will a 2.3 L balloon have to get to expand to a volume of 400 L? Assume that the initial temperature of the balloon is 25 degrees Celcius.

2007-04-11 12:24:38 · 1 answers · asked by kickitup21 1

I usually get this stuff, but for some reason i am not getting this. So.i have potassium, flourine, magnesium, boron as examples...anything will help

2007-04-11 11:37:06 · 3 answers · asked by ashleyhays89 1

a) [Co(H2O)4Cl2] +


b) [Co(H2O)3Cl3]


c) [Co(en)2(NH3)Br] 2+


d) [Pt(NH3)Cl3] −

2007-04-11 11:23:34 · 2 answers · asked by Anonymous

2007-04-11 11:00:19 · 4 answers · asked by darkraven_222000 1

If 20.00 ml of 0.2019 M HCl requires 39.63 mL of a NaOH sol'n for complete neutralization...

2007-04-11 10:57:17 · 3 answers · asked by Anonymous

I know this is review but i have tons of problems on percent composition and i need some refreshing. Thank you. :)

2007-04-11 10:46:45 · 5 answers · asked by Anonymous

What 2 kinds of energy changes can occur during a chemical reaction? Describe.

Are they endothermic & exothermic? Thanks.

2007-04-11 10:45:01 · 2 answers · asked by Alissa 2

For the coordination compound K2[CoCl4] give the oxidation state of the transition metal followed by the the coordination number.

2007-04-11 10:44:19 · 1 answers · asked by Christie 1