Chemistry - May 2007

2007-05-29 10:50:04 · 1 answers · asked by mkeeba 1

0.1ml NADH and 0.01ml pyruvate in the assay.

were given 3.4mM NADH and 30mM so what would the concentrations be in the assay?

2007-05-29 10:40:40 · 1 answers · asked by Anonymous

It has to be online (I live a long way from the library), and it has to be a website that doesn't require me to register or pay. I'm testing an unknown substance in a lab and I need to know the chemical formula from concluding from these tests.

Any websites on the web that can grant me a chemical formula through my test results???

thanx a whole lots!

2007-05-29 10:12:52 · 2 answers · asked by Anonymous

2007-05-29 10:07:49 · 2 answers · asked by Anonymous

How would I calculate the concentration of a monoprotic basic solution given that 99.3mL of the basic solution is neutralized by 83.0mL of a 0.0325M solution of HCl?

2007-05-29 09:55:08 · 1 answers · asked by glance 3

How likely would it be for carbon monoxide buildup to be ignited by a car engine?? What temperature does it combust?? Will it only explode if it touches an open flame?

2007-05-29 09:46:52 · 1 answers · asked by Anonymous

2007-05-29 09:42:59 · 3 answers · asked by Camden O 2

2007-05-29 09:32:47 · 1 answers · asked by xxbillyroxmyworldxx 1

2007-05-29 09:30:22 · 4 answers · asked by Anonymous

2007-05-29 09:29:15 · 5 answers · asked by xxbillyroxmyworldxx 1

did it work?

2007-05-29 09:27:42 · 5 answers · asked by Anonymous

A 9.92 g sample of methane, CH4, is burned in excess oxygen producing carbon dioxide gas and liquid water. The reaction occurs in a calorimeter surrounded by 2.50 kg of Include the sign in your answer. Assume the heat released by the reaction is completely asborbed by the water. Use a molar mass of 16.04 g/mol for methane.

2007-05-29 09:17:55 · 1 answers · asked by bibbitybobbyboo22 2

1.which equation is balanced?
a. 2NaCl+H2SO4 ---> HCL+NaSO4
b. NH3+H2O ---> 2NH4OH
c. KOH+H2SO4 ---> KHSO4+H2O
d. 2Na+S ---> 2NaS

2.which group of chemical compounds is composed of entirely organic compounds?
a. C2H4O, CH2O, CaSO4, C3H5(OH)3
b. C6H6, C2H5OH, C6H5CH3, C3H5(NO3)3
c. C2H2, CH4, CaCl2, CaCN2
d. Ch3OCH3, Ca3(PO4)2, CO2, H2CO3

3.In the chemical equation :
Zn+2HCL --> ZnCl2+H2 the reactants are...
a.zinc chloride & hydrogen
b.zinc & hydrogen carbonate
c.zinc chlorate & water
d.zinc & hydrochloric acid

4.the valence of aluminum is +3 & the valence of chlorine is -1 what is the formula for aluminum chloride?
a.Al3Cl
b.AlCl3
c.ClAl3
d.Cl3Al

5.The names of the compounds:
FeS, NaCl, NaOH & Pb(CN)2 all end in the suffix
a.-ide
b.-ite
c.-ic
d.-ate

6.Which is the balanced form of this equation
CO2+C --->CO
a.2CO2+C ---> CO
b.CO2+C --->2CO
c.CO2+C2 --->CO
d.CO2+C --->C2O

7.Which represents aldehyde
a.C6H10O5
b.C2H4O
c.C2H5OH
d,CH3COOH

2007-05-29 09:11:37 · 3 answers · asked by Anonymous

1. 1,1-dichlorobutane 2. 1,2-dichlorobutane 3. 2,2-dichlorobutane 4. 1,12,2-tetrachlorobutane

2007-05-29 09:06:09 · 2 answers · asked by Anonymous

i have an idea like you roll a dice then u move in order and have to answer a question about that element but if you get the answer wrong what should u do?

2007-05-29 09:03:34 · 2 answers · asked by bballgirljv 1

2007-05-29 09:02:20 · 1 answers · asked by Marcia P 1

I'm trying to find the mass of acetice acid in vinegar.
Here is the information given:
Mass of vinegar: 8g
Volume of vinegar: 10mL
Volume of NaOH: 22.8mL
Concentration of NaOH: 1mol/L
NaOH + HC2H3O2 --> NaC2H3O2 + H2O

How do you arrive at the answer?
Thank you !!

2007-05-29 08:52:04 · 4 answers · asked by C'est Comme Un Rêve 3

I have to determine a specific property of water based on its hydrogen bonding to itself or other polar molecules. --I can not just say that water is attracted to itself. but rather have to explain what the attraction produces.

**Thanks so much for your help!

2007-05-29 08:44:22 · 3 answers · asked by systematicalf 2

A 4.69 g sample of propane, C3H8, is burned in excess oxygen producing carbon dioxide gas and liquid water. The reaction occurs in a calorimeter surrounded by 1.52 kg of water resulting in a temperature change from 23.9°C to 50.1°C. Include the sign in your answer. Assume the heat released by the reaction is completely asborbed by the water.

2007-05-29 08:43:39 · 3 answers · asked by bibbitybobbyboo22 2

If you start with 85.9 g of sodium sulfate and 13.9 g carbon, calculate the maximum mass of sodium sulfide that could be

Na2SO4(s) + 4C(s) Na2S(s) + 4CO(g)
This is the question and I have no idea what to do and I need to know how to do this question in order to answer 2 other questions.

2007-05-29 08:38:27 · 2 answers · asked by bibbitybobbyboo22 2

Both 2-chloropropane and 2-iodopropane form the same organic product in the reaction with aqueous silver nitrate what is the structural formula of this product.

Also why when calculating the enthalpy change of combustion is it simply Q=CdeltaT = and then divide by moles rather than Q=cmdeltaT as it is for the enthalpy change of formation?

thanks a lot

2007-05-29 08:05:51 · 1 answers · asked by Anonymous

Argon, nitrogen, oxygen, carbon dioxide, trace elements, water vapor. Which is the most massive?

2007-05-29 07:14:17 · 5 answers · asked by tjcsonofallnations 3

pharmaceutical compounding

2007-05-29 06:52:42 · 1 answers · asked by Anonymous

What pathway would decay lead-214 to thallium-210?

A. An alpha and a beta emission
B. An alpha emission
C. Two alpha emissions
D. Two beta emissions
E. A beta emission

2007-05-29 06:32:05 · 1 answers · asked by MEB 2

Im trying to make a smoke bomb

2007-05-29 06:28:34 · 4 answers · asked by Anonymous

I need to know THE EFFEECT OF CARBOHYDRATE ON VO2 MAX.
It'll be better if you give me a link of the source of your research.

2007-05-29 06:27:13 · 1 answers · asked by softstd 1

I keep seeing words like triethanolamine and diethylmethylamine... but what exactly is that chemical?

2007-05-29 06:25:42 · 7 answers · asked by naturalplastics 4

Can anyone tell me why the misconseption is incorrect, and what is the correct conseption.

2007-05-29 06:10:21 · 3 answers · asked by Julia K 1

2007-05-29 05:50:44 · 1 answers · asked by michael a 1

a gas, at room temperature, would fill the same volume as that occupied by 350 grams of carbon monoxide at 75degree C and 575 Torr?

2007-05-29 05:47:52 · 1 answers · asked by BIG X 2