Chemistry - October 2006

9 year olds science homework

2006-10-03 04:27:25 · 15 answers · asked by helen o 1

I am stuck on a question it says:
Calculate the mass of nitrogen required to produce 250dm3 (decimeters cubed) of ammonia at 723K and 2.00 x 10^7 Pa. (the volume of 1 mole of any gas at 298K and 1.01 x 10^5 Pa is 24 dm3).
Please help! Do not waste my time by making smart comments like do it yourself you'll just be reported... Many thanks to those who answer seriously!!! :-)

2006-10-03 04:22:56 · 4 answers · asked by Anonymous

2006-10-03 04:19:04 · 2 answers · asked by Joseph DeLong 1

2006-10-03 04:11:02 · 1 answers · asked by Kara J 1

When u walk on dry sand u sink but when u walk on wet sand u dont. I have an idea but it could be wrong.

2006-10-03 04:08:14 · 2 answers · asked by Jamaican Dime 1

Although notated as PO4^(3-), the phosphorous-containing species actually present in an experiment as HPO4^ (2-) why is this?

2006-10-03 03:30:18 · 1 answers · asked by Anonymous

I have a few in mind but I'm not so sure. The help will be appreciated.

2006-10-03 03:27:22 · 3 answers · asked by Jamaican Dime 1

2 C4H10+ 13 O2--> 8 Co2+10 H2O

How many moles of water will form from 13 moles of O2 and 2 moles of C4H10


How many grams of H2O are formed in this reaction?


How many moles of O2 will react completely with 2 moles C4H10

How many moles of CO2 will form from 6.5 moles of O2? Assume you have 1 mole of C4H10

2006-10-03 03:24:04 · 2 answers · asked by cetinnovations 1

A. 9
B. 6
C. 3
D. 1

2006-10-03 01:54:20 · 4 answers · asked by cetinnovations 1

What is the final concentration of 3.5 L of 2.3 molar acid solution when it is diluted to 5 L by adding more water?


pls help me answer this....

2006-10-03 01:49:36 · 2 answers · asked by Anonymous

How much water must be added to 10 liter of 6 M solution to make it 3.8 M?

tell me what to do..

2006-10-03 01:43:50 · 2 answers · asked by Anonymous

Determine tha approximate volume of H2O that must be added to 200cubic cm. of 2.5 M solution to make it 0.75 M

tell me what to do....

2006-10-03 01:39:54 · 1 answers · asked by haler 1

Calculate the new concentration of a 1000cubic cm. of 1.5 M solution if after dilution its volume is 1,250cubic cm....

show me how to answer this?

2006-10-03 01:36:50 · 2 answers · asked by haler 1

2006-10-03 01:18:05 · 18 answers · asked by riya 1

What form does it take and how does it get to our sockets?

2006-10-03 01:16:50 · 7 answers · asked by lottie 3

Is there any reaction between Barium Sulfate and a Phosphate such as Phosphoric Acid,Trisodium Phosphate or Complex Phospahtes such as Sodium Hexametaphosphate?

2006-10-03 00:14:13 · 2 answers · asked by vitolopes 1

2006-10-02 23:46:11 · 4 answers · asked by aira_love21@yahoo.com 1

2006-10-02 23:31:01 · 16 answers · asked by lottie 3

2006-10-02 22:15:48 · 4 answers · asked by Anonymous

2006-10-02 21:59:00 · 8 answers · asked by Gareth 2

Ammonium sulphate is a fertiliser. How can you make it from an acid or alkali?

2006-10-02 21:47:30 · 8 answers · asked by Anonymous

I want to do the business of pest control and termite control and want exact guidance about exact chemicals o be used. Can anybody help me ?

2006-10-02 21:38:31 · 6 answers · asked by Anonymous

40% of N2O4 molecules are dissociated in a sample of gas at 27 degree celcius and 760 torr. The density of equilibrium mixture is
1) 2.7g/l 2) 2.8 g/l 3) 3.9 g/l 4) 4.9 g/l

2006-10-02 19:04:53 · 2 answers · asked by perceptor_07 2

If you use the form q = kA(T2-T1) and perform dimensional analysis on it, you would arrive at the units of k = W/(m^2*K). But do these units hold true in the differential form? dT/dt = -k(T2-T1)?

2006-10-02 18:56:51 · 2 answers · asked by JoeSchmo5819 4

2006-10-02 18:55:17 · 11 answers · asked by syed a 1

Chemistry, periodic elements

2006-10-02 18:52:03 · 9 answers · asked by a40yrovirgin 1

2006-10-02 18:46:06 · 16 answers · asked by Anonymous

IS the reaction of Zn(s) + 2HCl (aq) --> ZnCl2(aq) + H2(g) exo or endo thermic? Is work done by the system or on the system? Or none?

2006-10-02 18:34:09 · 4 answers · asked by Karan S 1

i have the answer i just dont know how to get it?

2006-10-02 18:12:13 · 3 answers · asked by tx_guy505 1

how much sodium would need to completely react 45.0 g of chlorine?

2006-10-02 17:50:12 · 3 answers · asked by feelinglikeastar 2