Chemistry - February 2007

2AgNO3+ BaCL2-------- 2AgCl+Ba(NO3)2
how much of barium chloride is necessary to react with the silver nitrate in this problem

2007-02-25 06:57:12 · 3 answers · asked by racquel b 1

N2 + 3H(2)------ 2NH(3)

HOW MANY GRAMS OF AMMONIA IS PRODUCED IN THIS REACTION

2007-02-25 06:53:34 · 5 answers · asked by racquel b 1

Heehee. Assignments! Loaded..kindly help me. Please?

2007-02-25 06:52:24 · 2 answers · asked by Anonymous

Draw a structural formulae for two pairs of geometric isomers having the formula C6H12, displaying the trigonal planar bonding on the C=C in each formula. Please name each isomer.

2007-02-25 06:50:09 · 2 answers · asked by Anonymous

The pressure is increased from 0.2 atm to 0.4 atm, while the temperature is decreased from 315°C to 150°C.

i know the volume will decrease, but how do i solve for the volume?

2007-02-25 06:50:02 · 2 answers · asked by pinay804 2

Another assignment. Quick! Quick! Answer now..only an hour an a half to go! Thanks to all!

2007-02-25 06:46:41 · 1 answers · asked by Anonymous

i made some concrete forms, and used some of this 2" riged foam from the home center to use as removable centers in the molds, now how to remove? i know gas will disolve styrofoam cups, but i think this is a different, more dense foam. thanks john

2007-02-25 06:35:59 · 1 answers · asked by johnhassay 2

So How Are They Named?!

2007-02-25 06:15:04 · 1 answers · asked by Anonymous

ALSO!
- what % of the atmosphere do they make up?
-And could you name 1 use for each?

2007-02-25 06:08:25 · 13 answers · asked by ummm.... 1

need this to store heat so it can be conducted through an element...

2007-02-25 06:04:04 · 3 answers · asked by dr.macgruder 4

Whats The Diffrence?!
++ What is the significance of the Roman numerals?

2007-02-25 06:03:14 · 5 answers · asked by Anonymous

C7H8+HNO3--->C7H5H3C6+H2O ..The chemical equation is used in the production of TNT.

2007-02-25 06:03:05 · 1 answers · asked by Toothie 2

2007-02-25 05:55:14 · 4 answers · asked by Anonymous

would the specific heat increase, decrease or remain about the same? i don't know whether it would increase, due to more hydrogen bonds or something, stay the same, or decrease due to introduction of substances with a lower specific heat...

2007-02-25 05:48:40 · 2 answers · asked by Anonymous

Could you explain to me how you know the answer thanks.

2007-02-25 05:37:47 · 6 answers · asked by Randy 1

2007-02-25 05:36:02 · 1 answers · asked by Anonymous

I need help with my science class. Plz answer. Plus if you dont mind can you answer these too?:
The number of protons can be determined by looking at what on the periodic table?

What was the four elements that Archimedes thought there was in the world?

Moseley ordered the elements on the periodic table according to what?

The periodic table is currently ordered by what?

What are three characteristics of metals, nonmetals,and metalloids?

What do elements in the same family have in common?

What do elements in the same periods have in common?

Why are the Lanthanide and actinide series at the bottom of the periodic table?

The symbols for the elements sometimes dont make sense to us. Why is that?


Plz someone help. In return ill try to answer your questions if I see any. But if you are able to answer all of these questions I doubt you would really ask anything.........^_^

2007-02-25 05:29:48 · 5 answers · asked by colinm_1 1

i used 500 grams of salt and 17cc of water.

2007-02-25 05:19:15 · 6 answers · asked by David M 1

Basically:
CaO + SiO2 → _____
↑
Sorry can't do the little 2 after O

Please give the chemical formula as well as its name!

Thanks!!

2007-02-25 05:16:11 · 4 answers · asked by Anonymous

Hi, I have an Inorganic Lab exam soon, and the practice test is asking how many neighbors spheres have in both hexagonal close packing (ABAB) and cubic close packing (ABCABC). It also asks which one leads to the face centered cubic unit cell. Thanks a lot! We don't have a textbook for this class and I am terrible at visualizing.

2007-02-25 05:13:43 · 1 answers · asked by salsablaeu 2

How do I go about this without knowing any numbers?

Calculate ΔHorxn for the following equation:
SiO2(s) + 4HF(g) → SiF4(g) + 2H2O(g)

2007-02-25 05:06:07 · 2 answers · asked by lilbree321 1

Which type of intermolecular interaction (molecular, ionic, metallic, network) is lithium fluoride, carbon tetrachloride, sodium, and silicon carbide?

2007-02-25 05:02:21 · 1 answers · asked by untilyoucamealong04 3

When a 2.000 gram sample of pure phenol, C6H5OH(s), is completely burned according to the equation below, 65.98 kJ of heat is released.

C6H5OH(s) + 7 O2(g) → 6 CO2(g) + 3 H2O(l)

(b) Calculate the standard heat of formation, ΔH°f, of phenol in kilojoules per mole at 25°C.

knowing that
DHf of CO2 = -395.5
DHf of H2O (l) is -285.85


Thanks in advance,

2007-02-25 05:01:54 · 2 answers · asked by Anonymous

Why is quinine soluble in water the structure is on the link.
http://www.steve.gb.com/images/molecules/alkaloids/quinine.png

2007-02-25 05:01:06 · 2 answers · asked by Shane 1

I have a question that says: how many molecules of hydrogen peroxide were in the whole bottle? and i have to calculate the number of molecules using a density... how is that possible?

2007-02-25 04:59:59 · 3 answers · asked by Lily K 1

2007-02-25 04:54:12 · 1 answers · asked by erikck 2

Explain why some objects floar while others sink. It has something to do with water displacement. Can you explain how much it has to displace to float, and whether it's the density or mass or volume of water that is displaced.

2007-02-25 04:49:28 · 3 answers · asked by Anonymous

I Need Information about Potassium the element Asap

2007-02-25 04:48:49 · 1 answers · asked by Alyssa 1

I have no idea how to set up these equations. If someone would help me set them up, I could do the rest! Thanks!

A sample of Mg (specific heat = 1.024-J/g°C) weighing 209.9-g is boiled in water at sea level until it reaches 100.0°C.
The sample is dumped into a coffee cup containing an unknown mass of water that had reached equilibrium temperature 24.6°C.
The temperature of the water and Mg rose to 43.5°C.
Assuming that no heat is absorded by the coffee cup, what was the mass of the water in the coffee cup. (in grams)

A sample of Al (specific heat = 0.900-J/g°C) weighing 227.8-g is boiled in water at sea level until it reaches 100.0°C.
The sample is dumped into a coffee cup containing 63.8-g of water that had reached equilibrium temperature 24.6°C.
The temperature of the water rose. Assuming that no heat is absorded by the coffee cup, what was the final temperature in°C?

2007-02-25 04:36:12 · 1 answers · asked by lilbree321 1

How does determining the standard heat of formation differ from using bond energies to determine the "triangle"H* of a reaction?

2007-02-25 04:27:48 · 1 answers · asked by treatyourself_well 1