Chemistry - March 2007

do you know the name

2007-03-17 14:30:16 · 2 answers · asked by Samy p 1

2007-03-17 14:22:34 · 3 answers · asked by Anonymous

Animals eat plants and some animals eat other animals. What special compounds in the body of an animal contain the carbon atoms from the plants?

2007-03-17 14:10:13 · 4 answers · asked by Anonymous

(a) alkaline
(b) acidic
(c) ionate
(d) basic
(e) neutral

Why?

2007-03-17 14:10:08 · 3 answers · asked by Fry with Ketchup 1

How can you determine if the molar solubility of a solution will be affected by the pH?
for examplewhich will not be affected by pH
a.Na2Co3 b.NaF c. FePO4 d. KClO4 e.NiS. I dont necessarily need an answer I just want to know how to determine this. thanks

2007-03-17 13:55:07 · 2 answers · asked by Anonymous

Is it A,B,C,D, OR E?
A) The energy of photon 2 is greater than photon 1.
B) The frequency of photon 2 is greater than photon 1.
C) The sign of the energy of photon 1 is the opposite of the sign of the energy of photon 2.
D) The wavelength of photon 2 is greater than photon 1.
E) The mass of photon 2 is greater than the mass of photon 1.

2007-03-17 13:40:20 · 2 answers · asked by ♥ReKa♥ 2

i already know that it was discovered by sir humphrey davy [an english man] so im guessing england! hurry guys! i need help!

2007-03-17 13:21:49 · 1 answers · asked by prunkibabe619 2

Why is camphor soluble in alcohol and ethers, but insoluble in water?

2007-03-17 13:02:39 · 1 answers · asked by solomon d 1

who do i write a balance equation for the following two reactions?
Iron metal and chlorine gas react to form solid iron(III) chloride.

Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide gas.

2007-03-17 12:54:21 · 3 answers · asked by myplan 1

1. does sand have a covalent or ionic bond?

2. does baking soda have a covalent or ionic bond?

and how can you tell the difference between these bonds

2007-03-17 12:48:47 · 7 answers · asked by Anonymous

Is it 1 or 3. I have had different chemistry teachers tell me different answers. Please explain why, or direct me to some authoratative source.

2007-03-17 12:26:34 · 7 answers · asked by Anonymous

HELP!!!!!

2007-03-17 12:24:15 · 2 answers · asked by IwantAnswers 1

2007-03-17 12:19:11 · 4 answers · asked by Jimmy and Shelb 2

Please help me fill in this chart! Just draw a line between acids and bases and lines betweens the Physical Properties
Reaction with metals
Reaction with carbonates
Effect on indicators
Type of element in formula
Examples
and it will look more like a chart.



Acid Bases
Physical Properties
Reaction with metals
Reaction with carbonates
Effect on indicators
Type of element in formula
Examples

2007-03-17 12:15:43 · 1 answers · asked by usererrorunknown 1

HELP!!!!!!!!!!

2007-03-17 12:11:30 · 3 answers · asked by IwantAnswers 1

I am in chemE major in UCSB and recently I've been thinking if I should switch to chemstry B.S. major or stay in chemE. Which one earns more $? And which one is more useful?

2007-03-17 12:06:39 · 6 answers · asked by Leon 2

Challenge Problem:
The element europium exists in nature as two isotopes: 151Eu has a mass of 150.9196 amu, and 153Eu has a mass of 152.9209 amu. The average atomic mass of europium is 151.96 amu. Calculate the relative percent abundance of the two europium isotopes.
Hint: what do you know about the sum of the two percent abundances?


*The answer isnt 33 and 67 or 52 and 48. *

2007-03-17 12:03:11 · 4 answers · asked by ♥ReKa♥ 2

To make a solution with a pH = 3.80 a student used the following procedure :
a certain amount of sodium acetate along with 0.300 moles of acetic acid is added to enough water to make a solution of 1.00 L
How many grams of sodium acetate were added ?

Ka = 1.80 x 10-5

2007-03-17 11:58:06 · 1 answers · asked by Anonymous

Which of the following solutions result in a buffer ?



a) 0.100 L of 0.250 M CH3COOH + 0.050 L of 0.250 M NaOH


b) 0.100 L of 0.250 M CH3COOH + 0.050 L of 0.250 M HCl


c) 0.050 L of 0.250 M CH3COONa + 0.100 L of 0.250 M HCl


d) 0.100 L of 0.250 M CH3COONa + 0.050 L of 0.250 M HCl

2007-03-17 11:56:13 · 2 answers · asked by Anonymous

2007-03-17 11:51:09 · 1 answers · asked by the dude 1

2007-03-17 11:34:30 · 4 answers · asked by □□□□□ 2

Please dont get too detailed, but a little is fine.

2007-03-17 11:31:29 · 5 answers · asked by □□□□□ 2

how do i extract fuel from banana fibers? should i put the fibers in water and let it boil, then freeze the product and scrape off the oil? hey, what should i do?

2007-03-17 11:14:35 · 1 answers · asked by junified.bea 1

bio-chemistry, cheeto, calorimeter, calories

2007-03-17 11:06:08 · 2 answers · asked by gemmaismystar 1

What properties of a molecule or ion make the species a good ligand for forming complexes with transition metal ions?

2007-03-17 10:44:07 · 1 answers · asked by watercurves 6

What are the properties of ligands and what properties of ligands make it a strong ligand?

2007-03-17 10:42:30 · 1 answers · asked by watercurves 6

Which of the following solutions result in a buffer ?


a) 0.100 L of 0.250 M NH3 + 0.050 L of 0.250 M HCl


b) 0.100 L of 0.250 M NH3 + 0.100 L of 0.250 M HCl


c) 0.100 L of 0.250 M NH4Cl + 0.050 L of 0.250 M NaOH


d) 0.100 L of 0.250 M NH4Cl + 0.150 L of 0.250 M NaOH

2007-03-17 10:40:58 · 1 answers · asked by stargazer 2

a. What happened to the concentration of each of the ions when the KBr was added?

b. What would happen to the value of K?

c. Explain why the solution changed color.

d. Would the tube feel hot or cold when the KBr was added?

Methanol has the formula CH3OH and can be produced by the reaction of carbon monoxide with hydrogen gas.


CO + 2 H2 CH3OH + heat


In an attempt to maximize the yield of methanol (amount of methanol produced), a chemist would try to shift the equilibrium as far to the right as possible. Which of the following would accomplish this?
a. heating the mixture
b. adding an excess of carbon monoxide
c. removing the methanol as it is formed
d. adding a substance that reacts with carbon monoxide

2007-03-17 10:40:52 · 1 answers · asked by sol 2

The folowing questions are questions I was given for a review for my final assessment in my Chemistry class. I wanted some help to make sure I was studying the correct answers and ways of answering these questions. Any helpful input is very much appreciated.
1. What is the difference between an oxidizing agent and a reducing agent?
2. When first learning to balance equations, we learned that the number of atoms of each element in the products and reactants must be equivalent. What are some additional factors that must be taken into account when balancing equations for redox reactions?
3. What are half reactions?
4. What two aspects of the half-reaction equations must be balanced?
5. For the equation Ag + NO3 -  Ag + + NO
This reaction takes place in an acidic solution.
What substance is reduced?
What substance is oxidized?
What is the half reaction for oxidation?
What is the half reaction for reduction?
What is the net balanced equation?
What is the reduced equation?

2007-03-17 10:40:52 · 1 answers · asked by Anonymous

2007-03-17 10:34:46 · 3 answers · asked by nikki 2