Chemistry - May 2007

i need some indicators i can test with .......... and it is for a project so some substantial info like for a full on project..... thank u ..... really need this help

2007-05-31 06:47:31 · 1 answers · asked by tanya 1

Which of the following properties is associated with the value of the mλ quantum number?

a.the orientation in space of an orbital
b.the number of electrons in an orbital
c.the size of an orbital
d.the energy of an orbital
e.the shape of an orbital

2007-05-31 06:44:55 · 2 answers · asked by Anonymous

What is the binding energy of an electron in a photosensitive metal (in kJ/mol) if the minimum frequency of light that can eject electrons from the metal is 6.30 × 1014 Hz?

a.476 kJ/mol
b.121 kJ/mol
c.251 kJ/mol
d.315 kJ/mol
e.212 kJ/mol

2007-05-31 06:44:08 · 1 answers · asked by Anonymous

WWW.z-phys-chem.de

2007-05-31 06:41:06 · 3 answers · asked by Anonymous

Which of the following properties is associated with the value of the λ quantum number?

a.the energy of an orbital
b.the size of an orbital
c.the orientation in space of an orbital
d.the number of electrons in an orbital
e.the shape of an orbital

2007-05-31 06:36:37 · 2 answers · asked by Anonymous

What type of orbital is designated n = 4, λ = 3, mλ = -3?

a.4p
b.4d
c.none
d.4f
e.4s

2007-05-31 06:36:20 · 1 answers · asked by Anonymous

What name in general is given to compounds in fuels which have oxygen atoms in their molecules??? Thanks x

2007-05-31 06:22:07 · 6 answers · asked by Kimbob 1

Write chemical formulas representing each of the six types of compounds listed below. For each compound, justify your answer.

a. Arrhenius acid


b. Arrhenius base


c. Brønsted-Lowry acid


d. Brønsted-Lowry base


e. Lewis acid


f. Lewis base


Thanks soo muchh!

2007-05-31 06:21:00 · 1 answers · asked by peek-a-boo 1

Which of the following sets of quantum numbers refers to a 4p orbital?

a.n = 4, λ = 2, mλ = -1
b.n = 1, λ = 1, mλ = -1
c.n = 1, λ = 2, mλ = -1
d.n = 4, λ = 1, mλ = 0
e.n = 4, λ = 3, mλ = +2

2007-05-31 06:14:41 · 4 answers · asked by Anonymous

i am trying to find the rate constant k' for my experiment and can't come up with a whole number for my initial iodide concentration. the equation is
rate = k' [I-][H2o2]

and i've already found from my graph that H2O2 is first order.

anyone done this experiment before and have a value for iodide's order or even k'?

any help or explanations are much appreciated!

2007-05-31 06:14:08 · 2 answers · asked by Anonymous

2007-05-31 06:07:43 · 4 answers · asked by v_chitra_16 1

Which of the following transitions in a hydrogen atom would emit the lowest energy photon?

a.n = 3 to n = 2
b.n = 1 to n = 2
c.n = 6 to n = 5
d.n = 2 to n = 8
e.n = 5 to n = 1

2007-05-31 06:00:08 · 3 answers · asked by Anonymous

According to experiments concerned with the photoelectric effect, which of the following will increase the kinetic energy of an electron ejected from a metal surface?

1.increasing the wavelength of the light striking the surface
2.increasing the frequency of the light striking the surface
3.increasing the number of photons of light striking the surface

a.1 only
b.3 only
c.2 only
d.2 and 3
e.1 and 2

2007-05-31 05:59:44 · 7 answers · asked by Anonymous

If the energy of 1.00 mole of photons is 441 kJ, what is the wavelength of the light?

a.451 nm
b.680 nm
c.732 nm
d.271 nm
e.891 nm

2007-05-31 05:58:22 · 4 answers · asked by Anonymous

CH3NO2 + O2 --> CO2 + H2O + N2

2007-05-31 05:58:09 · 5 answers · asked by Kimbob 1

For a hydrogen atom, calculate the wavelength of the line in the Lyman series that results from the transition n = 4 to n = 1. The Rydberg constant equals -2.18 × 10-18 J.

a.182 nm
b.121 nm
c.97.2 nm
d.30.4 nm
e.114 nm

2007-05-31 05:57:25 · 2 answers · asked by Anonymous

A microwave oven emits radiation at a wavelength of 0.500 cm. What is the frequency of this radiation?

a.2.00 s-1
b.1.50 × 106 s-1
c.6.67 × 10-7 s-1
d.1.67 × 10-11 s-1
e.6.00 × 1010 s-1?

2007-05-31 05:56:29 · 2 answers · asked by Anonymous

1) It should not be hazardous if it has contact with the body
2) It must be malleable...
3)...and be able to harden fully after molded into a shape.

It can be a liquid or solid.
Is there anything like that out there?

2007-05-31 05:54:31 · 6 answers · asked by MGK 1

2007-05-31 05:54:26 · 15 answers · asked by Anonymous

2007-05-31 05:53:40 · 1 answers · asked by berkedon 1

2007-05-31 05:36:09 · 3 answers · asked by Shay F 1

Im doing this science project and its due today?
Here is the origional Question. If you incrementaly add table salt (sodium chloride) to a solution of microorganisms (such as pond water) How many grams of salt must be added before microorganisms die.

2007-05-31 05:33:44 · 4 answers · asked by maksimred 1

I NEED TO KNOW ALL THAT COSTS A TON OF OILY ACID INDUSTRIAL MONOCARBOXILIC DERIVED FROM PALM OF OIL... BANDAGE IT IN A CHEMISTS' SHOP PLEASE
Or THE PAGE OF THE ENTITY OF THE GOVERNMENT TAKEN CHARGE OF THE AGRICULTURE I AM FROM COLOMBIA AND DO NOT FIND THIS INFORMATION OF HIS COUNTRY

2007-05-31 05:32:16 · 1 answers · asked by MACACHEZ 2

2007-05-31 05:30:50 · 1 answers · asked by Anonymous

At constant pressure, will a gas increase its volume with an increase in temperature?

2007-05-31 05:28:20 · 6 answers · asked by Peter M 1

the material constituents of living body are perfectly ordinary chemical atoms: carbon(such as in soot), hydogen and Oxygen(such as in water), nitrogen (as in atmosphere); and so on. Do these and other atoms compose a living cell? so, is a human body marely atoms, or atoms plus life?

2007-05-31 05:23:58 · 5 answers · asked by Anonymous

Determine whether the following statements about heats of reaction are true or false.

A) The heat of reaction is sometimes the change in internal energy.
B) The heat of reaction is the sum of the standard heats of formation of the products minus the sum of the standard heats of formation of the reactants.
C) You can calculate the heat of reaction from standard heats of formation.
D) The standard heat of formation of carbon (graphite) at 25 degC is zero.
E) The standard heat of formation of all elements at 1 atm and 25 degC is zero.


I think D, E, and possibly B or True but I'm not certain, on the others I have no clue.

Please help, Thank You

2007-05-31 05:20:34 · 9 answers · asked by s game 1

i cant find any websites to help me!

2007-05-31 05:20:07 · 8 answers · asked by Anonymous

a. completely

b. partially

2007-05-31 05:13:16 · 3 answers · asked by Anonymous

its volume is to be reduced to 350.0mL when the pressure falls to 986.7mbar?

2007-05-31 05:12:47 · 5 answers · asked by Anonymous