Chemistry - November 2006

We did a lab where we burned magnesium (to create magnesium oxide), then added water and heated again in a crucible with the cover ajar to release any Magnesium Nitride created.

The question on the lab report is this: if water had not been added to your initial product, a mixture of MgO and Magnesium Nitride (Mg3N2?) what error in the percentage magnesium determined would have resulted?

I will greatly appreciate any help on this! :)

2006-11-21 20:28:27 · 1 answers · asked by tiggywinkle 3

2006-11-21 19:33:30 · 5 answers · asked by Anonymous

Can someone please help me with naming alcohols that have more than one hydroxyl group? what is it called when there are two hydroxyl groups?

I have a diagram with what could be cyclohexanol but there are two hydroxyl groups, what is this called?

I need it for my chemistry exam tomorrow

2006-11-21 19:14:40 · 3 answers · asked by dundledee 2

2006-11-21 18:21:27 · 1 answers · asked by RED MIST! 5

2006-11-21 17:09:43 · 1 answers · asked by avalentin911 2

2006-11-21 16:33:33 · 4 answers · asked by Harvey 1

2006-11-21 16:26:22 · 5 answers · asked by ysu guy 1

2006-11-21 16:17:25 · 7 answers · asked by Mim 1

2006-11-21 15:52:42 · 12 answers · asked by Anonymous

the principle states that "no two electrons in an atom can have the same four quantum numbers." what does 4 quantum numbers mean? i dont really understand what it is tryign to say

2006-11-21 15:51:02 · 4 answers · asked by avalentin911 2

how is it done to an alkane or alkene?

2006-11-21 15:45:21 · 3 answers · asked by dundledee 2

2006-11-21 15:33:06 · 5 answers · asked by dundledee 2

2006-11-21 15:26:11 · 2 answers · asked by Anonymous

I need to know if these individual questions are true or false? Thanks for all your help and for this I am truly thankful,Clint

True or False
Pressure is caused by the collision of the atoms which make up a gas with the wall of a container

True or False
Atoms move about more rapidly in a solid than a gas

True or False
The speading of a gas to fill a container is called diffusion

True or False
When a gas is heated, its atoms have more kinetic energy

2006-11-21 15:12:45 · 6 answers · asked by cetinnovations 1

I am refering to Bohr's theroem of hydrogen. He used a formula involving the "Rydberg constant". My question is why are energy levels assigned negative values is it because the negative sign says that the energy is giving off to the surroundings? or is it because the negative sign signifying that the energy of the electron in the atom is lower than the energy of a free electron? Thanks for helping

2006-11-21 15:07:44 · 3 answers · asked by avalentin911 2

8%, 40%, 80%, 160%

2006-11-21 15:01:52 · 7 answers · asked by Anonymous

alkane, alkene, alkyne, aromtic

2006-11-21 14:59:30 · 4 answers · asked by Anonymous

in WW1, based upon this chemistry, carbin tetrachloride is no loner used in... fire extinguishers, dry leanin, chemial reactions, toilet bowl cleaners

2006-11-21 14:35:02 · 3 answers · asked by Anonymous

2006-11-21 14:34:45 · 3 answers · asked by dkplamann 1

form four bonds, bond to oxygen, bond to nitrogen, bond to carbon

2006-11-21 14:29:39 · 5 answers · asked by Anonymous

a hydrated crystal is one inwhich ( )?

(1) , water molecules are part of the crystal
(2),water molecules have being remove
(3),hydrogen molecules are part of the crystal
(4),hydrogen molecules have being remove

which one is correct ? explain ?

2006-11-21 14:25:19 · 3 answers · asked by henry f 2

alkenes, alkanes, aomatic compounds, hydrocarbons

2006-11-21 14:21:50 · 11 answers · asked by Anonymous

benzene and ethyne both have the same empirical formula of CH .if the mass of a mole of one of the compounds is 26 g, what is a possible mass of a mole other compound ?

2006-11-21 14:19:57 · 3 answers · asked by henry f 2

1) magnesium nitride

2) calcium oxide

3) silver fluoride

4) beryllium chloride

5) potassium iodide

***thank you in advance =)

2006-11-21 14:16:01 · 7 answers · asked by Anonymous

2006-11-21 14:10:48 · 7 answers · asked by Anonymous

2006-11-21 14:08:13 · 1 answers · asked by Anonymous

1) sodium chromate

2) barium nitrate

3) ammonium sulfate

4) aluminum hydroxide

5) calcium phosphate



(*PLEASE NOT THAT THE #'S ARE SUPPOSED TO BE IN SMAL FORM)

2006-11-21 13:54:54 · 2 answers · asked by Anonymous

1) NH(4)Cl

2) HClO(2)

3) Ca(BrO(3))2

4) BeSO(4)

5) (NH(4)) (3)N

6) RbI

(*PLEASE NOT THAT THE #'S ARE SUPPOSED TO BE IN SMALL FORM)

2006-11-21 13:49:47 · 3 answers · asked by Anonymous

I need help with these questions. Answer as many as you can.

1) Gases do not form liquids, unless the temperature is lowered, because of the
a) extremely small size of the gas particles
b)relatively slow motion of the gas particles
c)weak attractive forces between particles
d)presence of repulsion forces between particles.

2)One way for a balloon to rise in air is to
a)heat the air inside the balloon
b)increase the pressure of the air inside the balloon
c)choose a gas with a weight less than the air it displaces
d)choose a gas with a density greater that the air it displaces

3) Which of the following gases would you expect to have the greates lifting power?
a)hydrogen
b)oxygen
c)astatine
d)hydrogen fluoride

2006-11-21 13:39:47 · 3 answers · asked by Anonymous

how do you find it?
I need to know the Mass in grams of CO2
can you also show me the steps
THANKS

2006-11-21 13:28:36 · 5 answers · asked by Smile.. it makes a difference! 1