Chemistry - October 2007

Chemistry.....Help!!!?
I can't figure this dang thing out:

Assume the reaction of 51.47 g of Ge in the following reaction to determine the other quantities.

3Ge + 2N2 -> 1Ge3N4
moles of Ge reacting =
moles of N2 required =
moles of Ge3N4 formed =
mass of Ge3N4 formed =

I have ge and n2 as .71 and .47, which are correct, but I can't seem to figure out that last two. Please help!!!

2007-10-08 15:57:52 · 2 answers · asked by Anonymous

no web site please

2007-10-08 15:03:54 · 1 answers · asked by Becker14 1

2007-10-08 15:01:10 · 1 answers · asked by shauna s 1

2007-10-08 14:59:39 · 1 answers · asked by Catharine W. Dulaney 2

A student completes two trials of an experiment and calculates the mass percent magnesium in the product as 62.39%. Assuming that the product is a mixture of MgO and Mg3N2, calculate the mass percent of MgO in the synthesized product. (Hint: calculate the theoretical percent magnesium for comparison in both the MgO and Mg3N2.)

2007-10-08 14:56:20 · 1 answers · asked by Brookey 2

I thought I knew how to do it, but I can't get the right answer...

Magnesium burns in air to produce magnesium oxide, MgO, and magnesium nitride, Mg3N2. Magnesium nitride reacts with water to give ammonia.


Mg3N2(s) + 6H2O(l) ==> 3Mg(OH)2(s) + 2NH3(g)


What volume (in L) of ammonia gas at 24oC and 743 mmHg will be produced from 4.37 g of magnesium nitride?

2007-10-08 14:49:15 · 1 answers · asked by Anonymous

A sheet of gold weighing 10.0g and at a temperature of 18.0 degrees celcius is placed flat on a sheet of iron weighing 20.0g and at a temperature of 55.6 degrees celcius. What is the final temperature of the combined metals? Assume that no heat is lost to the surroundings.

Could you show step by step on how to do it. Please and thank you.

2007-10-08 14:38:23 · 1 answers · asked by bryon_barker 2

I can't figure this dang thing out:

Assume the reaction of 51.47 g of Ge in the following reaction to determine the other quantities.

3Ge + 2N2 -> 1Ge3N4
moles of Ge reacting =
moles of N2 required =
moles of Ge3N4 formed =
mass of Ge3N4 formed =

I have ge and n2 as .71 and .47, which are correct, but I can't seem to figure out that last two. Please help!!!

2007-10-08 14:35:32 · 1 answers · asked by Anonymous

They are:
a. Aluminum reacts with KOH and water forming potassium ions, [Al(OH)4]- and hydrogen gas.

b. Hydrogen ions from H2SO4 react with the tetrahydroxaluminate ions [Al(OH)4] to precipitate aluminum hydroxide.

c. Aluminum hydroxide reacts with aditional hydrogen ions and water to form [Al(H20)6]^+3

d. Alum forms from the potassium ions, hydrated aluminum ions, sulfate ions and water.

2007-10-08 14:26:37 · 1 answers · asked by Anonymous

I'm confused- I heard the Bohr model works only for hydrogen? Can someone explain what his model was/what it applies to?

2007-10-08 14:16:30 · 1 answers · asked by Anonymous

i can't seem to find one that has the atomic # AND the atomic mass
can anyone give me a link to where it's at
the one with the best periodic table gets best answer and 10 points ! :)
thanks

2007-10-08 14:16:04 · 1 answers · asked by ♥ mimi ♥ 7

2007-10-08 13:56:24 · 2 answers · asked by shauna s 1

Tagamet 0.2 g needs to be given at the label recommends 200 mg / 2ml

What would the dosage be?

2007-10-08 13:50:30 · 2 answers · asked by whisper2ya 2

When 37.5 L ammonia and 42.0 L oxygen gas at STP burn, nitrogen monoxide and water are produced. After the products return to STP, how many grams of nitrogen monoxide are present?

2007-10-08 13:46:48 · 1 answers · asked by ws 3

A mixture of gases contains 0.34 mole CH4, 0.44 mole C2H6, and 0.28 mole C3H8. The total pressure is 1.50 atm. Calculate the partial pressures of the gases.
PCH4

PC2H6

PC3H8

2007-10-08 13:46:10 · 1 answers · asked by ws 3

2007-10-08 13:24:01 · 2 answers · asked by netsc 1

2007-10-08 13:10:31 · 9 answers · asked by ridgerat01 1

Rutherford's alpha scattering experiment showed that most alpha particles directed toward a thin metallic foil passed through with only slight deviations. From this evidence we can coclude that
1. mass of the atom is concetrated in a small area
2. alpha particle are uncharge
3. foil too thin
4. alpha particle is type of light should not be deflect

2007-10-08 13:09:52 · 2 answers · asked by Anonymous

What's the difference of polarity between water (H20) and isopropyl alcohol (C3H8O)?

2007-10-08 13:08:57 · 2 answers · asked by Anonymous

sucrose------------> glucose + fructose ??
sucrase

what are the reactants and the products? what is the type of chemical bonding and reaction?
and what is the function of the enzyme?

2007-10-08 13:05:34 · 2 answers · asked by Mario F 1

2007-10-08 12:45:57 · 3 answers · asked by Anonymous

Calculate the number of moles of oxygen gas produced from the complete catalyzed decomposition of 6.20ml sample of a 3.5% solution of H2O2. The density of the 3.5% solution of H2O2 is 1.01 g/ml.

i cant figure out how to do this

2007-10-08 12:39:42 · 1 answers · asked by mzglobicki2 1

2007-10-08 12:22:05 · 1 answers · asked by skwarren2009 2

A reaction of 0.028g of magnesium with excess hydrochloric acid generated 31.0 mL of a gas. The gas was collected by water displacement in a 22 degree celsius water bath. The barometric pressure in the lab was 746 mm Hg. Using Dalton's Law and the vapor pressure of water at 22 degrees celsius, calculate the partial pressure of hydrogen gas. Use the combined gas law to calculate the "corrected" volume of hydrogen at STP.

2007-10-08 12:20:00 · 1 answers · asked by Anonymous

The active agent in many hair bleaches is hydrogen peroxide. The amount of hydrogen peroxide in 17.0 g of hair bleach was determined by titration with a standard potassium permanganate solution.
2 MnO4-(aq) + 5 H2O2(aq) + 6 H+(aq) 5 O2(g) + 2 Mn2+(aq) + 8 H2O(l)

what is the mass % of H2O2 in this equation the givens r .402g of H2O2, 4.73X10^-3 moles of MnO4 and 1.18X10^-2 moles of H2O2

2007-10-08 12:11:46 · 1 answers · asked by cj 2

1. Write a balanced net ionic equation showing aluminum hydroxide dissolving in a solution containing excess hydroxide

2. Write a balanced net ionic equation showing aluminum hydroxide dissolving in an acid soluation.

2007-10-08 11:47:09 · 1 answers · asked by Anonymous

24
12Mg

that Mg is supost to be between the 2 numbers not on the bottom or top specifically.

2007-10-08 10:53:33 · 2 answers · asked by Anonymous

What will the temperature be of 165 mL H2O at 22 C mixed with 85 mL H2O at 82 C? How do you get this?

2007-10-08 10:51:22 · 1 answers · asked by Anonymous

can you please convert 373 kelvin to celsius please!

2007-10-08 10:49:02 · 1 answers · asked by ? 3

show work

2007-10-08 10:48:56 · 2 answers · asked by Katrina r 1