Iron Definition and 517 Threads

Thank you in advance. Homework Statement Nitrogen gas can be obtained from the reaction between sodium azide and iron oxide. 6NaN_3_{(s)}+Fe_2O_3_{(s)} \rightarrow 3Na_2O_{(s)}+2Fe_{(s)}+9N_2_{(g)} a) What is the yield of this reaction, knowing that, from 390 g of azide and 400 g of...

Homework Statement 4Fe+3O2=2Fe2O3 deltaH=-1.65 x 10^3kJ If there are 15.7 grams of iron and 7.99 grams of oxygen, how much heat will be produced? Homework Equations Since Iron is the limiting reagent do I use that to determine the heat released? The Attempt at a...

Hello everyone, My questions and link to my webpage is posted over at the original science forums. Please take a look: http://www.scienceforums.net/forum/showthread.php?t=36161 Cheers, Michael

How much pressure is needed to compress the volume of an iron block by 0.16 \%? Express your answer in {\rm{N/m}}^2. I know pressure is the same as stress, and that stress is force/csa. Could someone point me in the right direction.

Hi, My friend and I were having a discussion and had a disagreement. I'm hoping one of you intelligent people can settle it for us. There are two points I'd like to talk about. 1. Safety concerns and practicalities aside why would one choose to heat a room with a baseboard heater versus an...

I am not a student and this is not homework. I am just a thinking individual who would like to know the following: Weight is a product of mass and gravitational force. If the mass of two objects like a ball of cotton and a ball of iron is the same (1 kg) and the gravity is the same because both...

Hello:cool:o! I wanted to know that why do we use a soft iron core in an inductor?

I'm curious as to why there aren't heavier metals in the Earth's core than iron and nickel. Why those two? Anyone have any insight?

Homework Statement What is the volume of one mol of iron where iron is 55.8 g/mol and the density of iron is 7.86 x 10^3 kg/m^3 ? Homework Equations p = m/v The Attempt at a Solution I can get the numerical answer (checked back of book), but I'm not sure how my units worked...

Homework Statement Iron produces many lines in the visible spectrum when given energy. Suggest why a sample of iron sulphate only produces lines in the green section of the spectrum. Sorry if it doesn't sound very scientific, I am recalling the question from memory since I've already handed...

I just need to refresh my memory: When writing electron configurations for elements in the d block such as Iron (Fe), would you write it like this: 1s2 2s2 2p6 3s2 3p6 4s2 4d6 OR like this: 1s2 2s2 2p6 3s2 3p6 4s2 4p6 4d6

So recently I was thinking about the movie Iron Man and I know its just a movie, but any ideas on how his suit flies? I know this sounds a little far fetched but I was just curious.

Homework Statement How much heat is needed to melt 16.7 kg of iron that is initially at 21.3°C? Homework Equations Q=m*c*ΔT + mL The Attempt at a Solution here: m=16.7kg, c=0.45kJ/kg*K, and ΔT=1538-21.3=1516.7 Thus, Q1=1.14e7 J Then, I need to calculate latent heat needed, which...

Any one know? I think becayse when you rub the magnet over the metal it causes something to align up, aligning up the poles? Ah i duno

Homework Statement Given an iron bar, of round cross-section, fixed by its extremities (bar measures 152 mm in length and 4.8 mm in diameter), a weight of 88.5 kgs is hung from its middle, bending it at least 90 degrees. How much weight/force would be needed to bend another bar of...

Hello All, I have a sample which has been covered in a layer of iron and gold for protection. So, in order to work with the sample, we need to etch away the metallic layers. I hear there is a specific chemical recipe for chemically etching away iron and gold from a sample. If anyone can link...

Homework Statement A rectangle bar of iron is 2cm by 2cm in cross section. Calculate its resistance if the resistivity of iron is 11 \times 10^{-8}\Omega{m}. Homework Equations R = \frac{Pl}{A} The Attempt at a Solution R = \frac{Pl}{A} A = 2 \times 2 \times 10^-4 = 4 \times...

[b]1. This is a question about a lab. The absorbing solution used in the lab had a mole ratio of phen to Fe of 52.8:1 However, the complex [Fe(phen)3]2+ has a mole ratio of 3:1 for phen:Fe [Fe(phen)3]2+ is a coloured complex and we were determing iron concentration in a tablet. I don't...

I want to make a standard iron solution 1 g/L by using iron powder and i can't dissolve it by any way. Is anyone have an idea? thanks in advance.

http://www2.uah.es/jmc/ai14.pdf On page 2 of the above pdf there is an example in a box with title 'Acceleration' which states that there is a difference between a man pulling on a rope with 600N force and an iron weight of 60Kg (g = 10) tied to the rope. The difference being that once the...

I might be posting this in the wrong area. If so, sorry about that. :<) From what little I understand of the subject oral vitamin C helps the body absorb iron. Should this be the case, could topical vitamin C in combination with penetration enhancers also enhance dermal absorption of iron oxide?

[SOLVED] Thermo Energy. Iron + Ice Homework Statement A 50-g chunk of 80 degree C iron is dropped into a cavity in a very large block of ice at 0 degrees C. How many grams of ice will melt? (The specific heat capacity of iron is .11 cal/g*C)Homework Equations Q = cmdeltaT Quantity of heat =...

determine the % of iron II and iron III in a mixture containing both, where i am given 200cm3 of a solution containing 1.3g of iron ions(Fe 2+ Fe 3+) using potassium magnanete. I wrote down the equation already, and method, but i don't know how to work out the % from it :/ Can you please help...

1. if one had a bar of iron that was magnetized and tossed it around on the asphalt, why does it get demagnetized. 2. how can i re magnetize it? 3. I don't get the question

Ok, this is from the first's: :wink: I have an iron stick of 3 inch long, If I insert this stick into a baz jar then immediately insert it into an acidic (H2SO4 liq) will that stick be worn out ? How do I know it is worn ? Thanks Joan John

Calculate the lattice constant of a body-centered cubic iron crystal using the molar mass of iron, the density of iron and the Avogadro number.

as i know, ferrous iron (Fe2+) will convert to ferric iron (Fe3+) if we mix water contain iron (such as groundwater) with chlorine. then the water should go through filtration process to filter the extractable iron (Fe3+). that how we can reduce the content of iron in water. my question...

when a compass is installed on an iron ship, why must there be small correcting magnets installed near the compass? Is it because the iron is itself magnetized somehow?

hi everyone this is a related rates question no one in the class could solve it. I could not find how to find the equation that relate all the things in the question.the question is: A spherical iron ball 8 in. in diameter is coated with a layer of ice of uniform thickness. If the ice melts...

[SOLVED] Iron ions I am curious about the properties of iron ions fe2+ and fe3+. As they are accelerated in a mass spectrometer, which would travel faster and have the largest radius. I understand that they have lost electrons and have a marginal loss in mass, as well I understand that a...

Ok, so I decided to make some rust. I had some steel wool lying around and decided to try the water/bleach/vinegar solution. I put 2 pieces of steel wool into a glass mason jar in the solution that covered the steel wool by about an inch. Then I put a plastic container over it to keep the...

Does anyone know a online store I can purchase a solder iron from? i need one at my house and my schools not letting me take one home. How much are they anyway?

Homework Statement You must devise a volumetric procedure to determine the percentage or Iron(ii) and Iron (iii) in a mixture containing both. You are provided with 200cm^{}3 of a solution containing between 1.1g and 1.3g of iron ions as a mixture of Fe^{}2+ and Fe^{}3+(aq). You may assume...

Consider two iron spheres, each of diameter 100mm, which are just touching. At what distance r from the center of the Earth will the force of mutual attraction between the contacting spheres be equal to the force exerted by the Earth on one of the spheres? Here's my work... d = distance...

Can iron oxide be reduced to metallic iron with methane in place of hydrogen?

heat turn iron to gold if heated?? Can Iron(Fe) be changed to gold(Au) if heated to a high enough temperature? My attempt Question 2 No, iron cannot be changed to gold by heating it to a high enough the temperature. Increasing the metal's temperature has no effect on the state.

If I were to go to a random hardware store and look at some iron, how would I be able to tell how soft or hard the iron was? Also, is there any other cheap magnetic material that would work better then iron to make an electromagnet with? Thank you for your time.

might be a naive question, but concerning the blast furnace: they blow pure o2 through the raw iron to oxidise impurities like carbon etc, but that would mean that exactly the right amount of o2 would have to be blown through before the iron also started reacting, which in turn means the...

I tried 1.000.000 on google and I didn't find nothing. So please help me. Thank you.

I have weighed a cast iron brake disc and got an average reading of roughly 4kg, id like to know how a stainless steel disc would compare with this weight (just roughly) and also, if a ceramic plate was added to the iron disc...any help appreciated...thanks! H

I would like to know what is the function of soft iron core? Is there a difference in function when inserting soft iron core in inductor , motor , generator ? Thank you

Hello, I have seen some very good analysis on this website. Therefore, I would like to get some comments on my idea. I was thinking how practical is to develop a sheild by rapid and powerful shooting of numerous Iron blades (with diameter and length slightly bigger than a bullet) over a...

Homework Statement For my science assignment coming up i need to know more about rusting on iron nails, like how and why it occurs, what conditions help the process, what conditions don't and any other information would be very helpful. I will be setting up my own experiment so help solve...

Greetings, i am assigned to do a project which requires us to do experiment on ways to separate the rusted iron into 2 elements which are Iron and Oxygen. Anyone have any idea about that?:bugeye:

If i take a piece of iron, and put it into a 0.1 mol/L solution of sodium dichromate, will rusting occur? If the solution was 1 mol/L, i could use my table of standard reduction potentials, and find the emf of the reaction, but 0.1 mol/L isn't standard conditions. How should i go about...

As far as I know Iron is used in many enzymes as the metal complex. Beyond this are there any biological uses for iron? All uses appreciated, ty.

Hi. In chemistry, we are currently studying electrochemical cells. We are doing corrosion at the moment. Corrosion of iron, to be specific. If i have a piece of iron exposed to the air, it will form a thin layer of iron oxide, right? However, this oxide will have fine cracks and be quite...

While I know iron isn't the most common element in the universe, is it possible that there is a Jupiter + size planet made primarly of iron? Also, when it comes to black holes - would a massive iron planet form a black hole due to it's immense mass? What would be the minimum mass to form a black...

Can someone please verify my results? and help me in one-2 questions? I did this lab in school today and had some problems filling in the table that followed. In the lab, we took some Copper Chloride and mixed it dionized water. Then we added in an iron nail and waited for about 20 mins. After...

1.If the tube of a faulty barometer is pushed down into the mercury trough, the barometric height will further decrease. Why does this happen? 2. If I am provided with two similar bars, one is a magnet and the other is soft iron. How can I distinguish between them without using any other thing?