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July 29, 2014

Search: 12. How many grams of CO are needed to react with an excess of Fe2O3 to produce 209.7 g Fe?

Number of results: 13,133

chemistry
What mass of sodium oxide could be made from 1,15 grams of sodium
May 8, 2012 by Dilan

Science
How many grams of CaCl2 are required to prepare 2.00 liters of 7.00 M CaCl2?
April 2, 2013 by Destiny

Chemistry
How many grams of magnesium nitride are formed from 45.1 moles of magnesium?
April 16, 2013 by Sophie

Chemistry
How do I calculate this? How many grams of CaCl2 is in 500 mL 0.1 M solution of CaCl2
June 25, 2013 by Kate

chemistry
How many grams (of mass m) of glucose are in 355mL of a 5.50% (m/v) glucose solution?
November 4, 2013 by chelsea

chemstry
How many grams of CaCl2 would be dissolved in 1.4 L of a 0.11 M solution of CaCl2?
March 11, 2014 by yanely

chemestry
How many grams of CaCl2 would be dissolved in 1.4 L of a 0.11 M solution of CaCl2?
March 11, 2014 by yanely

Information Technology
what are the benefits from using thinking skills you succeed in your educational and personal life i guess!!! I would love to hear and critique what you think of for this answer ;) Matt What happens if you DON'T use thinking skills? That is, if all you do is react to whatever ...
March 19, 2007 by Cassy

chemistry
PLEASE NOTE: Titration requires several steps in order to obtain exact results. The procedures described in this lab assume that you have already done the TITRATION TUTORIAL and are familiar with the technique. 1. Prepare the NaOH solution by dissolving approximately 4g of ...
April 15, 2011 by Zach

AP CHEM
help please. i don't even know where to start An empty glass container has a mass of 658.572 g. It has a mass of 659.452 g after it has been filled with nitrogen gas at a pressure of 790. torr and a temperature of 15?C. When the container is evacuated and refilled with a ...
January 23, 2008 by Nikki

Chemistry
So we have a question for chem. homework and i really don't understand. can you please explain it..... Question:There is a change in the type of oxides formed with the period three elements. Indicate the type of compounds formed (ionic, amphoteric, covalent) when the period ...
May 17, 2008 by Karina

stoichiometry
When Ba(NO3)2 and K2CrO4 (sorry, i don't know how to do subscripts, but all the numbers should be subscripts!) react in aqueous solution, the yellow solid BaCrO4 is formed. Calculate the mass of BaCrO4 that forms when 3.50 x 10^(-3) mol of solid Ba(NO3)2 is dissolved in 265 mL...
June 5, 2008 by em

Big Review (2 posts in 1)
How many grams of propane are in a 35L container at 40 deg Celsius and 900 torr? 40 deg C = 40 + 273K = 313 K 900 torr/768 torr = 1.2 atm (when do I convert to atm? I did it here simply to ease calculations) Propane: C3H8 --> M.W. = 44.1 g PV=nRT where R= .0821 Sol: n=1.2 ...
June 14, 2006 by Kizner (chem)

Organic Chemistry
Please Helppp!!!!!! 1)In the test with sodium iodide in acetone and silver nitrate in ethanol, why should 2-bromobutane react faster than 2-chlorobutane? 2) When treated with sodium iodide in acetone, benzyl chloride reacts much faster than 1-chlorobutane, even though both ...
February 18, 2010 by Ashley

economics PLEASE HELP
According to the permanent hypothesis, households will tend to react to a temporary tax cut by: A. assuming the new tax level will be permanent. B. saving most of the additional disposable income. C. increasing consumption sharply in response to the higher disposable income. D...
December 20, 2010 by tony

molarity
An aspirin tablet weighing 0.475 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of the solution was ...
February 16, 2007 by christine

chemistry
how many liters of hydrogen gas measured at 1.05 atm and negative 25 degrees will be produced when 5.00 grams of magnesium metal is dropped into excess hydrochloric acid?
May 25, 2010 by sss

chemistry
what mass in grams of a molecular substance (mole weight=50.0g/mol) must be added to 500g of water to produce a solution that boils at 101.56(degrees)C?
June 26, 2010 by jimbo

Chemistry
Please reply as soon as possible, I really need the answer urgently. How many grams of NaOH are required to completely neutralize 100ml of 1M solution of H2SO4?
September 28, 2010 by Lost In Studies

chemistry
Which one of the gollowing represents the theoretical yield, in grams, of precipitate for the double displacement reaction if 25.0 mL of 1.75 M aqueous calcium nitrate is added to 15.0 mL of 1.50 M sodium phosphate?
October 15, 2010 by Tammy

Chemistry
What is the percent aluminum in a sample weighing 1.85 grams. If 35 mL of wet hydrogen gas was produced @ 24 degrees Celsius under a total pressure of 752 torr?
October 25, 2010 by Katy

Geology
How many calories would it take to transform 2 grams of ice at -12C to liquid water at 85C? How do u find the answere whats the math...and how do u use the chart?
November 11, 2010 by Bernadet

chemistry
at sea level the average lung capacity for humans is about 4.o liters. at 37 degrees celcius (body temperature) how many grams of oxygen could your lungs hold?
July 11, 2011 by lia

Chemistry
If 16.01 grams of sulfuric acid are reacted with a large amount of aluminum metal, what volume of hydrogen gas would be produced at STP? What is the balanced equation?
July 13, 2011 by Bradley

chemistry
What mass, in grams, of oxygen gas (O2) is contained in a 10.5 liter tank at 27.3 degrees Celsius and 1.83 atmospheres? Show all of the work used to solve this problem.
December 19, 2011 by sarena

Chemistry
Calculate the number of mL of hydrogen gas at 27 degrees Celsius and 640 Torr produced by the reaction of 0.520 grams of magnesium with excess hydrochloric acid.
February 5, 2012 by Noah

AP CHEMISTRY
Suppose that a 15-mL sample of a solution is to be tested for I- ion by addition of 1 drop (0.20 mL) of 0.30 M Pb(NO3)2. What is the minimum number of grams of I- that must be present for PbI2(s) to form? (Ksp = 7.9 10-9)
March 12, 2012 by HELP PLEASE to DrBob222

Chemistry
What volume of hydrogen gas measured at 27celcius and 723 torr may be prepared by the reaction of 8.88 grams of gallium with an excess of hydrochloric acid? Ga+ HCl ==> GaCl3 + H2
March 25, 2012 by Anonymous

chemisrty
what volume of hydrogen gas at STP can be produced by reacting 15.0 grams of uluminum with sulfuric acid? the equation is: 2Al+ 3H2SO4---> Al2(SO4)3+ 3H2
March 29, 2012 by kim

Chemistry
Calculate how many grams of the product(s) would be produced by complete reaction of 0.125 mole of the first reactant. CaCO3 + 2HCl --> CaCl2 + CO2 + H2O
April 22, 2012 by Lindsey

Chemistry II
Determine the grams of solute required to prepare 0.5 m solution HC2H3O containing 750 g of water. Make sure to show your work. **(Thanks for helping by the way.)**
January 22, 2014 by Chrystal

Chemistry
Determine the amount (in grams) of boron that when substitutionally incorporated into 1 kg of silicon will establish a charge carrier density of 3.091◊1017 carriers/cm3.
November 19, 2012 by selly

Chemistry 2
How many grams of nickel metal are plated out when a constant current of 15.0 A is passed through aqueous NICl2 for 60.0 minutes. Show all work. Please help!
December 4, 2012 by Ashley

Chemistry
Assume that 7.2 L of I2 are produced at STP according to the following balanced equation: 2KI+Cl - 2KCl+ I2 How many grams of KI (MOLAR MASS=166.002G/MOL) reacted
January 15, 2013 by Valerie

Chemistry
Assume that 7.2 L of I2 are produced at STP according to the following balanced equation: 2KI+Cl - 2KCl+ I2 How many grams of KI (MOLAR MASS=166.002G/MOL) reacted
January 15, 2013 by Valerie

Chemistry
Assume that 7.2 L of I2 are produced at STP according to the following balanced equation: 2KI+Cl - 2KCl+ I2 How many grams of KI (MOLAR MASS=166.002G/MOL) reacted
January 15, 2013 by Valerie

chemistry
Assume that 7.2 L of I2 are produced at STP according to the following balanced equation: 2KI+Cl - 2KCl+ I2 How many grams of KI (MOLAR MASS=166.002G/MOL) reacted
January 15, 2013 by Valerie i need it ASAP

Chemistry
Help!!!!!!!!!!!! Fe + CuSO4 --> Cu + FeSO4 2.05g 7.00g 2.46g 151.8g Which reactant was limiting and how does this chemical equation support this? The numbers beneath the names are the masses in grams.
February 18, 2013 by Megan

CHEMISTRY HELP PLEASE!!
0.350L of 0.160 M NH3 is added 0.140 L of 0.100 M MgCl2 . How many grams of (NH4)2SO4 should be present to prevent precipitation of Mg(OH)2 (aq) ? The Ksp of Mg(OH)2 is 1.8 x 10Ė11.
March 2, 2013 by Marissa

Chemistry
How many grams ammonium chloride and how many milliliters 3.0 M sodium hydroxide should be added to 200 ml of water and diluted to 500 ml to prepare a buffer of 9.50 with a salt concentration of 0.1 M? Ka=9.24
March 18, 2013 by ---

chemistry
I need help solving this: The grams of protein in 1 cup of soup that has 110 Cal with 7 g of fat and 9 g of carbohydrate. Express your answer using one significant figure. Thanks -MC
February 1, 2014 by mysterychicken

Chemistry (Analytical)
Solve for the number of grams of Ca2+ ion in a solution prepared by adding 1.00 gram of calcium oxalate (Ksp=1.3x10^-8)powder to 100 mL at pH 9.
February 8, 2014 by Nathan Berry

AP Chemistry
We observe that 5 grams of a gaseous com- pound occupies 2083 mL at 50 degrees C and 574 torr. What is the molecular weight of the compound? Answer in units of g/mol
February 16, 2014 by Gabriella

College Chemistry
Please help me. I have worked on this for 2 days. I don't understand the ratio of this equation.4Na+O2 to 2Na2O. for question: How many grams of Na2O are produced when 81.ograms of Na reacts?
March 7, 2014 by Linda

A.P. Chemistry
Three volatile compounds X,Y, and Z each contain elements Q. The precent by weight of element Q in each compound was determined. Some of the data obtained are given below Percent by weight Molecular Compound of Element Q Weight X 64.8% ? Y 73.0% 104. Z 59.3% 64.0 (a) the vapor...
October 2, 2011 by Lucy

chemistry
Explain why a buffer made of equal concentrations of HF and F- does not change in pH when a small amount of HCl (a strong acid) is added to the solution. Does the HCl dissociate into ions when it is added to the solution? What do the hydrogen ions react with? Why donít these ...
April 23, 2012 by Anonymous

chemistry
Explain why a buffer made of equal concentrations of HF and F- does not change in pH when a small amount of HCl (a strong acid) is added to the solution. Does the HCl dissociate into ions when it is added to the solution? What do the hydrogen ions react with? Why donít these ...
May 4, 2012 by Anonymous

biology
Why all enzyme work well in their own optimum temperature and optimum pH ? i need more explanation about why different enzyme have different optimum temperature and different optimum pH to react. i hope to get a long explanation for my essay that contain 5 marks.
July 31, 2013 by kate

computers
Can please help me, i'm stuck on thios question:- Q) Select the two true statements from the following list. A)In the OSI model, PDUs at layer 2 are called frames and PDUs at layer 3 are called packets. B)In an IPv4 packet header the Time-to-Live field is 8 bits. This means ...
February 10, 2011 by Sue

Chemistry
Need for two balanced chemical equations? I am in need of these two equations which I however do not know how they react. If anyone could help, it is greatly appreciated :) "Formation of products by heating a solid mixture of calcium propanoate and soda lime" "Formation of a ...
January 29, 2013 by Matt

Pharmacy Technician
A physician prescribed 5mg/kg q day of a drug for a patient that weighs 132 pounds. How many 100mg tablets will be needed for a 2-week prescription?
November 2, 2008 by David

Algebra
I have a math CRCT test today and I needed some help on a last minute review problem. Can someone please explain how to solve this? 1. 12x-3+6x-2=31 -MC
April 22, 2009 by mysterychicken

College physcial science
A force of 200 N is needed to push a tabble across a level classroom floor for a distance of 3 m. How much work was done on the table?
April 25, 2009 by Tiki

maths
find the amount of sheet metal needed to form a conical funnel of base radius 30 cm and vertical height 50 cm, allowing for a 0.5 cm overlap at the join?
October 18, 2009 by Chirayu

ELL
How do the varities of standards available to teachers provide a focus on high expectations and the motivation needed to taior instruction to meet the needs of the learner?
November 24, 2009 by Sam Jones

Algebra
|2 0 4| |3 1 5| |-1 1 -2| I needed the inverse of the matrix above and is the one below correct? If so how do I put the problem down to make it easier to solve. This took me forever. |-7/2 2 -2| |1/2 0 1| |2 -1 1|
December 17, 2009 by mike

Math
I cannot figure this out I keep getting the order pair(1.24,-3.44), but it does not work when I check. Can you help me? 5x+5y=-11 7x-3y=19 The other oneI needed to solve is this Question: 4y+3y<-35 I got -5>-35...is that right?
December 20, 2009 by shelley

ESL
How do the varieties of standards available to teachers provide a focus on high expectations and the motivation needed to tailor instruction to meet the needs of the learner?
March 28, 2010 by JEAN

Math
Find the total amount in the compound intrest account. $4000 is compounded annually at a rate of 11% for 3 years. (Round the nearest hundredths as needed)
April 17, 2010 by christopher

Math
Find total amount in the compound intrest account. $2000 is compounded quarterly at a rate of 8% for 6 years. (Round to nearest Hundereths as needed)
April 17, 2010 by christopher

Chemistry
The equation of nitrogen produced in a deployed air bag is: 2NaN3 + 42.7KJ--->2Na + 3N2. What amount of heat is needed to prepare 0.325kg of N2?
April 29, 2010 by amanda

History
What commercial arrangements did American shippers and traders want after the Revolutionary war had ended? Why did they feel this was needed, and how successful were they in accomplishing their aims?
August 30, 2010 by Lucy

organic chemistry
assuming the reaction goes to completion, calculate the volume of 6M KOH needed to completely neutralize all of the hydrogen bromide formed.
September 29, 2010 by Scisi

Chemistry
Balance? Cr2O7^2- + C2H4O yields C2H4O2 + Cr^3+ (When I say ^ a number followed by a plus or minus that's the charge) Half-reaction method needed.
October 11, 2010 by Alex

Economics and development studies
Define food aid critically analyse it relevance to the developing prospects of the deloping countries. Its an essay reference needed
November 2, 2010 by Gibbons

Chemistry: Stoichiometry
calculate the number of oxygen needed to oxidize 12.5grams of glucose (C6H12O6) into carbon dioxide and water. (Combustion reaction)
April 14, 2011 by Opo

Chemistry: Stoichiometry
calculate the number of oxygen needed to oxidize 12.5grams of glucose (C6H12O6) into carbon dioxide and water. (Combustion reaction)
April 14, 2011 by Opo

MATH gr10
were having an exam soon, can you list all the formulas needed..pls? i might've missed some, i just want to make shure.
June 14, 2011 by jakil

physics
If the coefficient of kinetic friction is 0.25 , how much horizontal force is needed to pull each of the following masses along a rough desk at a constant speed? A) 25 kg
April 5, 2012 by Melissa

Science
Explain the relationship between force needed, gravity, and inertia that scientists have to think about when trying to launch something in space.
April 18, 2012 by Anonymous

chemistry
joules needed to melt a 525 g ice cube at 0 degree C and to warm the liquid to 15 degrees C (two steps please show work)
September 16, 2012 by rachel

physical science chemistry
calculate the mass of sodium nitrate needed to make 550 ml of solution of concentration 0;2 mol.dmc to the power of minus 3
April 8, 2013 by Thuba

physics
In order to clearly read a book 16 cm away, a farsighted girl needs an image to be 36 cm from her eyes. What focal length is needed for the lens in her eyeglasses?
May 14, 2013 by A

physics
The amount of energy needed to power a 0.10-kW bulb for one minute would be just sufficient to lift a 1.0-kg object through a vertical distance of
August 18, 2013 by angelica

math
Assume each kid in the after school program will get 1/2 cup of lemoade. For each mix, how many batches are needed to make enough lemonade for 120 kids?
October 15, 2013 by Shanna

CHEMISTRY
What volume of 0.400 M Hg(NO3)2 is needed to precipitate all the I- ions from 250.0 mL of 0.300 M FeI3 There will be a follow-up questions so pay attention to my post!
October 22, 2013 by Anonymous

Civics
Why was the 14th amendment passed/needed? My answer- To guarantee all former slaves and their children were legally citizens of the USA under the Constitution.
November 10, 2013 by Unknown

Analytical Chemistry
How much ml of 0.200 m of KSCN will be needed after addition of 30.0 ml 0.1100 of AgNO3 to 0.3658 g KI dissolved in 100 ml water?(Ksp= 8.3*10^(-17)for AgI
June 1, 2014 by AYŞE

Chemistry
for the reaction 2Na(s) + Cl2(g) -> 2NaCl(s), how many grams of NaCl could be produced from 103g of Na and 13L of Cl2 (at STP)
January 31, 2008 by Sal

Chemistry
For the reaction 2Zn plus O2>> 2ZnO, how many grams of zinc oxide can be produced from 100.g each of zinc and oxygen?
March 18, 2008 by Whittney

Math
Where is it that tells that cal/g = cal ? And are we talking about calories and grams? What can I say? I am a right brained person :-) Thanks
August 2, 2008 by Julie

Chemistry
What is the quantity of heat evolved when 111.9 grams of H2O(l) is formed from the combustion of H2(g) and O2(g)? H2(g) + 1/2 O2(g) --> H2O(l) Delta Ho = -285.8 kJ
October 26, 2008 by Trevor

chem
You're asked to prepare 125mL of .0321 M AgNO3. How many grams would you need of a smaple known to be 99.81% AgNO3 by mass?
February 7, 2009 by Anonymous

chemistry
An object has a mass of 16.3 grams and occupies a constant volume of 85.2 mL at standard conditions. Calculate the density of the object in g/mL?
August 29, 2011 by cc

Physics
How many grams of water (H_2O}) have the same number of oxygen atoms as 1.0mol of oxygen gas?
November 16, 2009 by ana

Physics/ can Dr. help me
How many grams of water (H_2O) have the same number of oxygen atoms as 1.0 (mol} of oxygen gas?
November 18, 2009 by ana

grade 7 math
How many grams are in one serving of soup if 2.4 kg will serve six people? a. 400 kg b 14.4 kg c. 400 g d. 2400 g
December 15, 2009 by van

Algebra
To reduce 32 grams of a 25% solution of antiseptic to a 10% solution, how much distilled water should a pharmacist add?
March 2, 2010 by Chelsea

CHEMISTRY
What is the hydroxide ion concentration in mol/L of a solution if 0.080 grams of NaOH are dissolved in 2.0 liters of solution?
March 22, 2010 by Confused person

Science
Calculate the solubility in grams per 100 ml of water of potassium sulfate if 1.20 g of the solid dissolves in 10.5 mL of water at 20*C
March 30, 2010 by S.S

chemistry
what is the molar concentration of an aqueous NaOH solution when 45.0 grams are dissolved in water to make 100mL of solution
April 27, 2010 by brad

chemistry
How many grams of chlorine gas are present in a 150.0 liter cylinder of chlorine held at a pressure of 1.00 atm and
July 8, 2010 by Anonymous

chemistry
An aluminum engine block has a volume of 4.86 L and a mass of 12.75 kg. What is the density of the aluminum in grams per cubic centimeter?
August 26, 2010 by maryanne

maths
For the reaction given below, how many grams of Na2CS3 are produced in the reaction of 65.0 mL of liquid CS2 (d = 1.26 g/mL) and 1.56 mol NaOH?
September 21, 2010 by srujan

Chemistry
The density of oak lumber is approximately 800km/m^3. What is the mass in grams of 4 cubic meters of oak? And the work.
September 30, 2010 by Maryanne

chem
In the explosion of a hydrogen-filled balloon, 0.54 g of hydrogen reacted with 6.6 g of oxygen to form how many grams of water vapor?
October 4, 2010 by jeff

Chemistry
How many grams of HCl are produced according to the following equation, H2 + Cl2 = 2 HCl, when 4.0 g of hydrogen reacts completely?
October 25, 2010 by Bill

chem
How many grams of chlorine gas are present in a 150. liter cylinder of chlorine held at a pressure of 1.00 atm and 0.0 įC?
October 28, 2010 by gie

chemistry
If the heat of fusion for ethyl alcohol is 26 cal/g, how many grams must freeze to release 780 cal?
December 5, 2010 by jacee

chemistry........help!! =)
How many grams of FeSo4 are required to prepare 0.50 L of a 0.010 M FeSO4 solution? I don't need the answer just shown how to do it! thanks
December 13, 2010 by Stacy

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