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February 27, 2015

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: 19,221

Chemistry
What effect do each of these have on the freezing point of the solvent? a. a nonvolatile solute that dissociates in the solvent b. a volatile solute that does not dissociate c. two solutes that react according to the equation: A+B---> C Please explain why.
June 23, 2009 by Sylvia

Socials
Soldiers often react automatically during a battle because of their training. What would happen if they paused to think about what they were doing? I think they would just get shot by their enemies. Is there anything else I can add to that?
November 3, 2009 by Sara

english
1. would it be difficult to procure in the desert? 2. how might someone react if you prvoke that person? 3. what might be the subject of a profound discussion? 4. if a critic is profuse in her praise of a movie, how well did she like the movie?
January 23, 2011 by halley

Chemistry
How many milliliters of 0.0850 M Na3PO4(aq) will react with 22.00 mL of 0.0800 M MgCl2(aq)? 3 MgCl2(aq) + 2 Na3PO4(aq) ==> Mg3(PO4)2(s) + 6 NaCl(aq) V x M = V x M (22.00mL)(0.0800M) = (0.0850M)(x) Is this the correct set-up? Does it have 4 sigfigs, or am I wrong?
June 30, 2011 by Bradley

CHEMISTRY
A FALSK CONTAINS 49.8 mL OF 0.150 CALCIUM HYDROXIDE. HOW MANY MILLILITERS OF 0.500 SODIUM CARBONATE ARE REQUIRED TO REACT COMPLETELY WITH THE CALCIUM HYDROXIDE IN THE FOLLOWING REACTION? Na2CO3(aq)+ Ca(OH)2(aq)CaCO3(s)+2NaOH(aq)
October 23, 2012 by HAMZA

English
Their Eyes Were Wtaching God By:Nora Zeal Hurston. "to be a pear tree - any tree in bloom!" (11). The image suggests a wholeness - as bees pollinate blossoms paralleling human sexual intercourse. What does that mean? What is another way to say that? Bees pollinating blossoms ...
August 8, 2007 by Margie :D

Chemistry [back-titration] - please check my sol'n
A 7.00 gram sample containing the mineral tellurite was dissolved then treated with 70.0 mL of 0.03114 M K2CrO7. 3 TeO2 + Cr2O7 ^2- + 8 H+ -> 3 H2TeO4 + 2 Cr3+ + H2O When reaction is complete, the excess Cr2O7 2- required a 14.05 mL back titration with 0.1135 M Fe2+. ...
March 19, 2014 by Nina

chem
can someone plz help me with this? What mass of sucrose (C12H22O11) must be dissolved to make 460 mL of a 1.10M solution? thanks concentration= molessolute/volume moles solute=conc*volume massSolute/molmassSolute=conc*volume masssolute=conc*volume*molmassSolute volume is in ...
April 16, 2007 by Mary

CHEM Help!
My homework is about translating word equations and I need help in answering this question. Sodium phosphate reacts with calcium nitrate to produce sodium nitrate and calcium phosphate. What would be the answer? I also need help with this other question because it is kind of ...
March 11, 2008 by Anony

Economics
adam smith supported three different views of theory of value (are the followings correct, i will add them to my essay) 1. Labor cost: he supported that everyone must produce his own goods using own labor and exchange the surplus with other goods. In this model of society no ...
February 25, 2012 by Ana

Chemistry
Starting with propane, show all the steps required to produce propanone. Anyone know how to answer that question? Please help!
January 31, 2007 by Mei

Anatomy
Lying by the pool on a sunny day will produce an increase in the protein a Melanin b keratin c sebum d collagen?
May 5, 2008 by Jin Kobeaux

chem
What electron transition in a hydrogen atom, starting from the orbit 10, will produce infrared light of wavelength 3040 ?
October 26, 2008 by tomi

chemistry
When combined with cupric ions (aq, 1M) which will produce the largest standard cell voltage? a. ) KMnO4(aq) b. ) MnO2(s) c. ) MnCl2(aq) d. ) Mn(s)
November 23, 2008 by Anonymous

chemistry
How many milliliters of glycerol, d=1.26 g/ml, must be added per kilogram of water to produce a solution with 4.55 mol% C3H8O3 ?
February 20, 2010 by sab

11th grade Physics
What voltage is necessary to produce a current of 200 amperes through a resistance of 1 x 10^-3 ohms?
April 4, 2010 by Javier

chemistry
consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP?
April 26, 2010 by Zoe

CHEMISTRYYY
consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP?
April 26, 2010 by Justin

science
what mass of formic acid must be dissolved in 250 ml of deionized water to produce a solution of pH 1.83?[ka of HCOOH=1.77*10^-4, Mw=46]
September 23, 2010 by Joy

biology
What effect does limiting fat and cholesterol intake have on the body's ability to produce these hormones and how will these manifest?
February 2, 2011 by Anonymous

chemistry
When dissolved in 1000 g of water, which chemical compound will produce a solution with the greatest freezing point depression?
June 17, 2011 by mercedes

Chemistry
Calculate the molecular mass of sulphur if 35.5 g of sulphure dissolves in 1 00 g of CS2 to produce a solution that has a boiling point of 49.48 c.
November 2, 2011 by Ethio

chemistry
What mass of potassium nitrate would you have to heat in order to produce 1.00dm of oxygen at rtp?
February 23, 2012 by Nicole

math
How many people would it take to produce a human pyramid 12m tall? Give various methods
February 29, 2012 by kelsey

CHEMESTRY
C3H8+5O2=3CO2+H2O How many liters of propaine (d=0.585g/ml) will produce 1.25L of water (d=1.00g/mL)?
April 14, 2012 by Anonymous

physics
What frequency would you need to produce a sound wave in room-temperature air with a wavelength of 9 m? the answer in Hz
April 23, 2012 by michelle

ECONOMICS
What is the economic term for productive resources that provide a means for society to produce and distribute its goods and services?
June 5, 2012 by Brad Imahara

chemistry
what is the formula to determine the mass of propane that must be combusted in order to produce 188.23kJ of energy?
August 11, 2012 by janet

Biology
Produce a self portrait showing you carrying out the characteristics of life. Could you explain what exactly is expected of me.
September 4, 2012 by fatima

science
how has the process of natural selection helped to produce organisms which posses specific adaptions to help them survive in their environment?
October 4, 2012 by cristina

Science
How was the process of natural selection helped to produce organisms which possess specific adaptations to help them survive in their environment?
October 4, 2012 by Anonymous

physics
State the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS b. +0.50 DS c. +1.75 DS Is a -6.75DS?....
October 23, 2012 by Help

physics
State the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS b. +0.50 DS c. +1.75 DS Is a -6.75DS?....
October 23, 2012 by Help please!

Physical Science
Greyhounds can accelerate at 7/m/s2 at a start of the race . How much force does it take a 35 kg dog to produce this acceleration?
December 11, 2012 by Casey

Science
In the chlor-alkali process, the mass of NaCl(s) required to produce 0.793 kg of chlorine gas is _____ kg.
January 28, 2013 by Allan

Chemistry
In the chlor-alkali process, the mass of NaCl(s) required to produce 0.793 kg of chlorine gas is _____ kg.
January 28, 2013 by Allan

Environmental Science 11th grade
The process of separating 238-U to produce material containing a higher concentration.
February 7, 2013 by Anonymous

Chemistry 12
Calculate the volume of 12 M Na2SO3 which needs to be added to 500.0 mL of water in order to produce a solution in which [Na+]= 0.200 M.
October 8, 2013 by Riann

chemistry
Draw the compound that would produce 4-ethyl-3-hexanol in the presence of a nickel catalyst and hydrogen.Plaese help!!!!!
November 13, 2013 by mona

chemistry
Draw the compound that would produce 4-ethyl-3-hexanol in the presence of a nickel catalyst and hydrogen.Please help!!!!!
November 13, 2013 by mona

chemistry
Draw the compound that would produce 4-ethyl-3-hexanol in the presence of a nickel catalyst and hydrogen.Please help!!!!!
November 14, 2013 by mona

biology
In a cross of heterozygous RW four o'clock plants (RW x RW) what proportion of the seeds will grow to produce pink flowers? A. 0 B. 0.25 C. 0.5 D. 0.75
November 28, 2013 by orpheus

Chemistry
What mass of ammonium nitrate is require to produce 145L of N2O at 2850 torr and 42 degree celcius
September 28, 2014 by Paula

Chemistry
How many moles of solid Mg(OH)2 should you add to 200mL of 0.15M lactic acid solution to produce pH 4.0 buffer?
October 13, 2014 by Kiko

Chemistry
How many moles of solid Mg(OH)2 should you add to 200mL of 0.15M lactic acid solution to produce pH 4.0 buffer?
October 13, 2014 by Kiko

CHEMISTRY-URGENT
A 4.43 gram sample of phosphorus was burned in air to produce 10.15 g of an oxide. What's the empirical formula of this compound?
January 6, 2015 by Ellie

Chemistry
I need to predict the acid/base reactions of sodium carbonate with HCl, CH3COOH, NH3, and NaOH. I'm stuck, when I'm writing out the ions to find the strongest acid and base, does the NaHCO3 become Na and HCO3, or N, H, and CO3? Also, would these be polyproptic? NaHCO3 ==> ...
March 19, 2007 by Lyn

math
A company wants to send out a mailer. A mailer be sent only if it has an envelope and a stamp. For the number of mailers printed, the company has only 1/2 the number of envelopes needed. Of those mailers for which there are envelopes, the company has only 1/3 the number of ...
July 23, 2014 by Johnny

College Chemistry
i was told to Convert 1 metric ton to grams ore then to grams TiO2 (using the 0.75% in the ore), then to g TiCl4 (using the 70%%) and finally to TiO2 final product (using the 93.0%)for the following questions, but im stuck after converting the metric ton to grams About half ...
October 17, 2011 by Anonymous

Organic chem
When you react 1-octene wih borane tetrahydrofuran solution and hydrogen peroxided over NaOH and water... (hydroboration- oxidation reaction) how do you run the reaction differently to improve the yield of the major product 1-octanol?
November 4, 2009 by Sonia

Chemistry
Zinc sulfide and oxygen gas react to form oxide and sulfur dioxide. Determine the amount of ZnO that should be produced in a reaction between 46.5 g of ZnS and 13.3 g of oxygen. What is the mass of the xs reactant? Please show work
February 15, 2012 by Christian

chem
Why do we use excess reactants in a chemical reaction? Why are percent yields usually less than 100%? Is it because we want to maximize the amount of products produced, and reactions usually end up in a loss of reactants to the air, etc?
March 13, 2009 by bob

organic Chemistry
In my Organic chemistry lab, the calculated enantiomeric excess was over 100% . Is this possible? and If not, what sort of error could have been made? *the observed optical rotation was read correctly
November 23, 2009 by jenny

Chemistry
10. Cyclopropane is an anesthetic that is 85.6% carbon and 14.37% hydrogen by mass. What is the molecular formula of the compound if 0.45 L of cyclopropane reacts with excess oxygen at 120. C and 0.72 atm to form a 1.35L of carbon dioxide and 1.35 L of water vapor?
January 26, 2011 by Cherie

physics
true or false a small plastic ball has an excess negative charge on it. if a magnet is placed close to this ball, it will either attract or repel the ball, depending upon which pole is closer to the ball.
March 9, 2012 by fatih

physics
A small cork with an excess charge of +5.0 C is placed 0.14 m from another cork, which carries a charge of −3.2 C. What is the magnitude of the electric force between the corks? The Coulomb constant is 8.98755 109 N m2/C2. Answer in units of N
April 19, 2012 by jenny

physics
A ball is thrown from the top of a building with an initial velocity of 30m/s straight upward, at an initial height of 50m above the ground. The ball just misses the edge of the roof on is way down and hits the ground. Determine: a) time needed for ball to reach max height. B)...
February 16, 2011 by mark matat

chemistry
25.0 g of sodium carbonate is combined with an excess of hdrochloric acid. in the end 5.70 g of sodium chloride is isolated. what is the percent yield of sodium chloride
November 15, 2011 by Anonymous

chemistry
You are given 28.0 of aluminum and 33.0 of chlorine gas. Part A If you had excess chlorine, how many moles ofof aluminum chloride could be produced from 28.0 of aluminum?
September 17, 2012 by teresa

economics
Suppose that the reserve ratio is .25, ad that a bank has actual reserves of $15,000, loans of $40,000, and demand deposits of $50,000. Excess reserves are $
August 18, 2014 by Harold

Economics
6. The idea that countries should produce and sell goods that they produce most effectively and efficiently, and buy goods that other countries produce most effectively and efficiently, is known as A. absolute advantage theory. C. efficiency balanced trade. B. free trade. D. ...
January 23, 2012 by Heather

Chemistry
An excess of aqueous AgNO3 reacts with 24.5 mL of 5 M K2CrO4(aq) to form a precipitate. What is the precipitate? Answer: Ag2CrO4 What mass of precipitate is formed? Answer in units of g.
March 23, 2011 by Mary

Chemistry
Calculate how much acetylene (C2H2) can be produced from 358 g of H20 and an excess of CaC2 if the perfect yield for this reaction is 94.5% CaC2+H2)-> C2H2+C2H2+CA(OH)2
July 20, 2013 by Sara

Chemisry
6M HCl + 1M NaOH => NaCl + H2O If I'm understanding this correctly, all of the NaOH is used up because the molarity is 1 where the HCl's is 6 this leaves excess HCl correct?
August 26, 2013 by Jenna

chemistry
i need to know if I am in the right tract please let me know...I am calulating the molality of the following exercise so I could be able to apply the formula T=Kf * molality calculate the freezing point of a solution containin 12.2 grams of benzoic acid, dissolved in 250 grams...
October 27, 2008 by Joshua

Chemistry
Are these correct? 1. What is the formula mass for Mg(ClO3)2? mg=24.31 cl=35.45 x 2 = 70.9 o=16 x 6 = 96 24.31+70.9+96= Answer:191.2 amu 2.How many molecules of CO2 are in 4.5 moles of CO2? 4.5 x 6.022 x10^23=Answer 2.7x10^24 3.How many grams are in 9.21 moles of H2CO3? h=1....
October 25, 2009 by Mattt K

Math
Can I get some help with this question please? Calculating break-even. Jasmine Gonzales, administrative director of Small Imaging Center, has been asked by the practice members to see if it is feasible to add more staff to support the practices mammography service, which ...
August 11, 2013 by Faith

medicine
how can i solve this?prepare 150ml of a 7.5%dextrose sol.you have D5%W and D10%W. how much of each sol. is needed? I assume the 7.5 dextrose is going to be on a w/w basis also. This is really simple, no algebra needed. Since 7.5 is halfway between 5 and 10, use equal volumes ...
December 2, 2006 by rimple

science
Calculate the buoyant force in air on a kilogram of gold (whose density is about 19 grams per cubic centimeter). The density of air is 1.3 ✕ 10-3 grams per cubic centimeter. Remember that the buoyant force is equal to the weight of a volume of air that is equal to the ...
August 2, 2014 by Zoey

Economics
In an economy where a unit of labour can produce either 1 unit of x or 4 units of y (or any linear combination of the two) and a unit of capital can produce either 4 units of x or 1 unit of y (or any linear combination of the two). There are 100 units of each means of ...
July 27, 2006 by Zann

Chemistry
Hydrogen Fluoride is produced from the reaction of calicum fluoride are reacted with an excess of sulfuric acid. How much hydrogen fluoride is formed if the percent yield is 93.0%?
February 28, 2011 by Toni Jones

Chemistry
A saturated solution of Mg(OH)2 is prepared having a large excess of Mg(OH)2. Sn(NO3)2 is added to the solution. Ksp = 1.9 x 10^-11 for Mg(OH)2 and Ksp = 6.0x10^-26 for Sn(OH)2. What [Sn2+] is required so that the [Mg2+] in solution will be 0.15 M?
March 26, 2011 by Nikki

fifth grade
how many grams in a lb.
September 30, 2008 by Samantha

MATH
How many grams are there in 2 1/4 Kilograms?
October 4, 2008 by Rikki

chemistry
How many moles is 66.02 grams of Fe?
March 11, 2009 by chris

Chemistry
How many grams are in a milliliter?
September 21, 2009 by Josh

chemistry
3.47*10^23 mass in grams
June 9, 2010 by Kyree

Math
14 grams=__kg
October 12, 2010 by Kim

chemistry
number of 32.0 grams Br^2
July 11, 2011 by tresha

ap chemistry
How many grams of ammonium
November 3, 2011 by jenell

chemistry
how many grams are in 49.0 mL of NaOH
March 13, 2012 by jasmine

geometry
Find (5/8) of 1 kg, in grams.
March 18, 2012 by supastarrr

Chemistry
How many grams of Ca(OH)2 are in 6.5 moles?
June 11, 2013 by Shakena

Science
How many grams are in 3CuCl2
November 7, 2013 by Ryan

Science
How many grams are in 3CuCl2
November 7, 2013 by Ryan

science
Bill finds an unusual object and wishes to calculate it's density. He discovers a problem of accurately weighing it, because it won't stay on the weighing pan. To solve this he adds the object to a beaker containing 59 mL of distilled water and finds the water level rises to ...
August 18, 2009 by Arthur

CHEM
Which of the following reactions should be fast at room temperature? Which would be slow? Explain A. KCl+AgNO3->KNO3+AgCl B. H2(g)+Cl2(g)->2 HCL(g) I would assume that B would react faster because it has all gases.??
January 18, 2012 by john

chemistry
the chemical equation of nicotinic acid is C5H4NCOOH + NaOH --> C5H4NCOONa + H2O i need to calculate the intial molar concentration of this acid, based on the ratio in which the acid and base react. Please help i cant figure it out,
January 14, 2013 by lisa

Business law
Grocery, Inc., is a retail grocery store chain based in Any State, U.S.A. and has stores throughout the United States. Grocery, Inc. has written contracts with many different vendors to purchase the products they sell in their stores. Vendors range from individuals to ...
June 17, 2012 by Cho Ramirez

chemistry
I have posted this once and still cannot get the correct answer. Determine the mass of carbon monoxide that is produced when 45.6 of methane, CH4, react with 73.2 g of oxygen , O2. The products are carbon monoxide and water vapour.
August 3, 2010 by Kelsey

chemistry
What volume (in Liters) of oxygen must react to form 17.0L of carbon dioxide according to the following balanced equation: 2CO(g) + O2(g) --> 2CO2(g) 17.0 L CO2 x (1 moles O2/2 moles CO2) = 17.0 x (1/2) = 8.5 L did i do this problem correctly
October 17, 2010 by christine

Intro to chemistry
Determine the volume of 2.3 M H3PO4 that can completely react with? 340 mLs of a 5.1 M solution of NaOH according to the reaction: 3 NaOH + H3PO4 --> Na3PO4 + 3 H2O stuck on a homework problem..pls help!
November 15, 2010 by tc

Chemistry
Which one of the following pairs of reactants would react together in a Lewis Acid/Lewis Base reaction? a. KOH and HNO2 b. NaOH and HCl c. CH3COOH and HF d. Ag+ and NH3 e. HClO and NH3
February 27, 2011 by Brian

Chemistry
Help me please wether i d0ne it right,what is the mass of calcium carbonate is required to react with sulfur dioxide produced by burning 1000 kgs of coal that contain 5% sulfur by mass?tnx
April 28, 2011 by joy

CHEMISTRY
Hydrogen gas and iodine gas react via the equation, H2 + I2 <--> 2HI, and K=76 at 600K. If 0.05 mole of HI is placed in a flask at 600K, what are the equilibrium concentrations of HI, I2, H2? I am very lost at where to even start with this problem
March 18, 2012 by Kristen

science
why is it needed?
October 5, 2007 by alfjalkf

math
help needed
July 27, 2011 by sober

chemistry
Given the following reaction: 4 KO2 + 2 H2O + 4 CO2 ==> 4 KHCO3 + 3 O2 How many moles of O2 will be produced if 2.46 moles of CO2 react completely? moles
January 20, 2009 by bob

chem
What would be the reaction between Mn2+ and NH3? is it Mn(NH3)? and would this solution react with HNO3, considering it would already have NO3 in it?
November 1, 2010 by nicole

Chemistry
A 0.327 g sample of a mixture of NaOH(s) and NaCl(s) requires 31.5 mL of 0.150 M HCl(aq) to react with all the NaOH(s). What is the mass percentage of the NaOH(s) in the mixture?
November 14, 2014 by Lexie

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