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March 26, 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: 19,464

Chemistry
What is the minimum amount of 1.75 m of HCL necessary to produce 28.5 L of H2 at stp? EQUATION IS AS FOLLOWS: Mg+2HCL->>MgCl2+H2
November 17, 2010 by Ricardo

science
How many moles of oxygen molecules, O2, are required to produce 0.268 mol of K2Cr2O7? Show your work.
December 29, 2010 by Sophie

math
The triangle above has side lengths of 24 mm and 38 mm. Which set of dimensions would produce a similar figure?
January 31, 2011 by Anonymous

chemistry
What temperature is required to produce a carbon dioxide partial pressure of 1.0 ? BaCO3BaO + CO2
March 19, 2011 by vince

Chemistry
Does the mixing of copper (I) nitrate with sodium iodide produce a precipitate? If so, give the molecular equation.
March 23, 2011 by Bruce

Chemistry
Is it possible to have an acid/base reaction and produce a precipitate as a product as well? If yes, provide an example.
March 23, 2011 by Bruce

chemistry
Is it possible to produce a form of sodium ferrate using these components? FeCl3 NaOH NaOCl
April 5, 2011 by Amber

7th grade science
All organisms can________________,or produce offspring that are similar to the parents. Please help! Thank you!
September 13, 2011 by saranghae12

Physics
A 822 kg car accelerates from rest to 101 km/h in 1.15s. What change in momentum does the force produce?
November 16, 2011 by Alyssa

math
The triangle above has side lengths of 18 mm and 26 mm. Which set of dimensions would produce a similar figure?
February 23, 2012 by Anonymous

thermochemistry
what is the formula to find the mass of propane that must be combusted to produce 188.3kj of energy?
August 11, 2012 by Anonymous

Chemistry
What electron transition in a hydrogen atom, ending in the orbit 5, will produce light of wavelength 3040 ?
October 10, 2012 by Anonymous

physics
state the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS 6. +0.50 DS c. +1.75 DS
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
October 24, 2012 by Anyone know the answer to this?

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
October 24, 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
October 25, 2012 by Anonymous

Chemistry
What electron transition in a hydrogen atom, ending in the orbit 4, will produce light of wavelength 2170 nm ?
November 26, 2012 by Chironjit

chemistry
calculate the volume of Nitrogen gas to produce 5.6 dm cube of nitric oxide at STP ,N2 + O2 = 2NO
February 20, 2013 by rupal

Chemistry
How many liters of hydrogen needs to be reacted with chlorine to produce 21g of hydrochloric acid, at STP?
July 21, 2013 by tom

chemistry
Draw the compound that would produce 4-ethyl-3-hexanol in the presence of a nickel catalyst and hydrogen.
November 12, 2013 by mona

chemistry
what current will be able to produce 20 volume of chlorine by electrolysis at STP within one hour?
December 22, 2013 by Nemesi Thadeo

physics
Under what circumstances does a double convex lens produce an image that is reversed left to right?
January 11, 2014 by Lane

microeconomics
if redstone clayworks company want to minimize their average total cost how many units should they produce?
April 12, 2014 by Anonymous

Proximity, alignment, repetition and contrast
Patterns and shapes that appear alike and are grouped together produce
April 24, 2014 by Carolyn

Math
Which of the following transformations will never produce a congruent figure? A. rotation B. reflection C. translation D. dilation <------
May 22, 2014 by Riley

chemistry
What mass of cesium chloride must be added to 0.570 L water to produce a 0.375 m solution?
July 22, 2014 by Anonymous

Organic Chem Help
Can someone explain how crystallization works to produce a product that is purer than the input material. Thank you!
September 23, 2014 by Simon

Chemistry
Determine the acid and base that were neutralized to produce each of the following salts. Li2CO3 (aq). I don't understand how to solve this.
November 25, 2014 by Anonymous

Chemistry
how many moles of solid mg(oh)2 should you ad to 200 ml of .15M acetic acid solution to produce ph 4.0 buffer?
February 28, 2015 by Munavvar

Chemistry
If you wanted to prepare 50.0 mL of hydrogen, collected over water at 25 C on a day when the barometric pressure was 730 torr, what mass of aluminum would you react with a hydrochloric acid? (Balance the equation first.) ___Al(s)+___HCl(aq)=___AlCl3(aq)+___H2(g)
April 8, 2013 by Kate

Chem
If the rocket engine contains 1500.0 g of H2O2 and an excess of N2H4, what volume of water vapor will be produced when the rocket fires up to a temperature of 540oC and a pressure of 1.2 atm? I honestly dont GET this thing, ugh =( Please Help!!
May 28, 2009 by Daniel

Chemistry
Using the balanced reaction, enter the formula, charge(if any), and state of the species (exclude H2O) in solution if Ba(NO3)2(aq) reactant is present in stoichiometric excess. Separate your answers by comma. NaCl(aq) + Ba(NO3)2(aq) → NR
January 29, 2010 by Kevin

Chemistry
How much ammonia is produced if 1.80 m3 of hydrogen reacts with 0.5m3 of nitrogen? Also state which reagent is in excess and by how much? Question is related to the Haber process. Please can anyone answer this for me by 02 July 2010. With all equations. Thanx
June 30, 2010 by Matt

Chemistry
a mixture of 10cm^3 of C5H12 and 0.084g of C12H24 was passed with an excess of oxygen. after cooling to room temperature, the reaidual gas was passed through aqueous potassium hydroxide. what volume was absorbed by the alkali
February 21, 2014 by Ellen Cameron

science
i need to answer these statements true or false:- ive answered some but stuck on others. 1)only animals respire - false 2)respiration uses oxygen 3)respiration uses up carbon dioxide 4)only green plants photosynthesise-true 5)all living things respire- true 6)plants use up and...
October 6, 2009 by olivia

Chemistry!
Nitrogen reacts with hydrogen to make ammonia: N2 + 3H2 -> 2NH3 Calculate the maximum thoeretical yield of ammonia that can be made by reacting 90g of hyrdrogen with an excess of nitrogen. Thanks!
November 13, 2007 by Jessica

maths
An employer pays one and half times the hourly rate for each hour worked in excess of 8 hours. If an employe works 10 hours by what percent are wages of an 8 hour increased (a)25% (b)32.5% (c)37.5% (d)40%
November 20, 2008 by tushar das

Chem.
How can you use the sticky tape activity to find if an object has excess charge that can be transmitted to the computer and ruin the processor? Would it be that you have to find what charge it is and how strong the force is?
November 15, 2009 by Sarah

Chemistry
Excess sodium sulfate is added to exactly 50 mL of a solution containing an unknown amount of silver(I) cation. Determine the concentration of the silver ion in this solution if 3.54 mg of a solid is isolated.
July 11, 2011 by Anonymous

Chemistry
Briefly explain what the consequense would be if excess 6M NaOH solution instead of ^m NH3 solution were used to separate Fe3+ and Al3+ ions from Ca2+, Cu2+,and K+ ions at pH 9-10.
November 27, 2012 by Cherie

Chem
What is the molarity (M) of an HCl solution, 150 ml of which when treated with excess magnesium liberates 3.5 l of H2 gas measured at STP? I know molarity is Moles, volume, but how does magnesium come into play?
April 17, 2013 by Johnie HELPPPPP

Chemistry
Please help me out! Gas law homework! How many liters of HCl (g) at STP can be produced from 5.44 g of Cl2 and excess H2 according to the following equation? H2 (g) + Cl2 (g) --> 2 HCl (g) Thank you so much in advance.
May 28, 2013 by Bridget

general chemistry
a 5.95 g sample of AgNO3 is reacted with excess BaCl2 according to the equation 2AgNO3 + BaCl2 yields 2AgCl + Ba(NO3)2 to give 3.17 g of AgCl. What is the percent yield of AgCl?
October 6, 2013 by Anonymous

CHEMISTRY
2H2S + 3O2 → 2H2O +2SO2 given the balanced equation, if 4 moles of hydrogen sulfide react: How many moles of oxygen consumed? How many moles of water and sulfur dioxide are produced?
May 21, 2012 by Theodore

physics
an oil drop has a charge of 8.0 x 10^-19 C. How many excess electrons does the oil drop have?
April 7, 2011 by Sejul

math
how many grams are in a mL
January 15, 2008 by Jessie

chemistry
28.06 mL to grams
August 26, 2010 by maryanne

math
how many grams are there in 1 km
August 5, 2012 by don

Math OPTIMIZATION
A plastics firm has received an order from the city recreation department to manufacture 9,000 special Styrofoam kickboards for its summer swimming program. The firm owns 10 machines, each of which can produce 30 kickboards an hour. The cost of setting up the machines to ...
September 3, 2011 by Willoby

Statistics
The eggs of a species of bird have an average diameter of 23 mm and an SD of 0.45 mm. The weights of the chicks that hatch from these eggs have an average of 6 grams and an SD of 0.5 grams. The correlation between the two variables is 0.75 and the scatter diagram is roughly ...
March 15, 2013 by Kimberly

chemistry
STANDARD: Put into a clean 250 mL volumetric flask exactly ..... 0.90 ml of 1.00 mM iodate STANDARD. Add an excess of 1M KI and 1M Sulfuric Acid and let stand for 5 minutes. Dilute to volume. UNKNOWN: Pipet into a clean 250 mL volumetric flask 1.00 mL of your UNKNOWN and ...
July 28, 2013 by faruk

Chemistry
Question: Consider following equilibrium system: SO2(g)+ Cl2(g) goes to So2Cl2(g) Kp=.900 atm @25 degree C. Suppose that 2.0 moles S02, 1.0 moles Cl2, and 3.0 moles So2Cl2 are placed in an empty 4.00L vessel at 25 degree C. Compute teh number of grams of each substance present...
March 1, 2009 by eliz

Math
During one year, people in the U.S. older than 18 years old watched a total of 342 billion hours of television. The population of the U.S. older than 18 years old was about 209 million people. On average, how many hours of television did each person older than 18 years old ...
January 4, 2012 by Jane

Chemistry
A potassium hydroxide solution has a pH of 12.90. Enough cid is added to react with half of the OH- ions present. What is the pH of the resulting solution? Assume that the products of the neutralization have no effect on pH and that the amount of additional water produced is ...
May 4, 2010 by Alexa

chemistry
magnesium metal (1.00 mol) and a volume of aqueous hydrochloric acid that contains .500 mol of HCL are combined and react to completion. how many liters of hydrogen gas, measured at STP, are produced? Mg(s) + 2HCL(aq) -> MgCl2(aq) + H2(g)
November 1, 2014 by Anonymous

Chemistry
Write a balanced Chem. Eq 1. Chlorine gas will react with aqueous sodium fluoride if 200J of energy is added and manganese is used as a catalyst. 2. Dinitrogen pentaoxide gas decomposes into its elemental parts.
January 6, 2015 by Rachel

Chemistry
1.2048g sample of impure Na2CO3 is dissolved and allowed to react with a solution of CaCl2 resulting CaCO3 after precipitation, filtaration and drying was found to weight 1.0362g. calculate the percentage purity of Na2CO3
February 14, 2015 by Ana

physics
Two small, identical metal spheres contain excess charges of -10.0 x 10^-6 C and 6.0 x 10^-6 C, respectively. The spheres are mounted on insulated stands and placed 0.40 m apart. Determine the magnitude and direction of the force between the spheres.
May 16, 2012 by R

math
Is a glass of water equal to 30 grams or 300 grams? http://www.calorie-count.com/forums/post/20619.html A "glass" of water could designate any size. If you mean a cup of water, Lance's answer should be sufficient. I hope this helps a little more. Thanks for asking.
April 4, 2007 by dan

science
the alkaline-earth metals react similarly because they all have the same number of electrons in their outer energy level. Which group contains the alkaline-earth meatals?
February 25, 2008 by Lenell

chemistry
very hot sinc will react with steam to form zinc oxide and hydrogen. If 5.4 liters of hydrogen was used to use up 20 g of zinc completely. What is the percent yield of this process
February 12, 2014 by jean

Chemistry
What mass of lithium (in g) is required to react completely with 57.5mL of N2 gas at STP? Lithium reacts with nitrogen gas according to the following reaction: 6Li(s)+N2(g)→2Li3N(s)
March 19, 2014 by Carter

Math Help Needed
A riding-stable manager is planning a nutritional diet for 6 horses. The manager finds the table below in a guide about horse health. The cost of 1000 Calories of horse feed is $.15. What is the cost per day to feed the 6 horses? (Hint: First, try writing an expression for the...
August 26, 2013 by electroShark797

Science(chem)
I have a few questions I need help with! 1. Hydrogen bonding will account for the unusual physical properties of water. TRUE FALSE 2. Air is considered to be a homogeneous mixture that is 79% nitrogen gas, 20% oxygen gas and 1% all the other gases. In this mixture, nitrogen ...
March 12, 2008 by salinas

Chemistry
Five (5.00) grams of glucose, C6H12)6, is dissolved in 500.0 grams of acetic acid. What is the new freezing point and boiling point for the solution? Kf acetic acid = 3.90, Kb acetic acid = 3.07 (normal freezing point for acetic acid = 16.60 dg C, boiling point = 118.5 dg C) f...
August 9, 2007 by lana

Chemistry
Potassium permanganate reacts with sulfuric acid as per the equation shown below. Indicate the amount of excess reactant after the reaction of 7.24g KMnO4 and 10.32g H2SO4? 4KMnO4+6H2SO4 = 2K2SO4 +4MnSO4 +6H2O + 5O2
September 14, 2010 by Missy

Statistics/probability/maths
Please I Need Help With This Question Showing All Steps...Thank You :) The average number of units that the factory workers at Benzo company assemble per week is μ = 45 with a standard deviation of σ = 12. Assume that the distribution of units assembled is normal. ...
August 2, 2011 by evangeline johnny

Chemistry
why do hydrogen peroxide and bleach react like they do, and how is the hydrogen peroxide a catlyist?
February 18, 2010 by Anonymous

Chemistry
Hi DrBob, Sorry about that, I wasn't very clear! Can someone please help me complete these calculations for my lab; I am having some trouble. A. Standardization of Na2S2O3 -Mass of KIO3 in 100mL = 0.09600g -Calculate Molarity of KIO3= ? Please check: 0.09600g/(214.0g/mol)=4....
March 6, 2011 by Bryant

Economics
A monopolist is in long-run equilibrium and earning economic profits equal $100 million. The government imposes a lump sum tax of $100 million on the monopolist. (A limp sum tax is a tax the monopolist must pay regardless of its level of output) Will this tax: a) cause the ...
December 3, 2011 by Jim

Chemistry
I recently did an experiment on Aldol Condensation, by reacting Benzaldehyde with Acetone to form Dibenzalacetone. The proposed stoichiometric ratio of Benzaldehyde:Acetone is 2:1. What would be the implications if either of the reactants is in excess?
February 12, 2010 by Alan

AP Chemistry
a 5.15g sample of a hydrocarbon is burned in oxygen, producing 15.6g of carbon dioxide and 8.45g of water. Assuming an excess of oxygen, what is the empirical formula of the hydrocarbon? how do i set this problem up and how do i solve it?
September 13, 2011 by Ariday

chemistry
If 6.57 g of iron are reacted with an excess of hydrochloric acid, HCI, then hydrogen gas and14.63 g of iron (III) chloride are obtained. calculate the theoretical yeild and percent of yeild of FeCl3.
February 7, 2012 by haley

physics
A small cork with an excess charge of +7.0 C is placed 0.16 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 10 9 N m2 /C 2 . Answer in units of N
February 26, 2012 by ivan

Physics
A small cork with an excess charge of +6.0 C is placed 0.25 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 10 9 N m2 /C 2 . Answer in units of N
April 29, 2012 by Angel

chem
Consider the fermentation reaction of glucose: C6H12O6 ----) 2C2H5OH+2CO2 A 1.00-mol sample of C6H12O6 was placed in a vat with excess yeast. If 35.1 g of C2H5OH was obtained, what was the percent yield of C2H5OH?
March 14, 2013 by shane

Chemistry
A metal M forms the sulphate M2(SO4)3 . A 0.596 gram sample of the sulphate reacts with excess BaCl2 to give 1.220 g BaSO4. What is the atomic weight of M? (Atomic weights : S = 32, Ba = 137.3)
July 26, 2014 by Susan

chemistry
In the 1970s, when lead was widely used in "ethyl" gasoline, the blood level of the average American contained 0.25 ppm lead. The danger level of lead poisoning is 0.80 ppm. (a) What percent of the average person was lead? (b) How much lead would be in an average 80 kg person...
March 19, 2012 by Hannah

microeconomic
a. Calculate the total cost, the average variable cost, the aver-age total cost, and the marginal cost for each quantity of output. b. What is the break-even price? What is the shut-down price? c. Suppose that the price at which Kate can sell catered meals is $21 per meal. In ...
November 18, 2008 by gabrielle

chemistry
0.872g sample containing only NaBr and KBr gives 1.052g AgBr. what's the % of each salt? This is the type of problem that cannot be answered without other information. I think you have made a typo in your problem I worked through it and I get negative numbers for the mass of ...
December 12, 2006 by hayat

Economics
Can you tell me please if my answer is right to the following question? The question: present Adam Smith's theory of value and limitations. 1. Labor cost: he supported that everyone must produce his own goods using own labor and exchange the surplus with other goods. In this ...
February 25, 2012 by Anna

Chemistry
Calculate the mass of sodium chloride (NaCl) produced when 5.50 moles of solid sodium reacts in excess chlorine gas. (Hint: Start by writing a balanced chemical equation) Please help me understand HOW to solve this problem.
May 27, 2009 by Ryan

chemistry
briefly explain why excess HCl and NaOH solutions must be collected for treatment before disposal, but the titration solution from a completed titration can be safely poured into the drain, diluting with a large amount of water.
March 23, 2011 by Anonymous

chemistry
suppose 5.00g of sodium carbonate reacts completely with excess of hydrochloric acid. Show how to calculate the mass (g) of sodium chloride that would be formed. Na2CO3 + 2HCl = 2NaCl + CO2 + H2O What is the limiting reagent?
July 21, 2011 by stephanie

College Physics
Two tiny, spherical water drops, with identical charges of -7.10 x 10-16 C, have a center-to-center separation of 1.23 cm. (a) What is the magnitude of the electrostatic force acting between them? (b) How many excess electrons are on each drop, giving it its charge imbalance?
July 6, 2012 by Stephanie24

chemistry
A 0.200g sample containing mn02 was dissolved and analyzed by addiction of 50ml of 0.100M fe to drive the reation. The excess fe required 15ml of 0.0200 m kmn04. Find % mn304 fw 228.8mg/mmol in the sample? who helps me
December 9, 2012 by Fai

chemistry
A 1.252g sample containing iron is dissolved and converted to FE 2+ followed by addition of 25ml of 0.01M k2 cr2 07. The excess K2cr207 required 6.85 ml of 0.015M. Find the percentage FE304 FW 231g/mol in the sample. The right 7.96% Who helps me
December 16, 2012 by Fai

chemistry
Polyglycolic acid, PGA, is a polymer that we know rather well how to control the structure of (even though there are currently only limited applications). So in the lab we have created two types of PGA for testing, a linear chain PGA and a branched chain PGA. Assume comparable...
December 21, 2013 by Dick

programming
Write a MATLAB program to create and output the touch-tone telephone signals (Dual-Tone, Multi-Frequency, DTMF) for the input numbers 0 through 9 (disregard the * and # symbols). When a user presses a button on a telephone set, a signal is produced that is the sum of two ...
October 5, 2014 by Amanda

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

science(chem)
NaClO3 + H2O + HCl=> what form is the Cl in ? I know that a gas is formed but the reaction that I did also had Cl reacting with the reactants so I'm not sure in what form of Cl did my reactant react with the product of the above reaction. Thanks
April 6, 2008 by ~christina~

BIOLOGY
Table Sugar can react with water to form 2 other compounds, glucose & fructose. But, when you add sugar to a glass of water the reaction is very slow - WHY? What would it need to speed it up?
December 11, 2008 by JOHN

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

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

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