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March 31, 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: 19,498

chemistry
What is the chemical equation for the reaction of manganese metal with sulfuric acid to produce aqueous manganese (II) sulfate and hydrogen gas
February 24, 2011 by Anonymous

chemistry
How many mL of 0.250 M MgCl2 must be added to 350.0 mL of 0.250 M NaCl to produce a solution in which the concentration of chloride ion is 0.300M Cl-?
August 30, 2011 by Holly

PHYSICS PLZ HELP!!!
What is the minimum number of 70 -Ohms resistors that must be connected in parallel to produce an equivalent resistance of 13 Ohms or less?
May 16, 2011 by mink

science
3x10 power 18 photon of certain light radian are found to produce 1.5 j of energy calculate wavelength of light radiation
June 24, 2011 by raghvendra

physics
how much must a car produce to drive 150 km if an average force of 500 N must be maintained to overcome friction?
April 29, 2012 by Anonymous

SCIENCE
which process does not produce a physical change of state? A) MELTING ICE B) HEATING WATER VAPOUR C) FREEZING WATER D) MY GUESS IS
December 13, 2012 by Taillen

scuence
if known h2 + br2 produce delta h 2hbr totaled 11.2 -72 then to decipher hbr gas into H2 and br2 as much heat is required?
November 18, 2013 by febhie

Physics
Two noises produce sound levels of 70 and 80 dB when acting separately. Find the sound level in dB when the sources act together.
December 6, 2014 by Suzanne

CHEMISTRY
CALCULATE THE MASS OF Na3PO3 PRODUCED AFTER 28.0g OF H3PO3 IS TREATED WITH 42.0g OF NaOH, AND ALSO CALCULATE THE MASS REMAINING OF THE EXCESS REAGENT. H3PO3+ 3NaOH = Na3PO3+ 3H2O
April 19, 2011 by dana

game theory
Two companies, A and B, produce widgets. Each can produce 0, 1, 2, 3, or 4 widgets (they can’t produce fractions of widgets). Let X be the number of units produced by A, and Y be the number of units produced by B. Given X and Y, widgets will sell at a price equal to $(14-X-Y...
May 5, 2011 by Phil

chemistry
A patient with polycythemia vera(excess production of red cells) receives raioactive phosphorus-32. Why would this treatment reduce the production of red blood cells in the bone marrow of the patient?
October 7, 2012 by Boo Boo

chemistry
A 2.33-g sample of a mixture of CaCl2 and Ca(NO3)2 is treated with excess AgNO3(aq). The precipitate is filtered off, dried and weighed. The dried precipitate weighs 3.9 g. What is the percentage by mass of CaCl2 in the original mixture?
October 7, 2012 by Kevin

Chemistry
Aluminum oxide is formed by reaction of excess oxygen with aluminum. 4 Al(s) + 3 O2(g) -> 2 Al2O3(s) Calculate the mass of aluminum required to form 18.2 kg of aluminum oxide if the reaction has a percent yield of 83.4%.
October 2, 2014 by Cj

chemistry
Nitric acid can be produced by the reaction of gaseous nitrogen dioxide with water. 3NO2(g) + H2O(`) −! 2HNO3(`) + NO(g) If 745 L of NO2 gas react with water, what volume of NO gas will be produced? As- sume the gases are measured under the same conditions.
February 7, 2012 by Aaron

Chemistry
Air in the vicinity of a local power station contains 8.8x10^-4 gm^-3 SO2. What volume of 0.001moldm^-3 Iodine solution would be required to react with a solution obtained from 200dm^3 of contaminated air? The equation given is SO2 + I2 + 2H2O ==> H2SO4 + 2HI Thanks! :)
January 26, 2013 by Matt

Chemistry
In the SN2 mechanism, considering that the nucleophile attacks at the same time as the leaving group leaves, what would the effect of having a hindered (crowded) reaction center be on the rate of the reaction? Would you expect it to react slower or faster than an unhindered ...
April 14, 2014 by Laura

chemistry
How many milliliter of 0.150 M H2SO4 (sulfuric acid) are required to react with 1.87 g of sodium hydrogen carbonate, NaHCO3, according to the following equation? H2SO4 + 2NaHCO3 --> Na2SO4 + 2H2O + 2CO2 dont understand this am i suppose to change 1.87 into Molarity for ...
July 23, 2011 by Henry

Advanced Accounting
Estimated and Actual Goodwill Passion Company is trying to decide whether or not to acquire Desiree Inc. The following balance sheet for Desiree Inc. provides information about book values. Estimated market values are also listed, based upon Passion Companys appraisals. ...
April 11, 2010 by Tina

English
1. I liked the work very much because I could help orphans who needed love. 2. I liked the work very much because I could help children who had no father and mother. 3. I liked the work very much because I could help orphans who needed care. 4. I liked the work very much ...
October 24, 2010 by rfvv

Biology 101
1. Which of the following statements is incorrect about homologous chromosomes? a. Homologous chromosomes are similar but not identical b. Homologous chromosomes have the same size and function c. Homologous chromosomes contain genes for the same kind of protein products d. ...
October 23, 2013 by Phillip

Chem
The hydrolysis of sucrose into glucose and fructose in acidic water has a rate constant of at 25 degrees C. Assuming the reaction is first order in sucrose, determine the mass of sucrose that is hydrolyzed when 2.60 L of a 0.150 M sucrose solution is allowed to react for 190 ...
February 28, 2010 by Katherine

Chem
With which of the following will the weak acid HCHO2 react? If a reaction occurs, write the balanced molecular equation. If no reaction occurs write the left half of the reaction and use "NR". Do not include physical states in your answers. KOH: NH3:
November 1, 2011 by Colt

Chemistry
write out the balanced equation when Iron(II) sulfate, potassium permanganate, and sulfuric acid react to form Iron (III) sulfate, manganese (II) sulfate, Potassium sulfate, and water.
October 14, 2013 by Jane

Chemistry
A 11.0-mL sample of an unknown H3PO4 solution requires 116mL of 0.140 KOH to completely react with the H3PO4. What was the concentration of the unknown H3PO4 solution (answer in M). H3PO4(aq) + 3KOH(aq) --> 3H2O(l) + K3PO4(aq)
July 23, 2014 by April

chemistry
Determine the mass of KHP (molar mas = 204.2 g/mol) that is required to react with 30.0 mL of 1.0 M Na0H (molar mass 40.0 g/mol)if the reaction is NaOH + KHP --> NaKP + H2O
October 13, 2011 by chris

chemistry
At a certain temperature, the Equilibrium constant, Kc, for this reaction is 53.3. At this temperature, 0.500 mol of H2 and 0.500 mol of I2 were placed in a 1.00-L container to react. What concentration of HI is present at Equilibrium? equation: H2 + I2 = 2HI
December 11, 2012 by cody

Ms. Sue
Say you make the following assumptions: 1. Afarmer lives on 1 hen per day for a year. (2.)1 hen eats 25 grasshoppers per day (3.)1,000 grasshoppers have a mass of 1 kg (4.) 1 grasshopper requires about 30g of soy beans per year (5.) 1 human requires about 600 grasshoppers per ...
July 14, 2009 by devon

chem
Heating an ore of antimony (Sb2S3) in the presence of iron gives the element antimony and iron(II) sulfide. Sb2S3(s) + 3 Fe(s) 2 Sb(s) + 3 FeS(s) When 10.9 g Sb2S3 reacts with an excess of Fe, 9.84 g Sb is produced. What is the percent yield of this reaction? could you please ...
March 31, 2010 by caroline

help me physics
The femur is a bone in the leg whose minium cross-sectional area is about 3.60 E-4 m2. A compressional force in excess of 6.90 E4 N will fracture this bone. (a) Find the maximum stress that this bone can withstand. 1 N/m2 (b) What is the strain that exists under a maximum-...
November 16, 2010 by william

Science
Consider the combustion of propane: C3H8(g)+5O2(g) yields 3CO2(g) + 4H2O(l) delta H= -2221 kJ Assume that all of the heat comes from the combustion of propane. Calculate delta H in which 5.00g of propane is burned in excess oxygen at constant pressure.
November 13, 2011 by Shellby

Chemistry
Consider the combustion of propane: C3H8(g)+5O2(g) yields 3CO2(g) + 4H2O(l) delta H= -2221 kJ Assume that all of the heat comes from the combustion of propane. Calculate delta H in which 5.00g of propane is burned in excess oxygen at constant pressure.
November 13, 2011 by Shellby

physics
Due to a disease the main artery is enlarged and the area of cross-section bacame 1.6 times the previous value. The speen of the blood in unenlarged artery is 0.4 m/s. what is the excess pressure on the walls of the artery due to enlargement. (density of blood is 1060 kg/m^3
January 19, 2012 by Anonymous

Physics
A femur is a bone in the leg whose minimum cross sectional area is about 4.0 x 10^-4 m^2. A compressional force in excess of 6.8 x 10^4 N will fracture this bone. A.) Find the maximum stress that this bone can withstand and B.) What is the strain that exists under a maximum ...
February 23, 2013 by Lori

Chemistry
The chemical reaction of 100 g of salicylic acid, C7H6O3, with excess acetic anhydride produces 50.0 g of aspirin, C9H8O4, according to the equation. What is the percentage yield for the reaction shown below? Please show your work. C7H6O3 + C4H6O3 → C9H8O4 + C2H4O2
February 27, 2010 by Marian

economics
For example the productive needs of the firm would be to set (Marginal Revenue = Marginal Costs (MR = MC) and create excess profits for the firm. However, as far as what is in the best interests of society it might be Price or (Average Revenue) = MC. Give the answers of both ...
September 3, 2011 by DD

Chemistry
Hydrogen fluoride is used in the manufacture of Freons (which destroy ozone in the stratosphere) and in the production of aluminum metal. It is prepared by the reaction below. CaF2 + H2SO4 CaSO4 + 2 HF In one process 9.00 kg of CaF2 are treated with an excess of H2SO4 and ...
August 7, 2012 by Shawn

chemistry
A 211 g sample of barium carbonate, BaCO3, reacts with a solution of nitric acid to give bar- ium nitrate, carbon dioxide and water. If the acid is present in excess, what mass and volume of dry carbon dioxide gas at STP will be produced
May 14, 2013 by myrtle

Chemistry
The chemical reaction of 100 g of salicylic acid, C7H6O3, with excess acetic anhydride produces 50.0 g of aspirin, C9H8O4, according to the equation. What is the percentage yield for the reaction shown below? Please show your work. C7H6O3+C4H6O3→C9H8O4+C2H4O2
March 31, 2014 by Kayla

chemistry clearly step by step
Al2(s04)3 solution of 1 molal concentration is present in 1 litre solution of 2.684g/cc.How many moles of bas04 would be precipitation on adding bacl2 in excess? The answer 6M I do not understand pls explain step by step Thank a lot all tutors
July 20, 2014 by Ken

Biology
Need help with these two: PLEASE help me; this is like the 4th time I'm posting this. 26. Why do plant cells contain both choroplasts and mitochondria? a. in the light, plants are photosynthetic autotrophs. In the dark, they are heterotrophs. b. if plants can't produce enough ...
January 25, 2010 by mysterychicken

biology
Why is a large surface area : volume ratio needed for cells to function properly? a.Adequate surface area (plasma membrane) is needed to furnish nutrients to and expel wastes from the volume (cytoplasm). b. Smaller volumes reduce and larger surface areas reduce the cell's ...
September 30, 2009 by CHARLOTTE

chemistry
Ammonia, NH3, for fertilixer is made by causing hydrogen and nitrogen to react at high temperature and pressure. How many moles of ammonia can be made from 0.15 moles of nitrogen gas?
April 18, 2011 by chelsea

science
hydrogen and oxygen combine in the ratio of 1:8 by mass to form water.what mass of oxygen gas would be required to react completely with 3grams of hydrogen gas?
November 22, 2011 by sai

Chemistry
A 2.7 M solution of phosphoric acid (H3PO4) is to be reacted with a 7.5 M solution of sodium hydroxide to make sodium phosphate and water. How many L of the H3PO4 solution will react with 0.662 L of the NaOH solution
April 25, 2012 by John

Chemistry
At a certain temperature, the equilibrium constant, Kc, for this reaction is 53.3. H2(g)+I2(g) <-> 2HI(g) At this temperature, 0.300 mol of H2 and 0.300 mol of I2 were placed in a 1.00-L container to react. What concentration of HI is present at equilibrium?
March 25, 2013 by Anonymous

HELP! CHEMISTRY
Which one of the following species will react with Sn at standard state conditions? a) S b) Ag+ c) Cu d) Zn2+ What does it mean by standard state conditions? And what do I have to look at to determine it? Would it be Zn2+?
May 8, 2013 by scilover

Chemistry
Express each quantity as a mass in grams. a) 3.70mol of H2O b) 8.43 x 10^23 molecules of PbO2
October 20, 2007 by Marty

chemistry
Using calories, how much heat will 32 grams of water absorb when it is heated from 25 C to 80 C?
February 5, 2008 by chelsea

Chemistry
How many moles of Carbon dioxide are produced from the decompostion of 1.45 grams of Aluminum Carbonate?
February 24, 2008 by Barb

Chem Also Urgent!
How do I determine the number of grams for the following substance: 2.40 mol O2?
February 26, 2008 by Lisa

Chemistry
4 NH3 + 5 O2 --> 4 NO + 6 H2O. How many grams of O2 are required to product 90 g of NO? Please assist in solving.
July 24, 2008 by Amber

basic chem lab question
what is the mass of a typical 50 ml glass beaker in grams
September 21, 2008 by al

chemistry/math
If aluminum has a density of 2.78 g/ml, how much space would 32 grams occupy?
September 29, 2008 by Michelle

Chemistry
Calculate the heat released when 25.0 grams of water freezes at 0 degrees celsius.
December 28, 2008 by Completely Lost

chem
find the density of a cube if it has a mass of 2 grams and has a length of i centimeter on each edge/
January 9, 2009 by tonya

chemistry
how many grams of solid NaOH are required to prepare 200.0 mL of a .050 M solution?
September 1, 2009 by mariah

chemist ry
if 500 g of KCLO3 decomposes and produces 303 g of KCL, how many grams of O2 are produced?
November 7, 2009 by barbie

science
For the reaction 2Na(s) + Cl(g) 2NaCl(s), how many grams of NaCl could be produced from 103.0 g of Na and 13.0 L of Cl (at STP)?
November 13, 2009 by Ethan

chemistry
For the reaction 2Na(s) + Cl(g) 2NaCl(s), how many grams of NaCl could be produced from 103.0 g of Na and 13.0 L of Cl (at STP)?
December 1, 2009 by cr

Chemistry
Estimate the solubility of lead (ll) chloride in grams per liter. ksp= 1.7 x 10^-5
December 10, 2009 by Donna

Chemistry
what is the density of an unknown substance whose mass is 4.5 grams and volume is 5 mil?
January 8, 2010 by Gary

science
N2 + 3H2 --> 2NH3 how many grams of ammonia are made if you have 15.00 g of both N2 and H2 present?
January 10, 2010 by Laur

Chemistry
Approximately how many grams of NaNo3 will dissolve in 100g of water at 20 degrees Celsius?
January 28, 2010 by Lily

chemistry
What will be the mass in grams of hydrogen atoms (only) that will be present in 22.2 g of compound A (XH3)?
February 1, 2010 by richard

Organic chemistry
How many grams of water would it take to quench 1 g of phenylmagnesium bromide?
February 12, 2010 by Chem

chem help
how many grams of carbon contains the same number of atoms as 40g of Neon
February 25, 2010 by Ernesine

chemistry
grams of sodium chloride dissolved in 100mL of water at 20 degrees celcius
March 16, 2010 by ace2

science
suppose 35 grams of waterare cooled from 15 c to 10 c how much heat is given off?
April 15, 2010 by Roselyn

adult education
How many grams of KOH would be necessary to make 200 mL of a 0.15 M solution?
April 23, 2010 by debbie

chemistry
you have 2.0 grams of water at 0 degrees Celcius. how many kilojules of heat will freez it?
April 30, 2010 by Anonymous

chemistry
what is the number of calories of heat energy released when 25 grams of water is cooled from 20 C to 10 C?
March 2, 2011 by Anonymous

chem
how much pressure does 35 grams of carbon dioxide at 400 kelvin exert?
May 9, 2010 by pat

Chemistry
How many grams of lithium nitrate, LiNO3, are required to prepare 3.00 102 mL of 2.00 101 M solution?
May 12, 2010 by Chris

chemistry
1. How many joules of energy must be absorbed to raise the temperature of 20 grams of water from 25C to 30C?
May 21, 2010 by ana

chemistry
what is the molarity of 20 grams of HCI mixed with water to make 1 liter of solution
June 7, 2010 by jhjmjj

chemistry
how many grams of NaOH are contained in 250 mL of a 400 M sodium hydroxide solution
July 14, 2010 by kelly

Chemistry
What mass of chloral hydrate (C2H3Cl3O2) would contain 1.0 grams of chlorine?
August 16, 2010 by Anonymous

Chemistry
If 100.0 J are added to 20.0 grams of water at 30.0 degrees Celsius. What will be the final temperature?
September 27, 2010 by Kris

Chemistry
If 100.0 J are added to 20.0 grams of water at 30.0 degrees Celsius. What will be the final temperature?
September 27, 2010 by Kris

chemistry
Calculate the mass of KI in grams required to prepare 7.00 multiplied by 102 mL of a 2.60 M solution
October 12, 2010 by Anonymous

Chemistry
How many grams of KCl would be formed in the reaction of 3.000 g of K2CO3 and HCl?
October 17, 2010 by Amber

Chemistry
Calculate the number of molecules in 3.1466x10^1 grams of sulfur dioxide, SO2
October 22, 2010 by HELP

Chemistry
Calculate the number of molecules in 3.1466x10^1 grams of sulfur dioxide, SO2
October 22, 2010 by HELP

chem
how many milliliters of .242 m of NaOH are required to exactly titrate 18.0 grams of H2C2O4
October 27, 2010 by Anonymous

Physics
How much heat is gained or lost when 200 grams of ice melts?
October 28, 2010 by John

Physics
How many calories of heat are gained to turn 10 grams of ice at 0 C into water at 0 C?
November 1, 2010 by Amanda

Chemistry
How many liters of CO2 would be produced if 32 grams of CH4 are combined with oxygen?
November 9, 2010 by Renee

Chemistry 110
How many grams of Au2S can be obtained from 1017 mol of Au? The answer is 249. How did they get that?
November 17, 2010 by Kim K

Chemistry
How much heat is given off by melting 155 grams of water?
November 18, 2010 by Sarah

physical science
An object has a length of 5.0 cm, a height of 3.0 cm and a width of 15.0 cm. It has a mass of 24 grams. What is its density?
November 23, 2010 by t.o

Med lab tech
how many grams of KCL are required to make 5.0ml of a 35% w/v solution?
November 27, 2010 by billie

chemistry
How many grams of methane gas were used to fill a baloon to a volume of 3.0 L at STP?
December 5, 2010 by Naples

9th grade
a object has a mass of 30 grams and a volume of10 cm^3. what is the density of the material?
December 8, 2010 by ceeceee

10th grade
How many grams of water vapor (H2O) are in a 10.2 liter sample at 0.98 atmospheres and 26C?
December 20, 2010 by jeremy

chemistry
what is the concentration of NaCl if 10 grams are dissolved in enough water to make 12 liters?
January 18, 2011 by jemmie

chemistry
How many grams of: 1.MgO 2.Cas would be produced if I had 3.8 moles of CaO
January 18, 2011 by Jovanni

Chemistry
how to figure The grams of protein in 1 cup of soup that has 98 {\rm Cal} with 6 {\rm g} of fat and 8 {\rm g} of carbohydrate
February 7, 2011 by Jen

Survey of the sciences
Show that one mole of sugar equals 342 grams.
February 9, 2011 by Stephanie

college chem
Calculate the Mole Fraction of benzene in toluene if there are 5 grams of each in the mixture
February 10, 2011 by shelby

chemistry
How many grams of Lead (II) Nitrate are required to make a 350mL solution of 2.5M Pb2+?-
February 20, 2011 by valentina

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