Thursday
November 27, 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: 18,661

chemistry
What volume of hcl solution of density 1.2g/cm3 and containing 36.5% by weight hcl, must be allowed to react with zinc in order to liberate 4g of hydrogen The answer 333.3ml Who helps me step by step for me
July 4, 2014 by ken

sociology
Micah is studying child behavior in playgrounds throughout the world. He wants to see how the children react when teachers select the same child to be the first to use each piece of equipment. Which approach is Micah is using?
October 8, 2014 by tyler

chemistry equilibriums
At a certain temperature, 2.00 moles of phosphorus(V) chloride, PCl5, was placed in a 1.0 L vessel and permitted to react as shown: PCl5 (g) <-> PCl3 (g) + Cl2(g) At equilibrium, the container held 0.40 PCl5. What is the numerical value of Kc for the system as written? A...
December 29, 2010 by chem

AP Chemistry
A solution is 1.0M in AgNO3 and Fe(NO3)2.in the electrolysis of this solution using inert electrodes, the voltage is gradually increased. What is the order in which the substances in the solution would plate our or react at the cathode ? Assume that the overvoltage of hydrogen...
March 19, 2014 by chemistinprogress

Chemistry
How can I tell if the following equations produce precipitates or not? 1. HgCl2 (aq) + K2CrO4 (aq) ==> 2. Ba(OH)2 (aq) + NaClO3 (aq) ==> 3. ZnI2 (aq) + CaSO4 (aq) ==> 4. SnCl2 (aq) + MgBr2 (aq) ==>
January 10, 2008 by Cierra

Physics
By how much shoould a pair of light rays from a common source differ in length to produce destructive interference?
March 22, 2008 by Emily

chemistry
what is the balanced chemical equation for aqueous hydrgoen peroxide to produce solid lead (II) sulfate and liquid water?
May 7, 2008 by rachel

science
is life processes a function that a living thing performs to stay alive and produce more of its own kind
May 26, 2009 by annette

chemistry
Can yuo please help balance this equation? Copper (I) sulfide reacts with O2 to produce a coper metal and sulfur dioxide
September 15, 2009 by leann

biology
why do plants produce far more sugar than they need? why do they not stop photosynthesis once immedaite needs are met?
October 11, 2009 by connie

science
How do uneven heating of the planets surface and the coriolis effect work togahter to produce global wind patterns
January 19, 2010 by kayla

Art history
Is it true that renaissance painters used central compositions to produce a more formal setting? I could be wrong.
January 20, 2010 by AL 87

math
Use the digits 9, 8, 7, 6, 5 and 4 each once to make two three-digit numbers that will produce the maximum product when multiplied.
March 7, 2010 by gio

Science-Chem
Sucrose, C12H22O11, is burned to produce carbon dioxide and water. What is the balanced formula and reaction type?
March 8, 2010 by Jacob

Organic Chemistry 1
Write an equation for the reaction of sodium bicarbonate with aqueous sulfuric acid to produce carbon dioxide.
March 17, 2010 by Brianna

chemistry
Suppose you wanted to produce an aqueous solution of = 8.65 by dissolving the following salt KNO2. At what molarity would you use?
March 28, 2010 by sab

chemistry
2NH3+H2SO4---> (NH4)2SO4 Calculate the mass of ammonia required to produce 125g of ammonium sulfate.|:
March 31, 2010 by Tanya

chemistry
Does the application of heat to a substance always produce a chemical change? And give examples to support your answer.can someone help me?
May 3, 2010 by Jackie

chemistry
Does the application of heat to a substance always produce a chemical change? And give examples to support your answer.can someone help me?
May 3, 2010 by Jackie

chemistry
Does the application of heat to a substance always produce a chemical change? And give examples to support your answer.can someone help me?
May 3, 2010 by Jackie

math
240 feet of fencing material is going to be used. What should the dimensions be to produce a maximum enclosed area.
April 28, 2011 by mimi

chemistry
If 1.5 mol of each of the following compounds is completely combusted in oxygen, which one will produce the largest number of moles of H2O and why?
June 21, 2011 by justin

Chemistry
How do you calculate the number of moles of NaOH to add to a liter of 1M NH4CL (pka of NH4+ = 9.25 ) to produce a solution buffering the pH at 8.75 ? thanks
June 29, 2011 by Lauren

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. Thanks to ur helps.
November 2, 2011 by Ethio

science
The message to produce specific protein is carried from the DNA to the ribosome by means of_________. what should i write in the blank?
January 18, 2012 by Jiang

physics
A student tries to produce notes of higher frequency by blowing a trumpet harder Discuss whether he will succeed?
January 29, 2012 by daniel

Chemistry
How much heat (in kilojoules) is evolved or absorbed in the reaction of 3.35 of with enough carbon monoxide to produce iron metal?
December 10, 2012 by LaK

maths-circles
ABCD is a rectangle the line through C perpendicular to AC meets AB produced at X and AD produce at Y . Prove that DBXY are concyclic
March 20, 2013 by anoynomous

chemistry
calculate the amount of Zn(NO3)2 that needs to be added to 724.5 mLs of water to produce a .295 molar solution.
September 10, 2013 by Anonymous

physics
Why does the pitch of the sound produce by blowing over an open end of a bottle change when you have more water in it?
May 6, 2014 by marlene

physics-nuclear reactors
a) Let's assume a nuclear reactor was a completely isolated system, such that no matter particles can escape from it and the only thing that can get out is energy in the form of heat and radiation. If we weigh the whole reactor before switching it on, and again after it has ...
May 8, 2011 by anonymous

physics
Two Bals. of masses mA = 45 grams and mB = 65 grams are suspended as shown. The lighter ball is pulled away to a 66 degree angle with the vertical and released: ----------------------------- /| | - /| | | / | | | 30 cm / | | | mA | | | mA mB - where = 66 degrees, and the ...
April 9, 2013 by SC

religion
Since the imagination of evil encourages us to do real evil, how should we react to accounts from the media or elsewhere about monstrous evil in our neighborhood or elsewhere in the world?
November 26, 2007 by riley

chemistry
Based on the balanced equation C4H8S + 7O2 = 4CO2 + 4H2O + SO2 calculate the number of H2O molecules formed when 39 C4H8S molecules and 287 O2 molecules react?
February 5, 2010 by andy

Chemistry
For the reaction below, Kp = 1.16 at 800.C. CaCO3(s) CaO(s) + CO2(g) If a 25.0-g sample of CaCO3 is put into a 10.2-L container and heated to 800.C, what percent of the CaCO3 will react to reach equilibrium?
May 12, 2012 by Andrew

Chemistry
At a certain temperature, .5 mol of PCl5 was placed in a .25 L vessel and permitted to react as shown PCl5 (g) --> PCl3 (g)+ Cl2 (g) At equilibrium, the container held .1 mol of PCl5. What is the value of "K"?
August 20, 2012 by Alex

chemistry
draw particle diagrams that account for the fact that 2 volumes of nitric oxide gas react with 1 volume of oxygen gas to form 2 volumes of product with no leftover gas
April 5, 2013 by Paula

English - help needed
Posted by annie on Wednesday, October 13, 2010 at 4:29pm. Are the following sentences semantically / gramatically correct? 1)Alert the supervisor to any defective material found. 2)Some equipment have been taken away for inspection. After inspection, ensure that all the ...
October 13, 2010 by annie

Science
Which of the following is an example of bioamplification? A. Too many herbivores in an ecosystem, due to loss of predators. B. An oil spill that destroys all marine life. C. An excess of nitrogen which causes algal cloom on the water's surface. D. High levels of DDt found in ...
December 4, 2009 by Kaled

physics
At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it initially has...
October 14, 2013 by Anonymous

PHYSICS(HELP)
At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it initially has...
October 14, 2013 by Anonymous

Stat 1
A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were 3.087 3.131 3.241 3.241 3.270 3.353 3.400 3.411 3.437 3.477 (a) Construct a 90 percent confidence interval for the true mean weight. (...
October 20, 2010 by sam

math,correction
The problem states: In planning for a new item, a manufacturer assumes that hte number of items produced X and the cost in dollars C of producing these items are related by a linear equation. Projections are that 100 items will cost $10,000 to produce and that 300 items will ...
January 24, 2007 by Jasmine20

mircoeconomic
Kates Katering provides catered meals, and the catered meals industry is perfectly competitive. Kates machinery costs $100 per day and is the only fixed input. Her variable cost is com-prised of the wages paid to the cooks and the food ingredients. The variable cost ...
November 18, 2008 by gabrielle

Math
Concrete forming tubes are used as molds for cylindrical concrete supports. The volume V of a tube is the product of its length l and the area A of its circular base. You can make 2/3 ft^3 of cement per bag. Write a rule to find the number of bags of cement needed to fill a ...
November 17, 2013 by Anonymous

Algebra
Concrete forming tubes are used as molds for cylindrical concrete supports. The volume V of a tube is the product of its length l and the area A of its circular base. You can make 2/3 ft^3 of cement per bag. Write a rule to find the number of bags of cement needed to fill a ...
November 17, 2013 by Anonymous

Chemistry
4.0 g of ferrous ammonium sulphate, FeS04(NH4)2 SO4 6H20, is used. The oxalate is in excess, calculate the theoretical yield of the iron complex. Can someone please show me how to calculate a question like this please? Thank you
November 2, 2009 by rasuka_geo

Physics
A nuclear power plant has an electrical power output of 1200 MW and operates with an efficiency of 31%. If excess energy is carried away from the plant by a river with a flow rate of 1.0 multiplied by 10^6 kg/s, what is the rise in temperature of the flowing water?
December 3, 2010 by Chelsea

Physics
A nuclear power plant has an electrical power output of 1200 MW and operates with an efficiency of 31%. If excess energy is carried away from the plant by a river with a flow rate of 1.0 multiplied by 10^6 kg/s, what is the rise in temperature of the flowing water?
December 3, 2010 by Chelsea

chemistry
For the reaction Al (s) + 3 HCl (aq) AlCl3 (s) + ₃/₂ H2 (g), it was observed that when 4.00 g of aluminum reacted with excess HCl, exactly 30.0 kJ of heat were released. The DHo for this reaction is a) 91.3 kJ b) 120 kJ c) 202 kJ d) 7.50 kJ no idea please...
January 23, 2012 by Kumar

physics
A nuclear power plant has an electrical power output of 1900 MW and operates with an efficiency of 32%. If excess energy is carried away from the plant by a river with a flow rate of 1.0 106 kg/s, what is the rise in temperature of the flowing water? C
April 29, 2013 by Annette

Chemistry
Water is added to 4.267 grams of UF6. The only products are 3.730 grams of a solid containing only uranium, oxygen and fluorine and 0.970 gram of gas. The gas is 95.0% flourine, and the remainder is hydrogen. From data determine the empirical formula of the gas. What fraction ...
January 9, 2011 by deanna

chemistry
Water is added to 4.267 grams of UF6. The only products are 3.730 grams of a solid containing only uranium, oxygen and fluorine and 0.970 gram of gas. The gas is 95.0% flourine, and the remainder is hydrogen. From data determine the empirical formula of the gas. What fraction...
January 9, 2011 by Deanne

math help needed
if x^3 <x<1/x then x could be equal to 1 6/5 5 1/5
November 22, 2008 by Anonymous

Biology
What is needed for respiration?
December 11, 2008 by Lori

math help needed
Solve for t: 4 6 -- = -- t+3 1-2t
January 20, 2009 by Anonymous

DDP
why was telephone needed?
January 21, 2009 by Anonymous

math help needed
what is 5 percent of 40
April 2, 2012 by liv

maths
2x+5=x+9 urgent help needed
January 3, 2014 by arzam

PHYSICS(PLS HELP)
At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it initially has...
October 14, 2013 by Anonymous

science
what is the mass in grams of 3.00 mol of Mg
October 3, 2007 by student-anon

chem
how do you convert grams to moles
May 29, 2008 by amie

science
6.2 kilograms = ____ grams
September 11, 2008 by TiArA

chemistry
What is the mass in grams of 14.6 amu?
September 15, 2008 by jamie

math
how do you convert ounces to grams
November 30, 2008 by Jameisha

math
how do you convert grams to ounces
November 30, 2008 by Jameisha

pre- algebra
what does grams mean??
December 18, 2008 by Taylor

chemistry
How do I change grams to moles.
January 5, 2009 by Iedane

chemistry
how many moles are in 25.0 grams of potassium?
March 12, 2009 by Anna

Chemistry
How many grams are there in 2.3 10^24 atoms of silver?
May 13, 2009 by Taylor

chems
how many grams of CO will contain 4.10 x 10^12 molecules
November 15, 2009 by Trace

chemistry
how many grams are in 5.2*10^15 atoms of nickel
December 2, 2009 by chance

chemisty
how many grams are in 5.66 mole of of CaCo3
December 16, 2009 by qualesha

chemistry
How many moles are in 52.3 grams of CaSO4?
February 19, 2010 by Jessica

4th grade
14,000kg= how many grams
March 18, 2010 by Anonymous

chemistry
how to find grams from 12 moles
May 5, 2010 by Anonymous

chemistry
What is the mass, in grams, of 3.5710^−2 ?
September 12, 2010 by Alexis

Chemistry
How many molecules are in 2.6 grams of H2O?
September 26, 2010 by Bob

chemistry
how many grams are in 2.4 moles of sulfur?
October 7, 2010 by Alexis L.

chemistry
How many grams equal 6.3 mol of N2?
November 15, 2010 by pinky

ChemIstry
How any grams are there in 3.69 moles of sliver?
November 22, 2010 by Anonymous

Chemistry
How many moles are there in 52.3 grams of nickel
November 22, 2010 by Anonymous

chemistry
How many grams are in one milliliter?
January 23, 2011 by zach

chemistry
how many grams is 6 mole of oxygen?
January 28, 2011 by Anonymous

chemistry
How many grams are there in 2 moles of sodium?
February 8, 2011 by twynna

CHEMISTRY
Grams/mole benzene
February 14, 2011 by dan

chemistry
How many grams of calcium nitrate,
March 10, 2011 by Brianna

chemistry
How many grams are in 2.25 mole of NaBr?
April 3, 2011 by Connie

math
HOW MANY GRAMS OF NH3 CAN BE PRODUCED FROM 15.0 G H2
June 27, 2011 by SHARON

Chemistry
37 grams of Ca(OH)2 in 500 ml of solution is
July 14, 2011 by Colby

chemistry
how to convert from 40.grams to tons
September 8, 2011 by candy44

Chemistry
how many grams of F are in 335 g of CaF2?
September 18, 2011 by Jerry

chem
How many grams are in 3.6 moles of agcl2?
December 15, 2011 by bob

chemistry
What are the total grams of iron
April 16, 2012 by ashley

chemistry
How many molecules are in 25 grams of NH3
June 14, 2012 by moe

chemistry
How many molecules are in 25 grams of NH3
June 14, 2012 by moe

CHEMISTRY
HOW MANY GRAMS OF CALCIUM IS 3.08 MOL OF Ca?
September 9, 2012 by J

Chemistry
what is 39.5 grams of HCl in moles?
September 14, 2012 by Victoria

chemistry
How many moles are in 4.80 grams on SnO2?
November 1, 2012 by Madison

chemistry
how may grams are in 6.1 moles of AIN
November 29, 2012 by Anonymous

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