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December 19, 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: 18,815

HELPP !!
Copper(I) ions in aqueous solution react with NH3 according to Cu^+ + 2NH3 --> Cu(NH3)2^+ Kf=6.3x10^10 Calculate the solubility (in g/L) of CuBr (Ksp=6.3x10^-9) in 0.81 M NH3.
May 10, 2012 by HELPP !

Chemistry
0.300 moles of bromine gas (Br2) and 0.500 moles of chlorine gas (Cl2) react to for tribromochlorine (Br3Cl). how many moles of this product will form ?
August 11, 2013 by kate

Chemistry-Repost for DrBob222
A sample of C60O3 decomposes with an activation energy of 50 kg/mol, an Arrehnius pre-factor of 2e10 s-1 and a k value of .04 s-1. How long does it take for a 25 mg sample at 25 degrees C to produce 10 mg. Your response was is that C60O<suh>3 or what? And I thought ...
March 21, 2014 by Anonymous

physics
How much paraffin oil would be needed to heat the same volume of water? Heat capacity of water = 4200 j kg-1 K-1 Mass of 1 litre of water = 1kg Heat value of paraffin = 45M J kg-1 Density of paraffin = 800kg m -3 1 cubic centimetre (1cm3 = 10-6 m3) Water ...
December 15, 2010 by Paul

MATHS
A pie is cut into two equal parts. The first part of the pie is shared between Abdul and Kate. Kate has 3 times as much as Abdul. The second part of the pie is shared between Sarah and Ron. Ron has 3/5 as much as Sarah. The mass of Sarah's share of the pie is 200 grams. What ...
November 7, 2013 by LARA

CHemistry
The first step of the synthesis is described by the reaction below. When 1.200 g of Fe(NH4)2(SO4)2 6H2O is mixed with 13 mL of 1.0 M H2C2O4, the theoretical yield of FeC2O42H2O is ? grams im not sure what to do. do u convert 1.0M to grams first? by multiplying .013 L thx First...
April 22, 2007 by Jason

AP Chemistry
My objective is to find the molar mass of a gas. Is this the correct balanced equation for magnesium ribbon reacting with hydrochloric acid to form hydrogen gas? 2Mg (s) + 2HCL (l) ----> H2 (g) + 2MgCl (aq) Also, I'm required to find the mass of the magnesium ribbon in ...
September 23, 2007 by Jake

english
3. In The Pigman & Me, the author creates a mood of suspense by focusing most of the action around a fight between two boys at school. a tree cut almost to its heart. Nonno Frankies advice to Paul. concerns about how a girl will react.
November 17, 2014 by robert

Chemistry
Even if you can help answer one that would be a great help! 1. How many liters of NO(g) are produced when 0.85L of 2.00M HNO3 solution is added to 216g according to the equation. Which reactant is the limiting reactant? 3 Ag + 4 HNO3 -> 3 AgNO3 + NO + 2 H2O3 2. Calculate ...
October 20, 2013 by P.

Chem
a 0.2000 grams sample of aluminum metal is added to a solution containing 1.0000grams of an unknown compound made of platinum and chloride ion. the reaction results in the formation of aluminum chloride and platinum metal. when the reaction is complete, unreacted aluminum ...
March 1, 2014 by Carley

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 x 10^6 kg/s, what is the rise in temperature of the flowing water?
December 4, 2010 by Stefan

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 delta H for this reaction is a) 91.3 kJ b) 120 kJ c) 202 kJ d) 7.50 kJ I ...
January 23, 2012 by Walter

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 delta H for this reaction is a) 91.3 kJ b) 120 kJ c) 202 kJ d) 7.50 kJ I ...
January 23, 2012 by Walter

chemistry
Q3: In the combustion reaction of 149g of propane(C3H8) with excess oxygen, what volume of carbon dioxide(CO2) is produced at STP? (note: balance the reaction first) C3H8 + O2  3CO2 + H2O
December 8, 2013 by b

chemistry
CaCO3(s) + 2 HCl(aq) --> CaCl3(aq) + H2O(l) + CO2 It takes 19.26 mL of 0.6721 M HCl to completely react with the CaCO3. What is the mass of CaCO3 in the tablet? didnt mean to cal you
November 11, 2012 by Sheree'

Algebra I
In planning for a new item, a manufacturer assumes that the 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 itmes will cost $10,000 to produce and that 300 items will cost $22,000 to ...
August 21, 2007 by Katie

Chemistry
You weigh out 1.60 g of sodium carbonate monohydrate, dissolve it in water and react it with 15.00 mL of 2.00 M HCl. Write an equation for the reaction and calculate the expected mass or carbon dioxide that will be produced. Your answer should be a decimal number to 3 decimal ...
September 23, 2012 by Sarah

statistics
Suppose that there are 10 million workers in Canada and South Korea and each worker in Canada and South Korea can produce 4 cars per year. A Canadian worker can produce 10 tonnes of grain a year, whereas a South Korean worker can produce 5 tonnes of grain a year. The following...
November 11, 2011 by cheryl

MACROECONOMICS
Suppose that there are 10 million workers in Canada and South Korea and each worker in Canada and South Korea can produce 4 cars per year. A Canadian worker can produce 10 tonnes of grain a year, whereas a South Korean worker can produce 5 tonnes of grain a year. The following...
November 13, 2011 by cheryl

chemistry
a candle was 27.9 grams. the mass of the candle that burned in 3 minutes was 7.2 grams. a) How many moles of wax were in the candle before it burned ? b) How many molecules are in the candle before it burned? c) How many moles of wax were used up during the burning? d) How ...
May 17, 2012 by auburn

Chemistry
A reaction mixture of 4.0 mL of 0.002 M SCN- and 5.0 mL of 0.002 M Fe3+ is diluted to 10.0 mL with 0.1 M HNO3 to form the blood-red FeNCS2+ complex. The equilibrium molar concentration of the FeNCS2+ determined from a standardization curve is 1.5x10^-4 mol/L. Calculate, in ...
March 18, 2013 by Anonymous

math
1. Elizabeth planned to make 6 pans of apple crisp for the day, using extra tart granny smith apples-just like her grandmother had. But after peeling, coring, and slicing she had a major problem: she only had 10 cups of apple slices. it was getting late and she needed to get ...
June 22, 2014 by kgk

Science/Math
We have 30 grams of clay. We understand that Density=Mass/Volume. We understand that the Density of water is 1.0 and in order for the clay boat to float in the water Density needs to be less than 1.0. So my question is using 30 grams of clay what design will allow me to hold ...
April 24, 2011 by Paul

Scientic Notation
A family refers to a group of two or more people related by birth, marriage, or adoption who reside together. In 2000, in Country A, the average family net worth was 430,000 and there were about 9.2 x 10 to the seventh power families. Calculate the total family net worth in ...
May 19, 2013 by Anonymous

Accounting
It's approaching year-end, and your president has asked you, the management accountant, to visit his office for a heart-to-heart talk. After he closes the door, he tells you that profits for the year will end up below plan and that he's disappointed. He had just returned from ...
July 19, 2010 by Anonymous

chemistry check 2
I know you've read this question too many times already but I just want to make sure I did the last part (Ksp) correctly. 50.0 ml of a 0.0500 M solution of lead (II) nitrate is mixed with 40.0 ml of a 0.200 M solution of sodium iodate at 25C. Calculate the Pb2+ and IO3- ...
May 17, 2007 by mel

chemistry 101
calculate the molecules of oxygen required to react with 28.4g of sulfur in the following reaction? a)1.60 * 10 **24 molecules b)3.56 * 10**23 molecules c)2.67 * 10**23 molecules d)5.33 * 10**23 molecules e)8.00 * 10**23 molecules
November 24, 2009 by yalda

Chemistry help needed
How do I prepare 90% formic acid from conc. formic acid (98%-100% of density 1.22g/ml)? Please help me check if my calculations are correct. Assuming conc. formic acid is 99%, 0.99 X 1.22 = 1.2078 Add 1.2078 / 9 = 0.1342ml H2O to 1ml of conc. acid to have a solution that is 90...
December 17, 2008 by tricia

Organic Chemistry
Hi, can you please help me with these questions. Methane and chlorine react when irradiated with UV light. Explain why the reaction requires only a little flash of UV light rather than prolonged radiation. Explain each of these observations as fully as you can. 1.
July 26, 2006 by Ishani

chemistry
What volume (in Liters) of hydrogen must react to form 17.0L of ammonia according to the following balanced equation: N2(g) + 3H2(g) --> 2NH3(g) Ratio from equation is H : NH3 = 3 : 2 = 3/2 : 1 = 17x3/2 : 17 = 25.5 : 17 17 L of hydrogen can you check my work is this right?
October 17, 2010 by Melissa

chemistry
what volume in Liters of 0.15M KCl solution is required to completely react with 0.150 liter of a 0.175M Pb(NO3)2 solution according to the following balanced equation? 2KCl(aq)+ Pb(NO3)2(aq)-PbCl2(s)+ 2KNO3(aq)
October 26, 2010 by mike

biology grade 12
My teacher wants me to calculate the rate of enzyme activity (1/s) I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees celsius) AND the times 8.74, 18.83, 14.30, 34.22, and infinity (seconds obviously, these are the times it took the enzyme to react) What am i ...
February 27, 2011 by hello

gr. 12 biology
My teacher wants me to calculate the rate of enzyme activity (1/s) I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees celsius) AND the times 8.74, 18.83, 14.30, 34.22, and infinity respectively (seconds obviously, these are the times it took the enzyme to react) ...
February 27, 2011 by paul

gr. 12 biology
My teacher wants me to calculate the rate of enzyme activity (1/s) I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees celsius) AND the times 8.74, 18.83, 14.30, 34.22, and infinity respectively (seconds obviously, these are the times it took the enzyme to react) ...
February 27, 2011 by paul

chem
write an equation for which component of the phosphate buffer (H2PO4-/ HPO4^2-) reacts when HCl is added. Do the same for NaOH. I think that the H2PO4- will react with the NaOH but its only a guess and I'm confused as to how I would go about doing this.
January 29, 2012 by jean

Chemistry
A solution containing 0.100 mol of Na2CO3 and 0.100 mol of NiCl2 is allowed to react. What mass of precipitate forms in this reaction? I just don't understand how to get the answer. Can someone please show me and explain to me how to do this.
February 25, 2013 by Eagertolearn

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

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

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

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

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

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

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

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

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

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

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
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

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

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