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February 24, 2017

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: 23,046

Chemistry
0.573 g of calcium chloride reacts with excess of 0.5 M Na3PO4 to form .523 g of isolated calcium phosphate precipitate. Determine theoretical yield, actual yield, and percent yield for this reaction.
March 26, 2016 by Kiana

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

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

Chemistry
How much water would be formed if 3.00 mol NH3 reacted with excess oxygen gas in the following equation? Given the reaction 4NH3+ 5O2 --> 4NO + 6H2O A) 2.00 mol B) 3.00 mol C) 4.50 mol D) 6.00 mol E) None of these
April 9, 2016 by Petey

Chemistry!! Please Help!
What mass of propanoic acid, CH3CH2COOH, pKa= 4.87, should be dissolved in water to 2.00L volume in order to produce a pH of 2.50? THANKS! -J
February 12, 2009 by Jude

Chemistry! Please Help!
What mass of propanoic acid, CH3CH2COOH, pKa= 4.87, should be dissolved in water to 2.00L volume in order to produce a pH of 2.50? THANKS! -J
February 12, 2009 by Jude

physics
10. How much current is required to produce a force of 0.96 N on a 75 cm long wire oriented at right angles to a 0.24 T magnetic field? A. 0.050 A B. 0.17 A C. 5.3 A D. 0.19 A 5.3 A (<--- (0.96)/((75.0e-2)*(0.24)) )
May 24, 2009 by sally

chemistry
What volume of ethylene glycol (C2H6O2), a nonelectrolyte, must be added to 13.7 L of water to produce an antifreeze solution with a freezing point of -30.0¡ÆC?
November 23, 2009 by yutyh

geology
Approximately how many tons of lignite would be required to produce the amount of heat generated by one ton of anthracite coal?
January 18, 2010 by Jen

Chemistry
Between which two orbits of the Bohr hydrogen atom must an electron fall to produce light of wavelength 434.2 ?
September 27, 2010 by Kyle

physics
Between which two orbits of the Bohr hydrogen atom must an electron fall to produce light of wavelength 434.2 ?
September 27, 2010 by Kyle

physics
calculate the horizontal force that must be applied to produce an acceleration of 1 g for 1 kg. puck on a horizantal frictiom-free air table.
December 12, 2010 by Anonymous

physics
Five forces act on an object: (1) 60.0 N at 90°, (2) 40 N at 0°, (3) 80 N at 270°, (4) 40 N at 180°, (5) 50 N at 60°. What are the magnitude and direction of a sixth force that would produce equilibrium
March 14, 2011 by jon

math
arrange the digits 1-9 by inserting plus or minus signs using each ditit only once to produce a total of 200
March 15, 2011 by bg

Integrated Physics and Chemistry
Energy that is dissipated during heat flow cannot usually be used to produce work. True False
May 3, 2011 by jessica

chemistry
the average molar mass of polyethylene when 4.40 g of the polymer is dissolved in benzene to produce 200.0 mL of solution and the osmotic pressure is found to be ...
April 2, 2012 by Anonymous

macroeconomics
1. Which of the following is least likely to affect an economy's capacity to produce? A. Technology B. Capital C. Labor D. Government purchases E. Education
April 17, 2012 by michael

Chem
How long must a current of 1.20 A pass through a sulfuric acid solution in order to produce 25.0 mL of H2 gs at 25 degrees C and 1 atm pressure?
July 18, 2012 by Josh

Chemistry
How much water must be added to 482. mL of 0.201 M HCl to produce a 0.147 M solution? (Assume that the volumes are additive.)
December 2, 2012 by Lailah

Physics- Help
Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 75 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?
December 3, 2012 by Mat

Physics- Help
Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 75 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?
December 3, 2012 by Mat

Physics- Help
Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 75 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?
December 3, 2012 by Mat

Physics
Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 83 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?
December 15, 2012 by Lexie

chemistry
What mass of sodium carbonate must be used to produce 10.36L of carbon dioxideat 24°C and 103kPa aaccording to neutralization reaction.
December 28, 2012 by Raina

science
you read about a rope and pulley machine that was able to produce equal amounts of output work. was this a realistic example why or why not?
January 13, 2013 by ricardo

science
you read about a rope and pulley machine that was able to produce equal amounts of output work. was this a realistic example why or why not?
January 13, 2013 by ricardo

physics
what frequency and period would be required for sally and her hard-working partner to produce a standing wave with three nodes?
February 11, 2013 by Anonymous

chemistry
How much water must be added to 440. mL of 0.204 M HCl to produce a 0.139 M solution? (Assume that the volumes are additive.)
April 4, 2013 by mary

Chemistry
You are given the following decomposition reaction of ammonia NH3 ---> H2 + N3 unbalanced When you decompose 12.0g of NH3you produce 1.87 g of H2 Calculate the percent yield of H2
April 18, 2013 by Johny

physics
Five forces act on an object. (1) 57 N at 90° (2) 40 N at 0° (3) 77 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?
February 11, 2014 by Khadija

chemistry first year
20L of N2 and 100 L of H2 are reacted to produce NH3 what is the decrease in the V of the mixture N2+3H2--> 2NH3 Ans me with reason
April 19, 2014 by gulzara

Calculus
400 feet of fencing is to be used to enclose four adjacent pieces of land. What dimensions will produce the largest area?
October 25, 2014 by Rick

Chemistry
What is the minimum amount of 6.0M H2SO4 necessary to produce 19.0g of H2(g) according to the reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g)
November 14, 2014 by Jordan

Chemistry
A chemical company claims that they are able to produce a certain product through thermodynamically favored process. Explain how this is possible?
January 29, 2015 by Anonymous

chemistry
what mass of zinc dissolved in dilute HCL will produce 0.15g of hydrogen ? can you explain the steps to sloving this question please
April 15, 2015 by precious

Chemistry
The number of moles of cl2 produce will be ??????? If one mole of pcl5 is heated at 250 in a vessel having a capacity of 10dm³.
October 19, 2016 by Nabiha

Chemistry
For the reaction HCl + NaOH → NaCl + H2O, how many moles of hydrochloric acid are required to produce 281.0 g of water?
October 31, 2016 by Andrew

Chemistry
In a lab, we added NH3(aq) to CuSO4(aq), and the solution turned dark blue with a precipitate. The problem is that the products ( Cu(NH3)4 and SO4) should be soluble, no? The question is then, what is the percipitate? The ppt is Cu(OH)2. The dark blue solution is Cu(NH3)42+ ...
December 17, 2006 by Karl

Economics
5. (Ch. 17 # 5) Sparkle is one firm of many in the market for toothpaste, which is in long-run equilibrium. a. Draw a diagram showing Sparkle’s demand curve, marginal revenue curve, average cost curve, and marginal cost curve. Label Sparkle’s profit-maximizing output and ...
April 8, 2007 by Amanda

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

Physics 11
I need help on this question 79 g of water at 95 degree Celsius were added to tap water at 22 degree Celsius, and the Temperature of the mixture after all thermal energy transfer ended at 36 degree Celsius. What was the mass of the tap water? (teacher's answer key : 412 grams...
November 16, 2009 by Andrew

Pre calculus
A 100 foot tall antenna sits part way up a hill. The hill makes an angle to 12 degrees with the horizontal. In other words, if you were going to walk up the hill, you would walk at an angle of 12 degrees. To keep the antenna stable, it must be anchored by 2 cables.The distance...
April 18, 2016 by Ram

Bio
A biologist was experimenting with a corn plant that had previously incorporated radioactive carbon into starch stored in its cells. She measured the radioactivity present in the following compounds: Sugar extracted from the plant CO2 producd by the plant Alcohol, if produced ...
November 19, 2009 by Trishia

Chemistry
You have a 250ml solution of 0.13M calcium iodate. How many grams of potassium iodate need to be added to the solution to begin to precipitate calcium iodate? The solubility product constant for calcium iodate is6.47 *10^-6. B) you have a 250ml solution of 0.13 M calcium ...
November 14, 2015 by Jack

chemistry
You have a 250ml solution of 0.13M calcium iodate. How many grams of potassium iodate need to be added to the solution to begin to precipitate calcium iodate? The solubility product constant for calcium iodate is6.47 *10^-6. B) you have a 250ml solution of 0.13 M calcium ...
November 18, 2015 by anonymous

math
Graph the following equations; calculate the slope, x-intercept, and y-intercept, and label the intercepts on the graph. 1. A temperature of 41 degrees F is equivalent to 278.2 degrees K, while a temperature of 86 degrees F is equivalent to 303.2 degrees K. Find the equation ...
July 16, 2007 by lisa

chemistry
Two solutions were prepared. The first was a 0.672 M solution of aluminum hydroxide and the second was a 0.405 M sulfuric acid solution. 1.) If a total of 500 mL of aluminum hydroxide solution was prepared, how many grams of the solute (AL(OH)3) would have been weighed out in ...
May 7, 2014 by Jordan

Stastistics
The effect of a drug to change in heart beat by 5 beats per minute over 48 hours in either direction. A two sided test conducted at the 0,05 level of significance will be used. What sample size is needed for this study. The mean for the population u = 75 beats per minute STD...
February 25, 2016 by Ramon

math
this problem is given me very much difficulty because of the set up and what to do. can someone assit me if you have a few minutes. thanks. Income. A baker has 250 units of flour, 90 of sugar, and 150 of raisins. A loaf of raisin bread requires 1 unit of flour, 1 of sugar, and...
June 14, 2007 by student

applying stoichiometry
10.0 g aluminum reacts with 66.5g bromine to form 65.0g aluminum bromide. determine the limiting reactant and calculate the theoretical and percent yield. once the reaction has occured as completely as possible, what mass of the excess reactant is left?
February 5, 2012 by danielle

Chemistry
What mass of silver chloride, AgCl will precipitate from a solution that contains 1.50 g of, calcium chloride, CaCl if an excess amount of silver nitrate is present? CaCl2 + 2AgNO3 --> 2AgCl+ Ca(NO3)2 I keep getting 5!but its wrong...right?
January 23, 2013 by Deepa

Physics ...
Can anyone help me to calculate the energy released when 7Li and a deuteron (d) fuse to form 9Be, Given only mass excess 7Li 16004 uu, d 14102 uu , and 9Be 12182 uu uu might be microunit perhaps ??? Thank you explanation would be good thanks
August 26, 2013 by Dino

Physics ...
Can anyone help me to calculate the energy released when 7Li and a deuteron (d) fuse to form 9Be, Given only mass excess 7Li 16004 uu, d 14102 uu , and 9Be 12182 uu uu might be microunit perhaps ??? Thank you explanation would be good thanks
August 26, 2013 by Dino

Physics ...
Can anyone help me to calculate the energy released when 7Li and a deuteron (d) fuse to form 9Be, Given only mass excess 7Li 16004 uu, d 14102 uu , and 9Be 12182 uu uu might be microunit perhaps ??? Thank you explanation would be good thanks
August 26, 2013 by Dino

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

math
3/14 of 10/9 Help needed ASAP
January 27, 2017 by azaiah

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

Algebra II
Hat size are determined by the measuring the circumference of the head in either inches or centimeters. Use ratio and proportion to complete the following table. Hat size head circum head circum (~1/2 inch) (~centimeter) 7 3/8 23 1/5 59 ? 22 4/5 ? (For the first answer box ...
October 13, 2010 by Daniel

chemistry
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 190 mL of distilled water and finds the water level rises to ...
September 7, 2009 by abbey

chem
I am still having a little problem with my original question. However, this is what I have done so far. I am not sure what to do with the density of the solution of 0.78 g/mL. The answer I came up with is 5.47 mol/kg. I found the density of the water in grams then I converted ...
February 13, 2011 by paula

Chemistry
Given the chemical reaction: N2+3H2--->2NH3 If 20 molecules of nitrogen react with 30 molecules of hydrogen to from ammonia, what is the total number of molecules present after the reaction goes to completion?
October 31, 2008 by Songyi

chemistry
For the reaction below, Kp = 1.16 at 800.°C. CaCO3(s) CaO(s) + CO2(g) If a 21.7-g sample of CaCO3 is put into a 10.6 L container and heated to 800°C, what percentage by mass of the CaCO3 will react to reach equilibrium?
February 3, 2013 by gina

chemistry
For the reaction below, Kp = 1.16 at 800.°C. CaCO3(s) CaO(s) + CO2(g) If a 21.7-g sample of CaCO3 is put into a 10.6 L container and heated to 800°C, what percentage by mass of the CaCO3 will react to reach equilibrium?
February 3, 2013 by gina

STATS Math
Suppose a simple random sample of size n=150 is obtained from a population whose size is N=20,000 and whose population proportion with a specified characteristic is p=0.8. Please answer questions (1) through (5) below. (1) describe the sampling ditriribution of p^ (choose the ...
November 26, 2014 by LADO

chemistry
Determine the number of bromide ions in solution when 4.23 g of magnesium bromide and 1.21 g of potassium bromide are dissolved in 120mL of water. Please explain not sure how to even start this problem, thanks! chemistry - DrBob222, Wednesday, December 8, 2010 at 7:57pm ...
December 8, 2010 by Stacy

geometry
1. What is the lateral surface area of a square pyramid with side length 11.2 cm and slant height 20 cm? 224 cm2 448 cm2 896 cm2 2508.8 cm2 2. What is the lateral surface area of a cone with radius 19 cm and slant height 11 cm? 19 cm2 30 cm2 200 cm2 209 cm2 3. What is the ...
April 18, 2012 by lilman

chemistry
C6H12O6(s) +6CO2(g) +6H2O9g) 1) given 2 moles of glucose and 14 moles of O2, how many moles of CO2 could be produced? 2) which is the limiting reactant ? 3) how many moles of the excess reactant remain?
May 23, 2010 by Mickey

chemistry
If the reaction below proceeds with a 96.8% yield, how many kilograms of CaSO4 are formed when 5.97 kg SO2 reacts with an excess of CaCO3 and O2? 2 CaCO3(s) + 2 SO2(g) + O2(g) 2 CaSO4(g) + 2 CO2(g)
April 7, 2011 by za

Chemistry
For the following reaction: Al2(SO4)3 + 6NaOH = 2Al(OH)3 + 3Na2SO4 How many moles of Na2SO4 can be made with 3.2 moles of NaOH and excess Al2(SO4)3?
November 14, 2011 by Carrie

Chemistry ( HELP PLEASE!!! )
Consider the reaction H3PO4+ 3NaOH→Na3PO4+ 3H2O. How much Na3PO4 can be prepared by the reaction of 3.43 of H3PO4 with an excess of NaOH?
March 13, 2015 by Farrell

physics
A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 8000 N/C. The mass of the water drop is 3.54 10-9 kg How many excess electrons or protons reside on the drop?
January 8, 2011 by michelle

Physics
A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 8380 N/C. The mass of the water drop is 3.40 10-9 kg. How many excess electrons or protons reside on the drop?
March 29, 2011 by Anonymous

chemistry
the chlorine in a 0.12g sample of 95% pure magnesium chloride is to be precipitated as silver chloride, calculate the volume of 0.100m of silver nitrate solution required to precipitate the chloride and give a 100% excess.
July 7, 2011 by julius

physics
A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 12300 N/C. The mass of the water drop is 4.71 × 10-9 kg. How many excess electrons or protons reside on the drop?
February 25, 2013 by natasha

chemistry
Assume that 50ml of 0.01M edta solution were added to 25ml of co solution and the excess edta required 20ml of 0.005M mg solution. Calculate ppm co+ present. The answer 942ppm Bob helps me
March 2, 2013 by Fai

Chemistry
Could someone please walk me through how to solve this problem: A sample that is 63.9 % chloride by mass is dissolved in water and treated with an excess of AgNO3. If the mass of the AgCl precipitate is 1.045g, what was the mass of the original sample?
October 6, 2015 by Ashley

Chemistry - Heat Calculations
Calculate the heat released when 4 L Cl2 with a density of 2.46 g/L at 25 degrees C reacts with an excess of sodium to form solid sodium chloride at 25 degrees C.
April 19, 2010 by Akira

chemistry
A .500 g sample of impure CaO (a solid) is added to 50.0 mL of 0.100 M HCl. The excess HCl is titrated by 5.00 mL of .125 M NaOH. What is the percentage of CaO in the sample?
May 9, 2012 by b

chemistry
a 5 g mixture of natural gas containing ch4 and c2h4 was burnt in excess of oxygen yielding 14.5 g of co2 and h2o.What is the weight of ch4 and co2 in the mixture
July 25, 2013 by sim

chemistry
Calculate the theoretical yield of alum if 0.200g of Aluminum was reacted with excess KOH and H2SO4? I don't even know how to start it. Please help. Also I wanted to say thank you for the help I've gotten from this website it has helped me a lot. I feel like I'm understanding ...
October 16, 2014 by Luis

chemistry
Potassium permanganate reacts with sulfuric acid as per the equation shown below. Indicate the excess reactant after the reaction of 7.60 g KMnO4 and 10.32 g H2SO4. 4 KMnO4 (aq) + 6H2SO4 (aq) + 2K2SO4 (aq) + 4MnSO4 (aq)+ 6H2) (l) + 5O2 (g) I have no idea where to start or what...
September 19, 2009 by Some kid

Chemistry
When 0.250 mol of CH4(g) reacts with excess Cl2(g) at constant pressure according to the chemical equation shown below, 177 kJ of heat are released. Calculate the value of Delta H for this reaction, as written. 2CH4(g)+3Cl2(g)-->2CHCl3(l)+3H2(g) delta H=?
March 18, 2010 by Daqa

Chemistry
1. Which element would react more actively when placed in water to form strong base? A. Potassium B. Magnesium C. Fluorine D. Oxygen Would it be A? 2. Which transition metal has inner third orbital partially filled? A. Iron B. Gold No ideas on this Thank you.
May 31, 2009 by Anonymous

organic chemistry
compare and contrast the reactivity of the organometallic reagents R2Cd, RLi, R2CuLi, RMgBr, RZnBr with respect to ethyl chloride, ethanoic acid and 2-cyclohexen-1-one im not really sure what its asking and i don't know how they react differently determines their reactivity ...
November 2, 2009 by Lucy

Chemistry
Based on the balanced equation 2NBr3 + 3NaOH → N2 + 3NaBr + 3HOBr calculate the number of NaBr formula units formed when 126 NBr3 molecules and 192 NaOH formula units react?
February 15, 2010 by Josh

chemistry
Nitrogen and hydrogen react to form ammonia. Consider the mixture of N2 and H2 in a closed container as illustrated below. Assuming the reaction goes to completion, draw a representation of the product mixture. Explain how you arrived at this representation.
March 3, 2010 by Mary

Chemistry
Calculate the volume of 1.0 M copper(II) sulfate solution required to completely react with 1.0 g of Fe(s) according to this equation: 2 Fe(s) + 3 Cu^2+ (aq) --> 2 Fe^3+ (aq) + 3 Cu (s). the copper in the reactant has a charge of 2+ and the iron in the product has a charge ...
March 5, 2013 by Sabrina

Language Arts
The narrator of stolen day says his family often laughs at him.How does he react when they do? A.He wishes he were an orphan. B.He dislikes everyone he knows. C.He appreciates the attention. D.He dislikes being teased. My answer is D. can you please check my answer?
October 28, 2016 by I NEED HELP PLEASE!!!

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