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August 29, 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: 17,894

Chemistry
How many liters of nitric acid are needed to neutralize 25mL of 4.2M calcium hydroxide?
June 5, 2013 by Anonymous

Chemistry
How many milligram of lysozyme (MW=14,600 g/mol) are needed to make 3 liters of a 10^-6 M solution?
September 15, 2013 by Kris

pe
Describe how balance and/or coordination is needed for at least three things that you do every day.
November 18, 2013 by Anonymous

Math
Solve the equation for the unknown quantity x. Round to the nearest thousandth if needed. 2x=29
December 14, 2013 by Clare

physical science
How much time is needed for a car to accelerate from 8.0 m/s to speed of 22 m/s if the acceleration is 3.0 m/s^2?
January 29, 2014 by Anonymous

chemistry
calculate the heat needed at 0c each of the following joules to freeze 275gof water
January 29, 2014 by delana

Math :-)
Explain why knowing the height is needed when finding the perimeter of a right triangle.
February 9, 2014 by anon

phy113
What mass of ice is needed to cool 60g of water from 43oC to 20oC
March 26, 2014 by sam

Physics 1
What torque is needed to accelerate a 70Kg disk with a 20 cm radius from rest to 10 rad/s?
April 17, 2014 by Sally

world history
what are some songs about Buddhism? They are needed for a school project.
June 1, 2014 by Anonymous

Physics Classical Mechanics
A physical pendulum consists of a disc of radius R and mass m fixed at the end of a rod of mass m and length l . (a) Find the period of the pendulum for small angles of oscillation. Express your answer in terms of m, R, l and acceleration due to gravity g as needed (enter m ...
November 7, 2013 by A

Mathis
Fiona is dissatisfied with her current weekly salary. If she received a raise of $0.50 per hour and worked an additional 4 hours each week her weekly salary would then be $500. What is Fiona current salary a) $380 b)$400 c)$420 d)440 e) not e ought information I put d can you ...
August 21, 2013 by Roger

chemistry
The reaction between 0.0272 g of Mg with an excess of water was carried out in an ice calorimeter. The volume of water decreased by 0.19 mL during the reaction. a) Write the equation that occurs. Is it a redox? b) Calculate the enthalpy of reaction? i have no clue how to ...
November 15, 2009 by edward

chemistry
how do i write a net ionic equation for Lead (II) Nitrate and Sodium Carbonate react to form Lead Carbonate and Sodium Nitrate??
December 11, 2007 by caren

Chemistry
How many moles of hydrogen gas are required to react completely with 807 L of ethylene (C2H4) according to the following reaction at 0oC and 1 atm? hydrogen (g) + ethylene (C2H4) (g)---> ethane (C2H6) (g) Should I use the ideal gas law here?
April 25, 2012 by Mohamed

Chemistry
Calculate the amount of energy released per gram of nuclei when 2 protium nuclei react to form deuterium nucleus (protium = 1.00782 amu, deuterium = 2.01410 amu). The answer in the book is -2.0 x 10^10 J, but I don't have any idea on how to do this. Please help, and thank you ...
March 15, 2014 by Nina

speaking your mind
what is the importance of speaking your mind? It depends on your mindset. Some have power needs, some have attention needs, some have emotional needs to hear themselves, and some have mouths that just seem to be connected to a Duracell battery. One can not make the changes in ...
January 25, 2007 by anonymous

chemistry
If you burn 0.200 g of C(graphite) in an excess of O2 to give CO2, the temperature of the calorimeter, which contains 775 g water, increases from 25.00 degrees C to 27.38 degrees C. The heat capacity of the bomb is 893 J/K. What quantity of heat is evolved per mole of C? C (...
October 30, 2011 by Aubrey

chemistry
A definite amount of NH4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reactant mixture containing excess of naoh was neutralized with 12.5ml of 0.75N nh2s04. Calculate the amount of nh4cl taken. The answer 3.78g who helps
February 10, 2013 by Fai

chemistry
A definite amount of nh4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reactant mixture containing excess of naoh was neutralized with 12.5ml of 0.75N nh2s04. Calculate the amount of nh4cl takedn The answer 3.78g who helps
February 10, 2013 by Fai

Physics
A 60.0 kg runner expends 355 W of power while running a marathon. Assuming that 8.00% of the energy is delivered to the muscle tissue and that the excess energy is primarily removed from the body by sweating, determine the volume of bodily fluid (assume it is water) lost per ...
May 1, 2010 by Kelsey

Electrochem
A baby's spoon with an area of 6.25 cm^2 is plated with silver from AgNO3 using a current of 2.00 A for two hours and 25 minutes. a) If the current efficiency is 82.0%, how many grams of silver are plated? b) What is the thickness of the silver plate formed (d= 10.5 g/cm^3)? I...
May 12, 2007 by Keith

Chemistry
A mixture of C3H8 and C2H2 has a mass of 2.0g . It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.6 times as many moles of CO2 as of water. Find the mass of C2H2 in the original mixture.
October 20, 2012 by Crystal

Chemistry
A mixture of C3H8 and C2H2 has a mass of 2.6g . It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.6 times as many moles of CO2 as of water. Find the mass of C2H2 in the original mixture.
September 28, 2013 by bobert

Chemistry
A mixture of C3H8 and C2H2 has a mass of 2.6g . It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.6 times as many moles of CO2 as of water. Find the mass of C2H2 in the original mixture.
September 28, 2013 by bobert

chemistry
a chemist reacts 8.85g or iron with an excess oh hydrogen chloride to form hydrogen gas and iron(II)chloride.calculate the theoretical yield and the percentage yield of hydrogen if 0.27g H2 are collected
March 7, 2010 by sammy

Chemistry
A mixture of C3H8 and C2H2 has a mass of 2.3g . It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.6 times as many moles of CO2 as of water. What is the mass of C2H2 in the original mixture?
October 19, 2013 by Matt

Finance
Assume a bank has $5 million in deposits and $1 million in vault cash. If the bank holds $1 million in excess reserves and the required reserves ratio is 8 percent, what level of deposits are being held?
October 22, 2013 by Micheal

Chemistry. Percent mass...
A 1.009 g mixture of the solid salts Na2SO4 (molar mass= 142.04) an Pb(No3)2 (molar mass= 331.20) form an aqueous solution with the precipitation of PbSO4 (molar mass= 303.26). The precipitate was filtered and dried and its was was found to be .471 g. The limiting reagent is ...
November 21, 2008 by Sarah

psychology
Could someone please provide help formulating interview questions relating to learning, intelligence, cognition, problem solving, motivation, effects of gender and culture on emotions and personality. This is a great deal of information to try to get from one interview. ...
June 5, 2007 by Anonymous

Chemistry
Sorry to bother again. I'm stuck in these two problems as well. 1. A 27.0 g smaple of an unknown hydrocarbon was burned in excess oxygen to form 88.0 g of carbon dioxide and 27.0 g of water. What iss a possible molecular formula of the hydrocarbon? 2. A sample of CaCO3 was ...
September 9, 2007 by Anonymous

chemistry
Given the thermochemical equation below, calculate the amount of energy released when 250. g of NaOH (molar mass = 40.0 g/mol) reacts with an excess of HCl. Report answer to the correct number of significant figures in units of kilojoules, kJ. NaOH + HCl --> NaCl + H2O ...
April 25, 2013 by sarah

chemistry
A compound was found to be composed of the following amounts of elements: 20.00% wt% C, 26.64wt% O, 46.65 wt%N, and 6.71wt%H. A 6.125 grams sample of this compound dissolved in 46.205 grams of water as a solution was found to have a freezing point of -3.260C. The density of ...
April 25, 2013 by lucy

Physics
If the path-length difference between two identical and coherent beams is two wavelengths when they arrive on a screen, will they produce a dark or a bright spot?
March 22, 2008 by Emily

Physics
Find the energy (in joules) of the photon that is emitted when the electron in a hydrogen atom undergoes a transition from the n=7 energy level to produce a line in the Paschen series.
September 11, 2008 by Jenny

math check
I have a problem that I need checked it is the produce of the reciprocals of two consecutive integes is 1/182 Find the integers. I have as the answer -13,-14 or 13,14 is this correct?
October 12, 2008 by Shawn

Corprate Finance
An initial investment of $400,000 will produce an end of year cash flow of $480,000. What is the NPV of the project at a discount rate of 20%?
April 23, 2010 by Karen

Chemistry
An equilibrium mixture at 852 K is found to contain 3.61 x 10^ - 3 mol/L SO3. Calculate the equililbrium , constant , keq for the reaction where SO2 an O2 are reactants and SO3 is the produce.
May 12, 2010 by Ana

College Chemistry
25.0g of aluminum reacts with 55.0grams of chlorine gas to produce aluminum tetrichloride. Which reactant is liminting and how much product is produced? Al + Cl2 -> AlCl3
September 26, 2010 by Sam319

Science
Balanced chemical equation for the carbon monoxide gas for motor car engines combines with the oxygen gas in the air to produce carbo dioxide
September 27, 2010 by Sibusiso

Physics
In an action-adventure movie, the hero lifts the 89-kg villain straight upward through a distance of 2.0 m in 0.47 s at a constant speed. What power does the hero produce while doing this?
October 24, 2010 by Xavier

Astronomy
In what ways do Earth and the moon move through space? How do these motions produce such phenomena as day and night, the seasons, phases of the moon, and eclipse?
May 12, 2011 by Peter

11Science
A diploid organism has five pairs of chromosomes in each somatic cell. Assuming that no crossing over occurs, how many genetically distinct gametes can this organism produce?
February 15, 2012 by Rebecca

chemistry
What mass of sulfur msut be used to produce 17.1 L of gaseous sulfur dioxide at STP according to the following equation? S8 (s) + 8O2 (g) -> 8 SO2 (g) Answer in units of g
March 14, 2012 by Sarah

statistics
The ABC Company has been evaluating the performance of two advertising agencies it deals with. They produce the following scatterplot of sales against advertising expenditures.
September 6, 2012 by Gee

pope
Which of the following will help you produce clear and focused writing? A. Brainstorming before writing. B. A rubric that provides criteria. C. A solid thesis statement. D. The style of your paper.
March 19, 2013 by john

Chemistry
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.
March 20, 2014 by Anonymous

Chemistry
A saturated solution of Mg(OH)2 is prepared having a large excess of Mg(OH)2. Sn(NO3)2 is added to the solution. Ksp = 1.8 10-11 for Mg(OH)2 and Ksp = 5.1 10-26 for Sn(OH)2. (a) What [Sn2+] is required to start the precipitation of Sn(OH)2? (b) What [Sn2+] is required so that ...
March 14, 2013 by Gregory

chemistry help !!!!!!!!!!!!!!!!
Benzoic acid react with NH2 group Draw the product of this reaction, name the new functional group produced, state the type of reaction that has occurred, name any other products of the reaction and briefly explain how you arrived at your answer.( one or two sentences.)
January 21, 2013 by john

psychology
As discussed in your text, the Implicit Association Test (IAT) A. is based on a culture-free questionnaire. B. has revealed that most people arent prejudiced. C. requires subjects to react to a series of black and white faces. D. requires people to openly express and reveal ...
August 27, 2012 by rami

Chemistry
The molecular formula of a compound containg only carbon and hydrogen is to be determined. When a sample of the compound is burned on oxygen gas, 7.2 grams of water and 7.2 liters of carbon dioxide gas are produced(measured at STP). When 0.600grams of the compound are ...
January 9, 2011 by Patrick

Chemistry
A sample of ethanol, C2H5OH, weighing 2.84 g was burned in an excess of oxygen in a bomb calorimeter. The temperature of the calorimeter rose from 25.00C to 33.73C. If the heat capacity of the calorimeter and contents was 9.63 kJ/C, what is the value of q for burning 1.28 ...
June 7, 2011 by Lance

physics
suppose that resting on your non-conducting desktop is a tiny piece of paper (m=0.08g) that has a charge of 4x10^-10C. You bring your comb 3 cm away from it and the paper jumps up to the comb. Give an approximate value for the charge of the comb. Does the comb carry an excess ...
January 20, 2012 by Brandon

Chemistry
A 0.5370 g sample of a pure soluble chloride compound is dissolved in water, and all of the chloride ion is precipitated as AgCl by the addition of an excess of silver nitrate. The mass of the resulting AgCl is found to be 1.2523 g. What is the mass percentage of chlorine in ...
October 25, 2012 by Orla

chemistry
A 0.5917 g sample of a pure soluble chloride compound is dissolved in water, and all of the chloride ion is precipitated as AgCl by the addition of an excess of silver nitrate. The mass of the resulting AgCl is found to be 1.5683 g. What is the mass percentage of chlorine in ...
March 3, 2014 by smith

chemistry
2.5 moles of Cl2 reacts with a large excess of P4. The actual yield of PCl5 is 0.50 moles. What is the percent yield? P4(s) + 10 Cl2 (g)-> 4 PCl5 (g)
December 11, 2007 by Bryan

Physics
a) Family Smith has already installed PV in their house. Now, they also want to cover their needs for warm water with solar energy. For this, they consider having a solar thermal water heating system. Considering that the need for warm water is 100L/day, the water has to be ...
October 24, 2013 by youlifex

chem
would you expect 2-chlorobutane to react faster or slower than 2-bromobutane under sn1 conditions? sn2 conditions? - would it slower because of the stronger bond? and it would be sn2 reaction? i'm i on the right track?
November 24, 2008 by Jason

Biology
Will iodine react with sucrose or glucose? I would say no, because it reacts with starch, a polysaccharide, and glucose is a monosaccaride and sucrose is a combination of fructose and glucose, two monosaccharides. Am I right? Why or why not? How does iodine cause a reaction to...
March 23, 2011 by Mary

Biology
Will iodine react with sucrose or glucose? I would say no, because it reacts with starch, a polysaccharide, and glucose is a monosaccaride and sucrose is a combination of fructose and glucose, two monosaccharides. Am I right? Why or why not? How does iodine cause a reaction to...
March 24, 2011 by Mary

Chemistry
1.9 mol HCl and 3.8 mol NaOH react according to the equation HCl + NaOH −→ NaCl + H2O . Calculate the amount in moles of NaCl formed. Answer in units of mol
February 9, 2012 by Mary

Chemistry
How many moles of NaOH must be added to 1.0 L of 1.4 M HC2H3O2 to produce a solution buffered at each pH? (a) pH = pKa mol (b) pH = 3.07 mol (c) pH = 5.15 mol
December 5, 2010 by justin

chemistry
write an equilibrium constant expression for the reaction of acetylene gas with hydrogen gas to produce methane gas.
March 24, 2011 by katie

science
The chemical formula for glucose is C6H12O6. Six molecules of carbon dioxide (CO2) react with six molecules of water (H2O) to form six molecules of oxygen (O2). How many molecules of glucose will be produced? A 1 B 6 C 12 D 36 can anyone help me figure this out ? thanks.
March 25, 2010 by Sabrina

Big review 4 finals (2 posts in 1) check my work
A 7.58 gram sample of benzoic acid, C6H5CO2H, is dissolved in 100 mL of benzene. The density of benzene is 0.879 g/mL. What is the molality of the benzoic acid? Sol: Convert mL to grams benzene. 100 mL * (0.879g benzene/1 mL) = 87.9 g Molality = # molsolute / # kg solvent So I...
June 14, 2006 by Kizner (chem)

Chemistry
How many grams of NaCl (molar mass = 58.4 g/mole) must be added to 12.0 g of water (molar mass = 18.0 g/mole) so that Xwater = 0.725? My answer was 102.69 grams of NaCl. However my friend got 14.8 grams of NaCL. We are not sure who is right? Please respond, and thank you. I ...
February 5, 2007 by Aletha

Chemistry
For the theoretically perfect reaction 2H +O---2HO if you react 300 molecules pf hydrogen and 200 molecules of oxygen, how many oxygen molecules will you have that do not engage in the reaction? Answer 50, 100, 150, or 200?
January 31, 2013 by Help!!

help
In your socks assignment, create 5 scenarios, in which your hourly pay rate and the socks per hour change: the current "child labor" scenario ($0.25 per hour, 4 socks per hour) "GM employees " ($63,6) "Weedheads" ($5,1) "McDonalds employees" ($8,8) "Philippinos" ($3,30) We ...
July 23, 2011 by cass

Chemistry
1.00 g of sodium is added to a large excess of water under conditions of constant pressure (1.00 atm) and constant temperature (25 C ). The following reaction occurs: 2Na (s) +2H2O (l)------> 2NaOH (aq) +H2(g) Delta Hrxn =-369 kJ/mol Calculate the heat released after 1.00...
March 18, 2012 by Riley

Chemistry
Please check my answers. 1. Using the equations, IO3- +5I- + 6H+ -> 3I2 + 3H2O C6H8O6 + I2 -> C6H6O6 + 2I- + 2H+ how many equivalents of IO3- are required to produce enough I2 to oxidize one equivalent of ascorbic acid? Answer: 1IO3- <-> 3I2 <-> 3C6H8O6 1/3 ...
February 27, 2011 by Sara

biology
how do cells use the base sequence of a DNA molecule to produce a polypeptide? i did this today in class but i couldnt get my head around it. i know it has something to do with transcription and translation. please could somebody help me or give me any links? thank you
January 29, 2008 by sam

Chemistry
According to the quantum-mechanical model for the hydrogen atom, which of the following electron transitions would produce light with the longer wavelength: 2p --> 1s or 3p --> 1s I have the answer, which is 2p --> 1s, but can someone offer some help as to how this is...
March 16, 2009 by Jimmy

Chemistry
What volume of benzene (C6H6, d= 0.88 g/mL, molar mass = 78.11 g/mol) is required to produce 1.5 x 103 kJ of heat according to the following reaction? 2C6H6(l)+15O2(g)-->12CO2(G)+6H2O(g) :delta:Hrxn=-6278kj
July 6, 2009 by Gweedo8

Science
You are floating motionless in outer space. Your mass is 70 kg. Your 70 kg transporter floats by and you attempt to bring in closer by flexing your right arm. Are you more likely to produce an isotonic or isometric contraction? Explain.
December 10, 2009 by Jeff

Science
You are floating motionless in outer space. Your mass is 70 kg. Your 70 kg transporter floats by and you attempt to bring in closer by flexing your right arm. Are you more likely to produce an isotonic or isometric contraction? Explain.
December 10, 2009 by Jeff

science
Follow on the Sall Sue question earlier. What frequency would be required for sally and her cheerful and hard-wroking partner to produce the standing wave with three nodes. Identify the steps.
April 23, 2010 by CJ

physics - magnetism
A simple generator has a 780-loop square coil 21.0 cm on a side. How fast must it turn in a 0.650 T field to produce a 150 V peak output? I got 6.71 rev/s but that is wrong
May 13, 2010 by Anonymous

chemistry
What is the minimum amount of 5.0M H2SO4 necessary to produce 24.1g of H2(g) according to the following reaction? 2Al(s) + 3H2SO4(aq) produces Al2(SO4)3(aq)+3H2(g). Express your answer using two significant figures.
October 2, 2010 by Anonymous

Chemistry
Refer to the following equation: 4NH3 + 7O2= 4NO2 +6HO, How many moles of ammonia would be required to produce 11.9 mol of water? Can you please walk me through the steps on how to figure this problem?
March 16, 2012 by Jessica

langauge arts
Which of the following statements is an opinion? AThunderstorms are more frequent around the East Gulf Coast . BThunderstorms are extremely frightening. CThunderstorms are the result of convection. DThunderstorms can produce tornadoes.
February 27, 2013 by faithwest

Chemistry answer check
What quantity of heat is required to produce 5 mol of oxygen gas by this reaction? HgO(s) → Hg(l) + O2(g), ΔH = +90.7kJ I calculated 90.7*5, but my online homework says its wrong how do I calcuate this?
June 25, 2013 by Mary

chemistry
How do I solve this? How many grams of solid NaOH are required to prepare 200 mL of a 0.05 M solution? What will be the concentration expressed in % W/V?
February 1, 2008 by stew

CHEMISTY
WHAT IS THE MOLARITY OF A SOLUTION PREPARED BY DISSLOVING 4.92 GRAMS OF CALCIUM NITRATE, Ca(NO3)2 in 250 mL OF WATER?
July 21, 2008 by Persia

Science
Calculate the density if the mass of a solid material is measuered as 15.00 grams and its volume is measured as 5.0cmCUBED?
August 20, 2008 by Kyle

chemistry
What is the molality of a sodium chloride solution if 3.5 grams of the salt is added to 998 g of water Your Answer:
September 10, 2008 by celina

Chemistry
What pressure will be exerted by 109 grams of fluorine gas in a 3,4000mL cylinder at 20degree celcius?
April 2, 2009 by Ivana

10th grade chemistry
How many molecules of Hydrogen gas formed when 48.7 grams of sodium added to water
April 6, 2009 by katie

Chem
A 0.370mol sample of a metal oxide (M2O3) weighs 55.4g. How many moles of O? How many grams of M? And what is the unknown element M?
September 29, 2009 by JP

chemistry
How many kilograms of water must be added to 75.5 grams of Calcium nitrate to form a 0.500 m solution?
November 18, 2009 by lynda smith

Science
If 76g of Cr2O3 and 27g of Al completely ract to form 51g of Al2O3, how many grams of Cr are formed?
November 29, 2009 by Reid

chemistry
How many grams of sucrose would you dissolve in water for a total volume of 500mL to make a 5% solution?
January 20, 2010 by jami

10th Grade Honors Chemistry
volume of 8.00 grams of hydrogen gas at 32.0 degrees celcius and 1.50 atm
March 26, 2010 by Theresa

Chemistry
How many grams of NH4Cl must be added to 250ml of .2M NH4OH in order that the solution shall have a pH of 7.2?
April 20, 2010 by Johnny

Chemistry
A reastion consumes 5.0g of A and 6.0g of B. How many grams of C and D should be obtained? 1A + 3B -> 2C + 4D MC answers: 23 11 1 10 Not enough information to answer the question
September 6, 2010 by Megan

Chemistry
A reastion consumes 5.0g of A and 6.0g of B. How many grams of C and D should be obtained? 1A + 3B -> 2C + 4D MC answers: 23 11 1 10 Not enough information to answer the question
September 6, 2010 by Megan

College Chem
Calculate the number of grams required to make 250 mL of a 0.020 M KIO3 solution.
October 3, 2010 by Kelli

chemistry
You mix 50 mL of 0.1 M ammonium phosphate with 75 mL of 0.05 M calcium nitrate. How much of a precipitate forms from this reaction (in grams)?
October 4, 2010 by jazmin

Chemistry 1151
what is the pressure of a 0.85 Liter sample of Helium with a mass of 0.070 grams when it is at 5 degrees Celcius?
October 6, 2010 by Sydney

chemistry
How many grams of water are produced from the reaction of 1.26 mol of oxygen according to this equation? 2H2(g) + O2(g) 2H2O(g)
October 13, 2010 by Anonymous

chem 101
how many grams of oxalic acid dihydrate to completely neutralize 25ml of 0.12 M of sodium hydroxide
October 18, 2010 by andrew

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