Friday
September 30, 2016

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: 22,247

chem
an average airbag contains 132 g of NaN3. How many liters of nitrogen would produce on a warm day at 85 degrees F and a pressure of 1atm?
April 26, 2011 by tracy

chemistry
which substance , glucosa or sodium chloride, will produce more freezing point depreccion whent added to equal amounts of water
May 17, 2011 by lola

Chemistry
Give the following reaction,find the mass of oxygen required to produce 13grams of CO2; C3H8+5O2--->3CO2 + 4H2O
June 15, 2011 by Charlie

chemistry
Consider the reaction Mg +2HCl ------>MgCl2 + H2 What is the minimum amount of 1.85M HCl is necessary to produce 28.5L of H2 at STP Please help me work this problem
November 6, 2011 by swtnblk

Phizzics....
Both positive and negative charges produce electric fields. Which direction, toward or away from itself, does the field point for each charge?
May 15, 2012 by matin

physics
A laboratory ultracentrifuge is designed to produce a centripetal acceleration of 4.0 106 g at a distance of 5.00 cm from the axis. What angular velocity in rev/min is required?
January 10, 2013 by Anonymous

chemistry
What mass in kg of NH3 must be used to produce 4.4 multiplied by 106 kg HNO3 by the Ostwald process, assuming 100% yield in each reaction?
August 1, 2013 by Kris

chemistry
What mass in kg of NH3 must be used to produce 4.4 multiplied by 106 kg HNO3 by the Ostwald process, assuming 100% yield in each reaction?
August 1, 2013 by Kris

chem
What volume of benzene (C6H6,d=0.88g/ml,molar mass=78.11g/mol) is required to produce 1.5 x 10^3 kJ of heat according to the following reaction?
November 18, 2013 by Melissa

Chemistry
What is the minimum amount of 5.9M H2SO4 necessary to produce 27.7g of H2 (g) according to the following reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g)
March 5, 2014 by Jill

physics
Imagine having an 80-turn coil with radius of 5.0 cm and resistance of 30 . At what rate must a perpendicular magnetic field change to produce a current of 4.0 A?
March 30, 2014 by Lucy

Physical Science
13. Why can convex mirrors only produce virtual images? Sadly, I can't find this answer in my book. :( Any help would be appreciated, please and thank you!
April 6, 2014 by Alex

science (check!)
when fossil fuels are burned they produce _____, the main greenhouse responsible for global warming trends. ----MY ANSWER: emission?---
May 26, 2014 by luna

Psyc
3. Rita, a sports psychologist, has applied for a huge grant to study factors that will produce more winners in the next international competition.
February 20, 2015 by karen

Economics
Why would a country such as the United States, which can presumably produce everything it needs itself, choose to trade with other nations?
March 17, 2015 by Anonymous

Human Growth and Reproduction
1.)After an egg is fertilized, it begins to A.)Travel toward the ovary B.)Produce estrogen C.)Break down D.)Divide Is it D?
December 16, 2015 by Canary

physics
A train is moving with an initial velocity of 30 m/s the breaks are applied so as to produce uniform acceleration of minus 1.5m/s Calculate the time in which it will come to rest
June 6, 2016 by devika

Ethics
1. Which of the following is a key Aristotelian idea that describes a midpoint between extremes of excess and deficiency? A. Eudaimonia B. The golden mean C. The middle path D. Care is it B 2. Which of the following is a virtue commonly emphasized in criminal justice ...
March 16, 2014 by Any

science - need help
a strip of silver does not react with any of the solutions tested what must be true about silver the solutions are: lead acetate zince sulfate and copper sulfate
November 21, 2007 by sam

chemistry
when we are synthesis n-butyl bromide what impurities we can expect in the crude product?and how would these impurities react with concentrated sulfuric acid?and also how we can make t-butyl bromide?
March 13, 2011 by sashika

Chemistry
FeCl3(aq) + K2S(aq) Fe2S3(aq) + KCl(aq) Consider the unbalanced equation above. What is the maximum mass of Fe2S3 that can be produced when 54.5 mL of 0.480 M FeCl3 and 98.5 mL of 0.420 M K2S react?
October 7, 2013 by Connor

Chemistry
Take the reaction: NH3 + O2 ---> NO + H2O. In an experiment, 3.25 g of NH3 are allowed to react with 3.50 g of O2. Which reactant is the limiting reagent? You may either write the formula or the name of the limiting reactant.
December 21, 2015 by Ayame

chemistry
Acids and bases react with one another to form compounds called ______? A. salts B. ions C. mixtures D. salts, ions, and mixtures
September 14, 2010 by junior

Chemistry
Acids and bases react with one another to form compounds called ______? A. salts B. ions C. mixtures D. salts, ions, and mixtures
September 16, 2010 by Jason

chemistry
Can you please explain the buffer system used in buffered aspirin? For example, what is the chemical formula of the buffer that is used? How does it react with the aspirin?
June 14, 2011 by Jessica

Chemistry
6g of metal M react completely with 23.66g of chlorine to form 29.66g of the metallic chloride. Find the empirical formula of the metallic chloride. (M = 27, Cl = 35.5)
August 19, 2013 by Adigun

chemistry help
When carbon dixode and carbon react the balanced equation is Co2+C--------------2Cq Calculate the mass of carbon monoxide formed from 4.4g of carbon dixode
March 3, 2015 by Victoria

Science college
An elements X having mass and atomic number A and Z react with neutron to give gamma ray and P with mass and atomic number 1.what is X?
October 27, 2015 by Bauras

Chemistry
6g of metal M react completely with 23.66g of chlorine to form 29.66g of the metallic chloride. Find the empirical formula of the metallic chloride. (M=27,Cl=35.5)
January 23, 2016 by Anonymous

biology
What is needed when experimenting on humans
December 16, 2007 by mike

math help needed
if 2ax-5x=2, then what is x equivqlent to?
January 10, 2009 by Anonymous

Math
How many matchsticks are needed for a 6 6 design? A) 42 B) 72 C) 40 D) 84 C)40
July 12, 2011 by candy

Math
rename or simplify as needed 11 1/4 - 5 8/9
February 2, 2013 by JR

math
4 5/8 + 9 3/5 = rename or simplify as needed
February 2, 2013 by JR

maths-urgently needed
if p(x) = px^7 + qx^3 + rx - 5 where p , q , r are constants , if p(-7) = 7 then p(7) = ?
February 9, 2013 by Anonymous

maths-urgently needed
If a+b+c=0 then prove that a^4+b^4+c^4=2(a^2b^2+b^2c^2+c^2a^2)
February 17, 2013 by Anonymous

socials 11
why was totalitarian needed for ww2?
July 11, 2013 by alyssa

Math help needed urgently
X + y + z =1 x^2 + y^2 + z^2 =35 X^3 + y^3 + z^3 =97 find x , y. z
February 25, 2016 by Afeez

engineering
In the process of electrolysis, electrical power is used to separate water into oxygen and hydrogen molecules via the reaction: H2O --> H2 + O2 This is very much like running a hydrogen fuel cell in reverse. We assume that only the activation potential for the hydrogen ...
December 19, 2013 by Timothy Boons

physics
In the process of electrolysis, electrical power is used to separate water into oxygen and hydrogen molecules via the reaction: H2O --> H2 + O2 This is very much like running a hydrogen fuel cell in reverse. We assume that only the activation potential for the hydrogen ...
December 20, 2013 by Arnold Smith

Chemistry
A 3.23 gram sample of a sodium bicarbonate mixture was reacted with excess acid. 48.52 mL of the evolved gas was collected of the water at .930 atm. and 23.0 degrees C. What is the percentage of sodium bicarbonate in the original mixture?
April 23, 2011 by Adele

accounting 2
Peason began 20xx with 30,000 $1 common shares issued and outstanding.paid in captial in excess of par was $25,000 and retained earnings were $175,000 net income for 20xx was $22,000.
May 20, 2013 by charlene

Chemistry
How many liters of Cl2 has at a pressure of .950 atm and a temperature of 298K will be collected from the reaction of 25 mL of a .100 M aqueous solution of KMnO4 and an excess of HCI? KMnO4+HCI->MnCl2+Cl2+H2)+KCl
July 20, 2013 by Sara

English
I've selected the poem The Casual Ward by Sir Luke Fildes which shows the poverty of the time period due to the industrial revolution. I would like to start off my paper with an introduction to the Industrial Revolution and list the positive and negative effects. Here are some...
June 30, 2008 by Adams

Physics
A metal sphere has a charge of -6 C. How many excess electrons are there on the sphere? 4x10^-13 10x10^13 4x10^13 10x10^-13 I'm stuck between A or D...
October 19, 2012 by I'm bad at physics

math
How many hours of jogging at 5 1/2mi/h would be needed for a 200 pound person to lose 5 pounds and it takes 3500 cal for one pound 740 cal/h for jogging 5 1/2 mi/h Please post your answer, and we'll be glad to critique it. 750x3500 740x3500=2590 No, not right. If it takes ...
March 16, 2007 by patti help

Chemistry
suppose that you have a n unlimited supply of copper II chloride to react with iron. how manyt moles of copper would be produced by reacting 34.0g of iron with the copperII chloride solution?
December 10, 2008 by Lily

Chemistry
Water will react most completely as an acid with A. SO3^-2 B. H2BO3- C. C6H5O- D. CH3COO- Why isn't the answer A, since H2O + SO3^-2 <-> HSO3- + OH- so H2O and HSO3- are the conjugate acids.
May 4, 2010 by sh

chemistry 105
Consider the following reaction: Li2S(aq)+Co(NO3)2(aq)-->2LiNO3(aq)+CoS(s) What volume of 0.150 M Li2S solution is required to completely react with 125 mL of 0.150 M Co(NO3)2?
October 10, 2011 by julie

Chemistry (balancing eq)
I need to write a formula where PbNa reacts with water. 2PbNa + 2 H20 = 2 NaOh + H2 +Pb It says in the question that lead doesn't react with water, but Na does. Did I write the formula correctly?
October 1, 2013 by Kristine

chemistry pls help me asap
2.08g of metal Y react with 0.96g of oxygen to form a metal oxide.The empirical formula of the metal oxide is Y2O3.What is the relative atomic mass of metal Y.
May 15, 2014 by mandy

Chemistry
What volume (in mL) of a 0.300 M HNO3 solution will completely react with 43.9 mL of a 0.146 M Na2CO3 solution according to this balanced chemical equation? Na2CO3(aq)+2 HNO3(aq)->2 NaNO3(aq)+CO2(g)+H20(l)
November 9, 2015 by Connor Smith

Chemistry
What volume (in mL) of a 0.300 M HNO3 solution will completely react with 43.9 mL of a 0.146 M Na2CO3 solution according to this balanced chemical equation? Na2CO3(aq)+2 HNO3(aq)->2 NaNO3(aq)+CO2(g)+H20(l)
November 9, 2015 by Connor Smith

Chemistry
What volume (in mL) of a 0.300 M HNO3 solution will completely react with 43.9 mL of a 0.146 M Na2CO3 solution according to this balanced chemical equation? Na2CO3(aq)+2 HNO3(aq)->2 NaNO3(aq)+CO2(g)+H20(l)
November 9, 2015 by Connor Smith

CHEMISTRY
A compound which contains hydrogen, oxygen, carbon only has molar mass of about 85 g/mol. When 0.43 g of the compound is burned in excess of oxyfen, 1.10 g of CO2 and 0.45 g of H2O are formed. Find the molecular formula and the empirical formula of the compound
July 18, 2016 by Clive Lodnyx

Science
Match these with the key terms (1) A form of energy that is always transferred from a warmer substance to a cooler one. (2) device that converts hear to a small amount of electric energy often used in temperature sensors. (3) A Push button barbecue lighter produces a small ...
December 2, 2013 by Aurore

Chemistry
OMG, I did the other fifteen questions of my homework but I'm stuck on these. #1: Which has the higher average kinetic energy, a tub full of 50'C water, or a small cup of 52'C water. Why? Which has more total kinetic energy, the tub or the cup? Why? #2: Lithium, sodium, and ...
September 24, 2008 by W I C K E D

Quick chemistry check
Please check each of these mole statements. Correct me if I'm wrong! 1. 59g of hydrochloric acid (HCL)=____moles I got 1.6 moles 2. 4.6 moles of sodium hydroxide (NaOH)=___ grams I got 184 grams 3. 35.0 of sulfuric acid (H2SO4)=__ f.u sulfuric acid I got 2.15x10^25th power ...
February 25, 2015 by Anonymous

Chem
A particular coal contains 2.5% sulfur by mass. When this coal is burned, the sulfur is converted into sulfur dioxide gas. The sulfur dioxide reacts with calcium oxide to form solid calcium sulfite. If the coal is burned in a power plant that uses 1800 tons of coal per day, ...
September 17, 2012 by Ezra

History
1. What did John C. Calhoun want for the future for the U.S.? 2. What did Frederick Douglass want for the future for the U.S.? 3. How did John C. Calhoun change the U.S.? 4. How did Frederick Douglass change the U.S.? 5. How did John C. Calhoun react to some key events ...
March 12, 2015 by Hailee

chem
AgNO3 + NaCl produces AgCl + NaNo3 how much AgCl is produced when 3.10g of AgNO3 and .600g of NaCl react?
December 8, 2010 by alex

Chemistry
If you react 2.0 g AgNO3 and 2.5 g Na2SO4, what is the percent yield if the actual yield is 1.6 g Ag2SO4? 2AgNO3 + Na2SO4 → Ag2SO4 + 2NaNO3
January 24, 2012 by Ana

Chemistry
If I react a phosphorus ylide with trans-cinnamaldehyde, what would the ratio of trans-trans to cis-trans isomer would I likely get?
March 30, 2012 by Sam

finance
Under normal conditions (70% probability), Financing Plan A will produce $24,000 higher return than Plan B. Under tight money conditions (30% probability), Plan A will produce $40,000 less than Plan B. What is the expected value of return for Plan A over Plan B? $28,800 $4,...
July 24, 2008 by lashay- 3 quesions help me

Chemistry
The percent is confusing me, can you please help me set this equation up. How much heat is liberated when 5.00 kg of coal is burned if the coal is 96.2% carbon by mass and the other materials in the coal do not react? (delta)H comb of carbon is -394kJ/mol thank you
August 3, 2015 by Syd

Science
Hormones and Homeostasis 1) The human endocrine system is made up of which of the following structures? :Vessels. :Receptors. :Glands.*** :Chambers. 2. Which of the following best describes the function of the endocrine system? :It secretes chemical messengers that travel ...
February 27, 2015 by TheLOUDEST_0430

math
Some people believe that calculators have eliminated the need to learn the skills required to perform mathematical operations by hand. State your position on this belief, and then support your position with real-life stories or examples I will be happy to critique your ...
March 4, 2007 by carmen

chemistry
Why is it important that the sequence of addition of reagents be followed? What could possibly go wrong when this is not followed? Reagents added: 1st: Fe3+ solution 2nd: 2.00 mL 10% NH2OH-HCl (hydroxylamine hydrochloride) 3rd: excess 0.20% 1,10-phenanthroline 4th: 1.00 mL ...
September 15, 2007 by smiley

chemistry
Why is it important that the sequence of addition of reagents be followed? What could possibly go wrong when this is not followed? Reagents added: 1st: Fe3+ solution 2nd: 2.00 mL 10% NH2OH-HCl (hydroxylamine hydrochloride) 3rd: excess 0.20% 1,10-phenanthroline 4th: 1.00 mL ...
September 15, 2007 by smiley

Chemistry
Sulfur (3.26 g) is burned in a constant volume calorimeter with excess O2(g). The temperature increases from 21.25C to 28.22C. The bomb has a heat capacity of 923 J/K, and the calorimeter contains 815 g of water. Calculate ΔU per mole of SO2 formed, for the following ...
October 19, 2010 by Noelle

physics
An oil drop is stationary within an electric field of 490 V/m that is set up between two parallel plates. If the volume of the oil drop is 4 X 10 (-19) m3, how many excess electrons does it carry? (I'll give ya'll just one hint: the fundamental unit of charge e = 1.6 X 10 (-19...
June 29, 2012 by ALICIA

chemistry
i.Calculate the volume of carbon ivoxide given off at stp when 20gram of octane is burnt in excess air (c=12,1+=1 gmv of any gass is 22.4dm^3 at stp). ii. Deduce the formula of a hydrocarbon with general formula cnH2n-2 of its molar mass in 110.
September 5, 2016 by lawrence

Chemistry
In fertilizer manufacturing the cimpounds below are mixed together to form a composite fertilizer. My question is: Is there a reaction between SOLID ammonium phosphate, potassium chloride, ammonium nitrate, and superphosphate? (or any combination? or will they react if all are...
March 8, 2012 by Namie

stoiciometry (chemistry)
calculate the theoretical yield of Cu when 53.2g Cu2S react with oxygen. (balanced equation is CU2S+02>2Cu+S02) Please help me figure this homework out. I just dnt get how to get the theoretical yeild. I want to know to be able to do the rest right. Thanks much!
April 15, 2013 by lila

Chemistry 3
How is it possible for me to tell which of these solutes will produce an acidic solution when dissolved in water? LiOH CH3CO2K H2SO3 KOH NaOH NH4NO3 NaOH NaOH can't be the only one... Molecules that produce OH^- when dissolved in water will be basic. Examples:LiOH, KOH, NaOH, ...
May 24, 2007 by Lindsay

chemistry
OKOK I know that I have posted this question but I just don't understand the last part. 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- concentrations when the mixture comes ...
May 16, 2007 by mel

Chemistry
2MnO4-(aq) +5 H2O2 (aq) + 6H+(aq) -> 5 O2(g) + 2 (Mn2+(aq) = 8H2O (l) If a 25.00 ml sample of hydro peroxide required 25.25 ml of .353 M KMNo4 solution to react with all the hydrogen perozide what was the molarity of the hydrogen peroxide solution?
June 7, 2011 by Vinny

chem 121
Iron and oxide react to form iron(lll) oxide: 4Fe(s) + 3O2(g)+ 2FeO2(s) Determine the limiting reactant in each of the following mixtures of reactants: 2.0 moles of Fe and 6.0 moles of O2
November 18, 2011 by claire

Chemistry
I could use some help please. Ammmonia, NH3, can be made by reacting Nitrogen with Hydrogen. N2+3H2=2NH3 How many moles of NH3 can be made if 7.5 moles of H2 react eith enough N2? Thank-you in advance for any help
March 18, 2013 by Sara

Chemistry Need Help
Given the chemical equation, Cl2 + F2 2ClF, how many moles of ClF are produced in the reaction, if 1.50 moles Cl2 are made to react with 1.75 moles F2 ? I got the answer 3.50 moles but it was wrong. Can anyone help me please.
February 27, 2015 by Matthew

chemistry
At a certain temperature, the equilibrium constant, K, for this reaction is 53.3. H2(g)+I2(g)->2HI(g) At this temperature, the reactants were placed in a container to react. If the partial pressures of H2 and I2 were each 0.300 bar initially, what is the partial pressure of...
March 12, 2015 by kelsey

chem
CaCo3 reacts with aq HCl to give CaCl2+CO2. What mass of CaCo3 is required to react completely with 50cm^3 of 0.60M HCl. Calculate volume of CO2 produced at STP.
September 29, 2015 by sharon

chemistry
thermochemistry chem conceptual. i just want to check my understanding of this Say you got this: 1)A + b=c A=4.0 grams and -91.8kj evolve How do you find change of H ? I guess you convert A to grams and then shove it under the evolved heat ? ie. change of H= -91.8kj/2 mol= 2)...
August 7, 2009 by Jim_R

chemistry
A particular brand of toothpaste claims to contain 0.24 wt% sodium fluoride. What mass in grams of fluoride ion would be present in the average amount of toothpaste used to brush one's teeth, about two grams? Now this is a weight percent concentration question, I know that. wt...
May 7, 2015 by frank

Math
If a community clinic invested $3,000 in excess cash today, what would be the value of its investment at the end of three years: a. at a 12 percent rate compounded semiannually? B. at a 12 percent rate compounded quarterly?
August 2, 2013 by April

Chemistry
20cubic centimeters of 0.27M sodium hydroxide solution is added to 18.2cubic centimeters of 0.75M hydrochloric acid.To the solution is then added excess magnesium.What volume of hydrogen gas measured at s.t.p evolved?
September 23, 2016 by Doris

Music
Ok, so this question isn't exactly for school, but i needed help for it, and thought you guys might be able to help me out. Ok, so i am rewriting/rewording lyrics to the song 'Come back to Texas' by Bowling for Soup. (Search the song on Youtube if it will help.) Im rewriting ...
December 1, 2008 by Twila

calculus
Find the resultant vector. 1) A force of 35 grams and 45 grams applied at right angles. 57.009 g at 52 with respect to the 35 kg force 2) Velocities of 400 mph due north and 500 mph due east. 640.31 mph at 51 with respect to the 400 mph force 3) Displacements of 90 meters ...
October 5, 2015 by sasha

science
how to convert grams andmeters and stuff like that?
September 12, 2007 by bob

Chem Urgent!
What is the number of grams for 1 mol lead?
February 20, 2008 by Lisa

Chemistry
What is the mass in grams of 1.02X10^24 molecules of NaCl?
March 11, 2008 by J

Chemistry
How many grams of KCl can you dissolve in 50. g of water at 70 degrees C?
May 5, 2008 by Kate

Science
How many liters is 480.725134 grams of water?
September 7, 2008 by codie

Chemistry 2 Ap
Thats CaCo3 is equal to 1.838 grams. **sorry!
September 10, 2008 by jecce.

7th grade
what is 2.56 grams equals _____ miligrams
September 30, 2008 by NIck

Chemistry
how many grams does 0.500 moles of CuBr weigh?
December 8, 2008 by temi

chemistry
how many grams are in 5.66 mol of CaCO3? (the three is the subscript)
December 10, 2008 by STEPHANIE

chemistry
How do I change the molecular weight(58) of NaCl to grams?
January 5, 2009 by Iedane

Chemistry
How do you determine the number of atoms in 28.7 grams of gold (Au)
February 19, 2009 by Kristina

science
if I have 0.0899 g/L what would it be for grams per mL?
April 2, 2009 by Anonymous

  1. Pages:
  2. <<Prev
  3. 61
  4. 62
  5. 63
  6. 64
  7. 65
  8. 66
  9. 67
  10. 68
  11. 69
  12. 70
  13. 71
  14. 72
  15. 73
  16. 74
  17. 75
  18. Next>>