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October 1, 2016

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chemistry
an aspirin tablet contains 5.00X10^2 mg of active ingredient. how many grams of ap of active ingredient does it contain
July 5, 2010 by kelly

Honors Chemistry
Fe2O3 + 2Al --> 2Fe + Al2O3 How many grams of Fe will form when 97.6g Al2O3 form? Please & Thank you
February 23, 2010 by Ana

chemistry
A 2.9-L sample of paint that has a density of 4.65 g/mL is found to contain 26.7 g Pb3N2(s). How many grams of lead were in the paint sample?
September 25, 2010 by caroline

Chemistry
If 18.0g of CO2 is produced in the reaction of C2H2 with O2 to form CO2 and H2O how many grams of H2Oare produced
November 25, 2010 by Mat

chem
what is the molality of a solution of 50.0 grams of propanol in 152 mL water if the density of wate is 1.0 g/mL and the density of the solution is 0.78 g/mL
February 12, 2011 by paula

Chemistry
How many grams of ice are needed to cool 250 ml of water from 75 degrees celcius to 5 degrees celcius?
April 12, 2011 by Thao

Chemistry
What is the mass of carbon dioxide if 100 grams of methane is oxidized to carbon dioxide and water?
April 27, 2011 by joy

Chemistry
What is the mass of carbon dioxide if 100 grams of methane is oxidized to carbon dioxide and water?
April 28, 2011 by joy

chemistry
if 25 moles of sodium phosphate are reacted with potassium hydroxide, how many grams of potassium phosphate will form?
May 6, 2011 by carlene

help
the half-life of a radium is 1690 years is 90 grams is present now, how much will be present in 70 years
December 2, 2011 by Anonymous

organic chemistry
If you are given a 6.75% (wt./vol.) NaOCl solution, how many grams of NaOCl are in 100 mL of the solution? how do you do this please???
February 1, 2012 by Siral

chem 4
How many grams of sodium chloride are needed to make 1 L of 0.9% (m/v) sodium chloride solution (isotonic saline).
November 22, 2012 by don

Chemistry
What is the concentration (in M) of an ammonia (NH3) solution if 12.23 grams of ammonia are dissolved to make a 520 mL solution?
March 11, 2013 by Ashley

chemistry
3. You will be using 10.0 mL of silver nitrate solution labeled 170.0 g/L. How many grams of silver nitrate will be in your 10.0 mL sample?
March 12, 2013 by Anonymous

Math
For a chemistry experiment, Heather needs 3.75 grams of salt. How many decigrams of salt does Heather need?
March 24, 2013 by Kaylee

chem
the mass of the oxygen (o2) in a room is 0.0568 grams. How many oxygen molecules are in the room. 2 conversions are needed.
May 15, 2013 by rachel

Chemistry
3.91 mol of magnesium and 3.91 mol of hydrochloric acid are reacted, how many grams of magnesium chloride will be produced?
July 30, 2013 by Oliver

Chemistry
What mass of rhodium contains as many atoms as there are zirconium atoms in 51 g of zirconium? Answer in units of grams.
November 25, 2013 by Nayyar

physical science
A pure gold bar is made up of 19.55mol of gold. What is the mass of the bar in grams?
September 7, 2016 by ally

math 2
judith has a necklace with a mass of 65.736 grams. what is the mass of her necklace rounded to the nearest tenth?
April 30, 2014 by jenny

Chemistry
Determine the number of grams of Potassium Iodate present in 10.0 g of a 0.267 m Potassium Iodate solution.
February 1, 2015 by Bethany

Math
An atom of gold has a mass of approximately 3.25 times 10^-22 grams. What is the mass of 3000 atoms of gold?
March 19, 2015 by Thaddeus

Chemisrty
Calculate the grams of substance from the moles of substance given.... 2 moles C6H10O5. Please help I am lost!
June 17, 2015 by Michelle

Chemistry
How do you calculate the number of moles and atoms of magnesium given the number o grams of magnesium chloride?
January 6, 2016 by Anonymous

Math
A 7(1/2)% strength solution has been prepared. a) How many grams of medication are in the 7(1/2)% strength solution how do I setup this question?
February 24, 2016 by Matty

Science
Humidity is the amount of water vapor in the air at a given time. At warm temperatures, air can hold more moisture than it can at cold temperatures. Relative humidity is the amount of vapor the air is holding expressed as a percentage of the amount the air is capable of ...
July 18, 2008 by Jimmy

Chemistry
How do I make the following coversions, in standard exponential form? 1)14.8g to micrograms 2)3.72 X 10-3kg to grams 3)66.3 L to cubic centimeters 1 g = 10^6 micrograms = 10^6 ug. 14.8 g x (10^6 ug/1 g) = 14.8 x 10^6 ug = 1.48 x 10^7 ug. You do the others. 1 kg = 1000 g 1000 ...
January 25, 2007 by Bryan

chemistry
when 18.66 g of magnesium react with 22.28g of oxygen, 30.94g of megnesium oxdie forms. If all the magnesium reacts, how many grams of oxygen remain un-reacted?
November 20, 2007 by jason

chemistry,again
3 Fe2O3 + 1 CO → 2 Fe3O4 + 1 CO2 how many grams of Fe2O3 are needed to prepare 255 g of Fe3O4? a. 118 g b. 552 g c. 264 g d. 383 g
April 7, 2008 by Sarah

CHEMISTRY
HOW MANY MOLES OF NH3 WOULD BE FORMED FROM 50 GRAMS OF (NH4)2SO4 IN THE FOLLOWING EQUATION? (NH4)2SO4 + 2 NaOH=2NH3 + 2 H2O + Na2SO4
December 27, 2009 by ANGELA

chemistry
how many grams of sodium are used to prepare 50 boxes of crackers? hint:serving size= 0.50 ounces (6 crackers)a box has a net weight of 8 ounces
January 29, 2010 by Anonymous

Chemistry
A certain vinegar is 6.02% acetic acid (HC2H3O2) by mass. How many grams of HC2H3O2 are contained in a 355-mL bottle of vinegar? Assume a density of 1.01g/mL.
February 19, 2010 by lucylu

Science chemistry
Assume 2.5 grams of benzion and 12.0 mL of 15.8 M nitric acid (density = 1.51 g/mL) was used in the experiment . What is the mole to mole ratio of benzion and nitrate ion.
April 27, 2010 by Joe

11th grade
The latent heat of vaporization of water is 540 calories/gram. How many calories are required to completely vaporize 500 grams of water?
May 4, 2010 by katlyn

Science
how many mililiters of a 0.4 molar HCl solution are needed to react completely with 13 grams of zinc according to the following equation? Equation. 2 HCl + 1 Zn -----> 1 ZnCl2 + 1 H2
July 13, 2010 by Nicole

Chemistry
how many mililiters of a 0.4 molar HCl solution are needed to react completely with 13 grams of zinc according to the following equation? Equation. 2 HCl + 1 Zn -----> 1 ZnCl2 + 1 H2
July 13, 2010 by Nicole

chemistry
How many grams of calcium chloride would you dissolve in water to make a total .111 M calcium chloride solution with 200 mL final volume?
July 13, 2010 by fiath

Math
10cm 3cute of normal specimen of human blood contains 1.2g of hemoglobin how many grams does 18cm 3cute of the same blood contain? Please help!
July 30, 2010 by Delores

Chem
A titration was performed in which 56 ml of a .022M HCL solution was used to titrate 50 ml of a PB(NO3)2 solution a) what was original concentration of the Pb(NO3)2? b) How many grams of PBCl2 will ppt?
October 9, 2010 by MAX

Chemistry
A titration was performed in which 56 ml of a .022M HCL solution was used to titrate 50 ml of a PB(NO3)2 solution a) what was original concentration of the Pb(NO3)2? b) How many grams of PBCl2 will ppt?
October 9, 2010 by MAX

biology
between 5 degrees celcius and ten degrees celcius, which solute shows the greatest change in the amount that can be dissolved in 100 grams of water?
October 10, 2010 by Anonymous

chemistry
How many kilojoules of heat is required to completely covert 60.0 grams of water at 32.0 C to steam at 100C? For water: s = 4.179 J/g C Hfusion = 6.01 kJ/mol Hvap = 40.7 kJ/mol
November 29, 2010 by Kate

chemistry
How many kilojoules of heat is required to completely covert 60.0 grams of water at 32.0 C to steam at 100C? For water: s = 4.179 J/g C Hfusion = 6.01 kJ/mol Hvap = 40.7 kJ/mol
November 29, 2010 by Kate

Chemistry
calculate the enthalpy change in delta H foor heating 250 grams of liquid water from 0 degrees celcius to 100 degrees celcius.
February 11, 2011 by Bri

Chemistry
Calculate the mass of silver metal (Ag) produced from the reaction of 5.58 grams of copper metal (Cu) according to the following reaction: Cu(s) + 2AgNO3(aq) --> Cu(NO3)2(aq) + 2Ag(s)
February 27, 2011 by Carly

Honor Stoichiometry
2AgNO3 + BaCl2 ==> 2AgCl + Ba(NO3)2 How many grams of silver chloride are produced from 5 g of silver nitrate reacting with an excess of barium chloride?
March 23, 2011 by Brit

Chemistry
Any one there who would help me with my pr0blem!Please help me,tnx! What is the mass of carbon dioxide if 100 grams of methane is oxidized to carbon dioxide and water?
April 28, 2011 by joy

science
The concentration of commercially available concentrated nitric acid is 70% , or 15.9M In 100 grams of solution there are 1.11 mol of HNO3. Calculate the volume of 100 g of the Solution.
July 3, 2011 by Lahna

Chemistry
How many moles of H2O (g) are produced when 4.3 grams O2 (g) are consumed? C4H6+O2-->CO2+H2O My try at balance is: C4H6+4O2+3/2O2-->4CO2+3H2O
September 9, 2011 by Aha

Chemistry
Calculate the molarity of Na2C204 solution prepared by dissolving 1.2222 grams of pure Na2C204 in enough water to make 500.00 mL of solution.
October 25, 2011 by Ashley(please help!!!!)

Chemistry
Calculate the molarity of Na2C204 solution prepared by dissolving 1.2222 grams of pure Na2C204 in enough water to make 500.00 mL of solution.
October 25, 2011 by Ashley(please help!!!!)

chem 1
a NaOh solution has a concentration of about 0.11M.How many grams of KHP would have to be used to require NaOH solution to reach the endpoint
November 7, 2011 by karen

chemistry
Given the following reaction: HCl(g) + SrO(s) → SrCl2(s) + H2O Calculate the mass of HCl in grams that would react with 7.70 kg SrO
November 14, 2011 by riali

Science
How many grams of oxygen are collected in a reaction where 230. mL of oxygen gas is collected over water at a temperature of 25C and a total pressure of 697 torr?
February 16, 2012 by JJ

Chemistry
Calculate the amount in moles and the mass in grams of KOH needed to convert 1.50 g of aluminum to KAl(OH)4. Balanced equation = 2 Al (s) + 2 KOH (aq) + 6 H2O (l) 2 KAl(OH)4 (aq) + 3 H2 (g)
February 29, 2012 by Cynthia

Chemistry
Calculate the amount in moles and the mass in grams of KOH needed to convert 1.50 g of aluminum to KAl(OH)4. Balanced equation = 2 Al (s) + 2 KOH (aq) + 6 H2O (l)->2 KAl(OH)4 (aq) + 3 H2 (g)
February 29, 2012 by Cynthia

chemistry
how much heat energy is released from cooling 35 grams of steam at 135 degrees celcius down to freezing it to negative 45 degrees celcius?
March 22, 2012 by Anonymous

chemistry
How many grams of hydrogen are collected in a reaction where 1.80L of hydrogen gas is collected over water at a temperature of 40degrees C and a total pressure of 738torr?
April 28, 2012 by Jessica

chemistry
if 180 grams of ice at -123 degrees celsius is heated to steam at 125 degrees celsius, how much energy would it take?
April 29, 2012 by Anonymous

chemistry
jason needs to use 63.5 grams of alcohol that has a denisty of .818 g/ml. How many millilters of the alcohol would jason need?. show work please
September 17, 2012 by alexis

chemistry
Listerine mouthwash is 21.6%ethyl alcohol by volume. What mass of ethanol is contained in 20.0 mL of mouthwash? (The density of ethanol is 0.789 g/mL.) Answer in units of grams
September 19, 2012 by cheri

chem
if a car produces 81g of {\rm CO_2}, how many grams of {\rm O_2} are used up in the reaction? the complete chem reaction is C2H6O+3O2--->2CO2+3H2O
October 19, 2012 by tracy

college chemistry
if 2.00g of Zn is allowed to react with 2.00g of CuSO4 according to the equation CuSO4(aq) + Zn(s)-----> ZnSO4 (aq)+ Cu(s) how many grams of Zn will remain after the reaction is complete ?
November 5, 2012 by isabel

ap chemistry
We observe that 5 grams of a gaseous com- pound occupies 1526 mL at 49C and 672 torr. What is the molecular weight of the com- pound? Answer in units of g/mo
February 10, 2013 by cheri

Chemistry
How many grams of oxygen are collected in a reaction where 247 mL of oxygen gas is collected over water at a temperature of 25C and a total pressure of 697 torr?
February 18, 2013 by Olivia

Chemistry -need help in solving problem
The solubility of a gas at 7.0 atm of pressure is 0.52 g/L . How many grams of the gas would be disolved per 1.0 L if the pressure increased 40 percent?
March 4, 2013 by Joy

chemistry
calculate the mass in grams of hydrogen chloride produced when 5.25 L of a molecular hydrogen measured at STP reacts with an excess of molecular chlorine gas
March 24, 2013 by jane

Chemistry
Determine the solubility of a sodium sulfate, Na2SO4, in grams per 100g of water, if 0.94 g of Na2SO4 is dissolved in 20 g of water to make a saturated solution.
May 3, 2013 by Alex

AP Chemistry
Listerine mouthwash is 21.6% ethyl alcohol by volume. What mass of ethanol is contained in 20.0 mL of mouthwash? (The density of ethanol is 0.789 g/mL.) Answer in units of grams
September 11, 2013 by Gabriella

Chemistry
What mass in grams of a 0.500 m(molal) solution of sodium acetate, CH3CO2Na, in water would you use to obtain 0.200mol of sodium acetate?
February 2, 2014 by Jessica

chemistry
How many grams of dry NH4Cl need to be added to 2.00L of a 0.100M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.86? Kb for ammonia is 1.810−5.
April 22, 2014 by Jennifer

chemistry
what is the final temperature of amixture containning 25 grams of ice at -20 degree celciusadded to water at room temperature 22oC mass of water is 50g
May 8, 2014 by treasa

chemistry
if 21.54 grams of caco3 is added to an ecxess of HCl in the equation Cacl3+2Hcl produces Cacl3+co2+H20, what mass does co2 produce?
May 13, 2014 by annie

chemistry
Hydrogen and chlorine react to yield hydrogen chloride: H2+ Cl2 ( 2HCl. How many grams of HCl are formed from reaction of 3.56 g of H2 with 8.94 g of Cl2? Which reactant is limiting?
August 21, 2014 by Anonymous

Chemistry
The combustion of octane produces carbon dioxide and water. If you start with 10.0 mol of octane, what mass of water (in grams) would you expect to produce?
October 28, 2014 by Hazel

chemistry
How much ice (in grams) would have to melt to lower the temperature of 355mL of water from 26∘C to 6∘C? (Assume the density of water is 1.0 g/mL.)
December 3, 2014 by Anonymous

chemistry
Methanol burns in oxygen to produce carbon (iv) oxide and water if 9 grams of methanol are used in the combustion process what mass of water is produced
February 12, 2015 by Regina

chemistry
Al2(SO3)3 + 6NaOH 3Na2SO3 + 2Al(OH)3 If this reaction begins with 10 g Al2(SO3)3 and 10 g NaOH, what is the theoretical yield in grams Al(OH)3 and what is the limiting reactant?
February 20, 2015 by violet

chemistry
2.241 g sample of nickel combines with oxygen to produce 2.852 g of metal oxide. Calculate the number of grams of xygen in the metal oxide.
March 17, 2015 by Julie

chemistry
A particular brand of gasoline has a density of 0.737 g/mL at 25 ∘C. How many grams of this gasoline would fill a 13.2 gal tank (1US gal=3.78L)?
September 8, 2015 by cody

Math and science
a rock has a mass of 3000 grams what is the mass in kilograms that's the question we need to know how to be converted or figure this question out in the layman's term
March 10, 2016 by Grace and dad

Chemistry
Make NaCl from NaHCO3 and HCl-Starting with 3.0 grams of NaHCO3-what would be a source of error on yield of purity of NaCl and what modifications could be made?
April 10, 2016 by Lisa

chemistry
How many joules of heat are required to completely covert 85.0 grams of water at 40.0 C to steam at 100C? For water: c = 4.179 J/g C Hfusion = 6.01 kJ/mol Hvap = 40.7 kJ/mol
April 20, 2016 by har

Chemistry
1.What two sets of units can be used to describe density? Why are they interchangeable? ~~~~~ I'm not sure what it means with units? Like grams and such? And what do they mean by interchangeable?
September 6, 2016 by Astral Tellurian

chem
supose 1.25 mol of N2 and 50.0g of O2 are moxied together. a)which one is the limiting reactant? b) what is the maximum mass in grams of NO2 that can be produced from the mixture? N2(g) + 2O2(g)=2NO2(g) ***please just show me how to set up the equations I would work the ...
November 9, 2010 by julia

Chemistry
Given that many laboratory gases are sold in steel cylinders with a volume of 43.8 L, What mass (in grams) of argon is inside a cylinder whose pressure is 17810kPa at 24∘C? I've attempted this problem but I'm not getting the correct answer. Please explain if you can!
November 28, 2014 by Anna

Chemistry; Stoichiometry
Consider the reaction 2Al + 3CuSO4 = Al2(SO4)3 + 3Cu What is the maximum amount of Cu (63.5 g/mol) that could be produced by reacting 20.0 grams of Al (27.0 g/mol) with excess CuSO4? 1. 70.6 g 2. 57.2 g 3. 129 g 4. 31.4 g Consider the reaction 4As + 3O2 = 2 As 2O3 What is the ...
May 6, 2010 by Annalie

need help on conversions
Use the density of water: 1gram/ml= 1g/cm^2 looks like the volume of 1 cm^3 has a mass of one gram. 1 cm3 of water weighs 1 gm. would you help with converting 1cm3 of water to grams
December 14, 2006 by bobpursley

Chemistry
what is the mass of two moles of NaCl? You look up the exact numbers on the periodic table or some other chart. I will use approximations. 1 mol NaCl = 1 Na + 1 Cl = 23 + 35.5 = 58.5 grams. 1 mols NaCl, then, is 2 x 58.5 = ?? g.
February 5, 2007 by Dennis

Chemistry - PLEASE CONFIRM ANSWER.
determine the mass of CO that is produced when 45.6g of CH4 react with 73.2g of O2. 2CH4 + 3O2 ---->2CO + 4H2O nCH4 = 45.6 g/16.05 g/mol =2.84 mol nCO=2.84 mol mCO=n*M =2.84*28.01 =79.5 grams
May 25, 2008 by Nicole

chemistry
Tungsten is a dense metal that is used to make the filaments in incandescent light bulbs. A piece of tungsten has a volume of 5.2 cubic centimeters and a mass of 100 grams. What is the density of tungsten?
September 27, 2010 by Alex

Physics
Ball, with a weight of 200 grams, tied to a string rotates around in a horizontal plane. Period of rotation is 2 seconds. What is the force (in N) which acts on the string? The length of the string is 0.5 meters.
December 8, 2010 by Steven

physics
A cube of lead measuring 1 meter on each side is thrown into the ocean. Determine the buoyant force acting on this mass of lead. The density of lead is 11.4 grams/ cubic centimeter
March 8, 2012 by sierra

Chem
CH4(g)+2O2 arrow CO2(g)+2H2O(1) delta H=-890.3kJ. Calculate delta Hwhen 5 grams of methane react with an excess of oxgen?o i just divide Delta H by 5?
February 24, 2013 by Anonymous

chemistry
A 3.00 Liter tank containing 225 grams of oxygen gas was heated to 100 degrees C. How much pressure must the tank be able to withstand to avoid explosion of the tank?
April 15, 2013 by sarah a

chemistry
Just need help solving this one, please: The grams of fat in one avocado if it has 405 Calories, 13 g of carbohydrate, and 5 g of protein Express your answer using one significant figure. Thanks -MC
February 1, 2014 by mysterychicken

chemistry
how many oxygen atoms are in 1.60g of quartz - SiO2? how do you figure out atoms to grams and visa versa? the weight of 1 SiO2=60.0848g/mol. please help
October 1, 2007 by leo

Chemistry
Two people were given 1.75 g salicylic acid and 2.00 mL of acetic anhydride. If the density of acetic anhydride is 1.0820 g/mL, how many grams of aspirin could they have prepared. Is the answer 4.7 g
November 14, 2008 by George

CHEMISTRY
if 16r of METHANOL are reacted wtih an excess of PBr3, how many grams of CH3Br would be formed if there is a 25% yield? eqn; CH2OH + PBr3 --> CH3Br + H3PO3
February 14, 2010 by ARA

chemistry
Looking up the specifications of an oil online, the spec sheet indicates that the specific gravity of this oil is .93. Does this mean that the oil weights .93 grams / 1 cubic centimeter of oil? Thanks
February 16, 2010 by Chris

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