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October 31, 2014

Search: 14 carat gold has a purity of 58.3%. How many moles of gold are in 154 grams of 14 carat gold? Answer in

Number of results: 11,134

chemistry
If the rocket engine contains 1500.0 grams of H2O2 and an excess of N2H4, what volume of water vapor will be produced when the rocket fires up to a temperature of 540C and a pressure of 1.2atm?
July 24, 2012 by Big Trav

College Chemistry
Using the accurate concentration that you measured in Part A (which is 14.77 ml), calculate the mass of HCl (in grams) present in a 15.00-mL sample of the acid solution, using proper dimensional analysis
December 2, 2012 by Alex

Chemistry 3A
C2H2(g)+ 5/2o2(g)-> 2Co2(g)+ H2o(g)+ 1255.8KJ how many grams of C2H2 are reacted when 310 KJ of heat are released? I left the oxygen (O) lowercase in the equation so it does not get mixed up with zero.
December 10, 2012 by Gurjot

Chemistry
When 50.0g of silicon dioxide is heated with an excess of carbon 32.2 g of silicon carbide I'd produced. SiO2(s) + 3C(s) → SiC(s) + 2CO(g) A. What is the percent yield of this reaction? B. How many grams of CO gas are made?
January 7, 2013 by Gloria

Chemistry
Zinc metal reacts with hydrochloric acid according to the following equation: Zn + 2HCl yields ZnCl2 + H2. How many grams of hydrogen gas can be obtained if 50.0 g of zinc react completely?
March 11, 2013 by Raymond

math
A balance scale is perfectly balanced with two blocks on one side and ten weights on the other. If each weight equals 2.0 grams, how much does one block weigh?
March 14, 2013 by Anonymous

Chemistry
What mass, in grams, of sodium carbonate is required for complete reaction with 8.35g of nitric acid to produce sodium nitrate, carbon dioxide, and water? [Show work]
February 12, 2014 by Melissa

chem
What is the maximum mass of S8 in grams that can be produced by combining 87.1 g of each reagent? Do not include units in your answer. Answer to three significant figures. 8SO2 + 16H2S → 3S8 + 16H2O
August 1, 2014 by kate

science
As mentioned before, our asteroid is in the shape of a sphere and has a mass of 2000 kilograms. Determine the density (in grams per cubic centimeter) of this asteroid if its diameter is known to be 1.2 meters.
October 11, 2014 by stacy

Chemistry
a) Tetraphosphorus (P4), commonly known as white phosphorus, forms different compounds with chlorine (Cl2) depending on the amount of chlorine present. If chlorine is limited, phosphorus trichloride (PCl3) is formed. If there is an excess of chlorine, phosphorus pentachloride...
September 10, 2014 by Morgan

Chemistry
Answer the following question about copper (II) sulfate pentahydrate: a)how much water (in g) is there in 10.0 g of the compound listed above? b)If you needed 2.50g of CuSO4 for a reaction but only had CuSO4 * 5H2O available, how many g would you need to use to get the same ...
May 2, 2010 by Jack

Chemistry
The reaction 2NO + Cl2 <==> 2NOCl has Kc= 210 what is the equilibrium concentration of NO in moles per liter given the following Cl2= .46 NOCl= .43M at equilibrium. So far all ive gotten is 210= [.43]^2/[.46][NO]^2 where do I go from here please
March 12, 2008 by Lauren

Chemistry
If 560.70 g of water (22degrees) is displaced, what volume of gas displaced it? Any help would be greatly appreciated. I am thinking about using PV=NRT, but do I assume the value of the pressure is 1. Also using 560.7 do i determine the amount of moles?
September 26, 2008 by George

Chemistry-Please help
2C8H18(g)+25O2(g)+16CO2(g)+18H2O(g) 0.290mol of octane is allowed to react with 0.600mol of oxygen.The limiting reactant is Oxygen. How many moles of water are produced in this reaction? After the reaction, how much octane is left?
October 5, 2009 by Rose

Chemistry-Please help
2C8H18(g)+25O2(g)-->16CO2(g)+18H2O(g) 0.290mol of octane is allowed to react with 0.600mol of oxygen.The limiting reactant is Oxygen. How many moles of water are produced in this reaction? After the reaction, how much octane is left?
October 5, 2009 by Rose

chemistry
How would I calculate the molarity of the resulting solution if 25.0mL of 1.50 M HCL solution is diluted to 500 mL. I know you have to change the milliliters to liters by dividing by 1000 and I know that M= Moles of Solute/Liters of Solute but after that I'm lost. Please help!
July 1, 2011 by Daniel

Chemistry
(a) Calculate the molarity of a solution that contains 0.175 mol ZnCl2 in exactly 150 mL of solution. (b) How many moles of HCl are present in 35.0 mL of a 4.50 M solution of nitric acid? (c) How many milliliters of 6.00 MNaOH solution are needed to provide 0.325 mol of NaOH?
October 31, 2011 by Anon

chemistry
Assuming that the total volume does not change after 0.200 g of KCl is added to 1.0 L of a saturated aqueous solution of AgCl, calculate the number of moles of Ag+ ion in the solution after equilibrium has been reestablished. For AgCl, Ksp = 1.8 1010
November 16, 2011 by Stacy

Chemistry
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of is present in a helium-oxygen mixture having a density of 0.498 at 25 and 721 ?
October 7, 2012 by Ayesha

physic
four moles of gas are contained in 2 litre vessel at the temperature of 200c at a pressure of 10atm.the gas is allowed to expand to anew volume of a 4litres ,but at the same time maintening the original temperature.what is the new pressure?
April 26, 2013 by Anonymous

Chemistry
A student ran the following reaction in the laboratory at 651 K: 2 NH3(g) N2(g) + 3 H2(g) When she introduced 8.75E-2 moles of NH3(g) into a 1.00 Liter container, she found the equilibrium concentration of H2(g) to be 0.119 M. Calculate the equilibrium constant, Kc, she ...
November 19, 2013 by Jessica

Chemistry
A 500 mL metal cylinder holding 0.100 moles of helium gas is known to rupture at a pressure of 10 atmospheres. At what temperature, in C, will the container fail? Here is what I came up with: T= (1.00mol x 0.0821 LxATM/KxMOL) / 10atm x 0.5L =0.01642K Convert to C: 0.01642K - ...
April 25, 2011 by Thao

Chemistry
I need help the question is Convert 25 x 10 to the 25th molecules of CO2 to grams of CO2. I know that one molecule of CO2 is 44.01 g but the answers are .106g,9.44g,1.8x10^4 g, and 2.5 x 10^4 g I dont get it can anyone help me!
April 11, 2008 by Tiffani

chemistry
The pKa of HEPES is 7.55 at 20 degrees C, and its MW is 238.31. Calculate the amounts of HEPES in grams and of 1.0 M NaOH in milliliters that would be needed to make 300 mL of 0.2 M HEPES buffer at pH 7.2.
September 30, 2009 by Shameca

chemo
How much heat (in kJ) does it take to melt 28.4 grams of ice at 0 C and raise the temperature of the resulting water to 25 C? Heat of fusion 334 J/g, Specific heat 4.184 J/g C ?
October 29, 2013 by melissa

Math
Eric has two rock samples. One has a mass of 600 grams and the other has a mass of 1 kg. He recorded the total mass as 7 kg. What did he do wrong? What is the correct answer?
March 4, 2014 by Ann

English - Please correct this.
In both Midnights Children and The God of Small Things, idiosyncratic capitalizations are used abundantly in order to convey a deeper meaning from certain words in the text. This technique is employed throughout both novels in order to bring attention to the special ...
April 6, 2008 by Student

Chemsitry 2
a piece of nickel wire has a diameter of 0.568. if the nickel has a density of 8.90g/cc, how long( in meters) should you cut a piece of wire to obtain 0.0234 moles of nickel?
September 12, 2011 by Smarth

chemisty
The pressure of a gas has increased from 300 kPa to 600 kPa. The volume of the container has not changed, and the number of moles of the gas has not changed. The temperature of the gas has _____.
April 13, 2011 by Anonymous

Chemistry
Sulfur and fluorine react in a combination reaction to produce sulfur hexafluoride: S (s) + 3F2 (g) SF6 (g) What is the minimun number of moles of fluorine gas needed to completely react with 16 g sulfur? a. 1 b. 1.5 c. 2 d. 3 e. 6
November 1, 2009 by Courtne

Chemistry
A solution contains an unknown amount of dissolved calcium . Addition of 0.112 mole of K3PO4 causes complete precipitation of all the calcium. How many moles of calcium were dissolved in the solution?
May 14, 2011 by Katie

CHEM, please help!
A 11 mL sample of a solution of AlBr3 was diluted with water to 23 mL. A 15 mL sample of the dilute solution was found to contain 0.045 moles of Br-. What was the concentration of AlBr3 in the original undiluted solution? answer is 2.09 but i cant get it.
February 16, 2012 by Kate

chemistry
Solid borax dissolves in water according to the equation: Na2B4O7 10H2O(s) 2Na+ (aq) + B4O5(OH)42(aq) + 8H2O(l) The sign of Ssys will be A. positive B. negative because there are A. more B. less moles of products generated. i've tried solving this problem and i think its ...
April 7, 2008 by david

chemistry,
in analyzing household bleach. I have a flask that contains 10.00 mL diluted bleach + 0.4g KI + 20 mL distilled water and 20 drops of 2M HCl. To that I titrated 30.60 mL Na2S2O3 and I need to calculate the number of moles of NaOCl reacted. This is what I was thinking.. ...
April 10, 2007 by amy

Chemistry
a) Tetraphosphorus (P4), commonly known as white phosphorus, forms different compounds with chlorine (Cl2) depending on the amount of chlorine present. If chlorine is limited, phosphorus trichloride (PCl3) is formed. If there is an excess of chlorine, phosphorus pentachloride...
September 10, 2014 by Morgan

chemistry
a) Tetraphosphorus (P4), commonly known as white phosphorus, forms different compounds with chlorine (Cl2) depending on the amount of chlorine present. If chlorine is limited, phosphorus trichloride (PCl3) is formed. If there is an excess of chlorine, phosphorus pentachloride...
September 10, 2014 by Morgan

Stiochiometry
Carbon dioxide is released into the air from the combustion of octane (C8H18). How much octane will you need to get 5.00 moles of carbon dioxide? What is the mass of the octane?
January 31, 2008 by Chelsea

AP Chemistry
For the reaction ? C6H6 + ? O2 ↽⇀? CO2 + ? H2O a maximum of ? moles of CO2 could be formed from 6.38 mol of C6H6 and 6.03 mol of O2. Answer in units of mol
September 4, 2012 by Rafael

AP Chemistry
For the reaction ? C6H6 + ? O2 ↽⇀? CO2 + ? H2O a maximum of ? moles of CO2 could be formed from 6.38 mol of C6H6 and 6.03 mol of O2. Answer in units of mol
September 4, 2012 by Rafael

AP Chemistry
For the reaction ? C6H6 + ? O2 ↽⇀? CO2 + ? H2O a maximum of ? moles of CO2 could be formed from 9 mol of C6H6 and 2.81 mol of O2. Answer in units of mol
September 19, 2012 by Matt

chemistry
A balloon of methane gas, CH4, has a temperature of -2 degrees celcius and contains 2.35g of the gas. What is the temperature in kelvin and how many moles of gas does the balloon contain?
May 4, 2014 by darleen

Chemistry
What is the molarity of HCL if it takes 16.5 mL of 0.100 M NaOH to titrate 10.0 mL of HCl? HCl + NaOH -> H2O + NaCl molarity = moles of solute/liters of solution
September 18, 2014 by Selena

Chemistry Help Please
Titration of a Sample of Household bleaches: The oxidizing agent in a household bleach is determined by placing 100 mL of distilled water in a 250 mL Erlenmeyer flask and adding 10 mL of the 10% (w/w) KI solution, swirling the contents of the flask to mix the solutions. Add an...
October 22, 2008 by Sara

chem
when water is added to solid calcium carbide, CaC2, acetylene gas,C2H2,and calcium hydroxide,Ca(OH)2, are produced. how many moles of calcium carbide are needed to completeley react with 5.00 * 10^22 water molecules?
April 19, 2010 by 6784

chemistry
If you react 25.25 g of Na2CO3 with 50.0 mL of 6.0M HCl, answer the following questions: Na2CO3 + 2 HCl -> 2 NaCl + H2O + CO2 question: a) How many moles of HCl do you need to react completely with the 25.25 g of NaCO3? b) What is limiting reagent?
September 29, 2010 by Sarah

Chemistry
How many atoms of mercury are present in 5.4 cubic cm of liquid mercury? The density of mercury is 13.55g/cc. mass Hg = volume x density Then convert to moles. Then remember there are 6.022E23 atoms for every mole. I still don't get how to do this! HELP ME!!!
October 27, 2010 by Jessica

chem
CO2 and NH3 combines together to form CH4N2O and H20. What is the mass of NH3 that would be needed to make 2 moles of CH4N2O. Balanced equation is CO2+2NH3-->CH4N2O+H2O
October 26, 2012 by chemdummy08

Question
hi, so i just made a model of an aspirin tablet,and i was wondering if anyone could give me an estimate on how many grams it would be? The diameter is around 23inches. it doesnt have to be exact, i just need a guess. thanks
January 15, 2009 by Mae

Chemistry
Assuming complete dissociation of the solute, how many grams of KNO3 must be added to 275 mL of water to produce a solution that freezes at -14.5 C? The freezing point for pure water is 0.0 C and Kf is equal to 1.86 C/m. * Use Tf = Kf*i*m
May 28, 2010 by Jaden

Chemistry
What is the maximum weight (in grams) that 15 party balloons, each filled with 2 L of helium, can lift at STP? You can assume the weight of the balloon rubber is negligible and the outside air can be treated as pure nitrogen.
October 17, 2010 by Erika

chemistry- thank you
What is the maximum weight (in grams) that 15 party balloons, each filled with 2 L of helium, can lift at STP? You can assume the weight of the balloon rubber is negligible and the outside air can be treated as pure nitrogen.
October 31, 2010 by Anthony

Chemistry
How many grams of aspirin (C9H8O4) are required to react with exactly 29.40 mL of a 0.02400% w/w solution of sodium hydroxide (NaOH)? What would the consequences be in 0.01200% w/w solution was used instead? Thanks for any help - no idea how to proceed.
January 18, 2011 by Che

chemistry
How many grams of ethylene glycol, HOCH2CH2OH, are present in 2.6 gallons of a 4.61 m solution with a density of 1.88 g/mL? i think that this is a dimensional analysis type of question. 1 gal ~ 3485.41 ml. i just need help with the set up, i think...
May 11, 2011 by Myra

Chemistry
What mass, in grams, of oxygen gas (O2) is contained in a 10.5 liter tank at 27.3 degrees Celsius and 1.83 atmospheres Trouble figuring out what formula to use to get the answer...want to understand how to get the right answer
July 23, 2011 by Anonymous

chemistry
Carbonates react with acids to form a salt, water and carbon dioxide gas. When 25.4 g of calcium carbonate are reacted with sufficient hydrochloric acid, how many grams of calcium chloride will be produced?
April 25, 2012 by Lau ra

Chemistry
How many grams of formic acid, HCOOH, must be added to 0.270L of 0.180M sodium formate, HCOONa, to yield a buffer solution with a pH of 4.20? Assume no volume change. Ka of HCOOH= 5.010^-4
April 30, 2012 by Kev

chem ll
How many grams of formic acid, HCOOH, must be added to 0.270L of 0.180M sodium formate, HCOONa, to yield a buffer solution with a pH of 4.20? Assume no volume change. Ka of HCOOH= 5.010^-4
April 30, 2012 by Cayla

Physics
a 2 centimeter diameter ball of 50 grams rolls at constant velocity across a table. it takes 4 seconds to travel 3 meters. Sketch graph of horizontal position, velocity and acceleration.
December 5, 2012 by Tan

math, statistic
the average of the hemoglobin reading for a sample of 20 teachers was 16 gram per 100 milliliters, with a sample standard deviation of 2 grams. find the 99% confidence interval of the population mean.
June 14, 2013 by nurul

Chemistry
Carbonates react with acids to form a salt, water and carbon dioxide gas. When 22.1 g of calcium carbonate are reacted with sufficient hydrochloric acid, how many grams of calcium chloride will be produced?
February 28, 2014 by Doreen

chemistry-conversion
when converting micromoles to moles: the way i do it is this way: 1 micromole X 1/10^-6 = 1X10^6 mole. lately i have been seeing it done this way: 0.000001 and you just move the decimal point over to the right 6 place to get 1 mole. these are different answers. which is correct?
March 3, 2008 by stew

Chemistry
If 0.720 mol of gaseous Cl2 and 390 mL of 0.641 M aqueous NaBr are reacted stoichiometrically according to the balanced equation, how many moles of gaseous Cl2 remain? Round your answer to 3 significant figures. 2NaBr(aq) + Cl2(g) → 2NaCl(aq) + Br2(l)
May 21, 2009 by Julie

physics
Three moles of an ideal gas are compressed from 5.5*10^-2 to 2.5*10^-2 m^3. During the compression, 6.1*10^3J of work is done on the gas, and heat is removed to keep the temperature of the gas constant at all times. Find the temperature of the gas. Can anyone please give me ...
March 2, 2008 by Stella

PHYSICS
Three moles of an ideal gas are compressed from 5.5*10^-2 to 2.5*10^-2 m^3. During the compression, 6.1*10^3J of work is done on the gas, and heat is removed to keep the temperature of the gas constant at all times. Find the temperature of the gas. Can anyone please give me ...
March 2, 2008 by sTELLA

chemistry
If a solution is diluted, say by adding 100ml of solvent, does the number of moles of solute change? Does the concentration increase, decrease, or stay the same? i think it depends on what the solvent is, for example if its water then the concentration would decrease?? please ...
April 10, 2008 by david

chemistry
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles)of He(g) is present in a helium-oxygen mixture having a density of 0.538g/L at 25celsius and 721mmHg ?
September 26, 2008 by tomi

chemistry
If the molar mass of ASA is 180.2 g/mol, how many moles of ASA were stated by rhe manufacturer to be present in the tablet tested? (Manufacturer stated 325mg Set up as Conversion factor) Can someone please show me ho to work it out?
April 20, 2009 by Liz

chemistry
Suppose a student diluted and titrated a bleach unknown. A single titration was performed which required 14.42 mL of 0.100 M Na2S2O3. The density of the original, undiluted bleach unknown was 1.042 g/mL. calculate the number of moles of ClO- in the sample titrated.
October 27, 2013 by Morgan

Chemistry (Check)
classify each of these statements as always true, sometimes true, or never true. __ST___11)The unit of a conversion factor must cancel. __AT___12)the conversion factor for changing grams and milligrams is 1g/1000mg ___ST__13)multiple conversions factors can be used to solve ...
January 23, 2007 by Bryan

Chemistry
You wish to make a 0.200 M solution of NiSO4 (aq). How many grams of NiSO4 * 6H2O should you put in a 0.500 L volumetric flask? The answer is 26.3 g NiSO4 * 6H20 but I am not sure how to get there.
October 20, 2009 by Kyle

chemistry
What would be the pH of a solution of hy- poiodous acid (HOI) prepared by dissolving 144 grams of the acid in 200 mL of pure water (H2O)? The Ka of hypoiodous acid is 210−11 1. 7 2. 10 3. 13 4. 5 5. 1
February 25, 2010 by hello

Chemistry
carry out the following conversions.Enter your answer in scientific notation a)232 amu to grams (b)135 amu to kilograms (c)3.03 amu A to meters (d)3.19 A to nanometers
September 7, 2014 by Abdul

chemistry
A solution is prepared by mixing 4.62 grams of potassium hydroxide in 1.00 L of water. After that, 250.0 mL of a 0.100 M solution of HCl is added to the solution. What is the resulting pH of the final mixture?
October 9, 2014 by Acrinogy

Physical sciences
Copper reacts with silver nitrate according to the equation: Cu(s) + 2AgNO3(aq)= Cu(NO3)2(ag) +2Ag(s). If 0.50mol of copper is added to 1.5mol of silver nitrate , which is the limiting reagent and how many moles of silver are formed
June 17, 2013 by Tersia Malatji

Chemistry
How do I find the concentration of the excess reagent? I already have the moles of excess reagent. I'm stuck because I don't know how to find the volume of excess (I'm not given a density).
February 4, 2010 by Stuck

chemistry
A sample of carboxylic acid is added to 50.0 mL of 2.27 M NaOH and the excess NaOH required 28.7 mL of 1.86 M HCl for neutralization. How many moles of NaOH reacted with the carboxylic acid?
November 11, 2010 by Ali

chemistry
In a certain compound of copper and oxygen, a sample weighing 0.5424 g contains 0.4831 g Cu. How many moles of copper are in the sample and the mass of oxygen in the sample?
March 31, 2011 by cook

math
Mr. Mole determined that 2/3 of the students in his math class had pased the final exam. If 16 students passed the test, how many students are in Mr. Moles class?
July 21, 2012 by essence

chemestry
Based upon the previous two questions, consider the magnesium nitride addition reaction again. This time, suppose you start with 10.0 g of each reactant. What is the maximum number of MOLES of Mg3N2 that could be produced in this case? Remember that the reactant that runs out ...
November 17, 2010 by cristy

Chemistry
a) Tetraphosphorus (P4), commonly known as white phosphorus, forms different compounds with chlorine (Cl2) depending on the amount of chlorine present. If chlorine is limited, phosphorus trichloride (PCl3) is formed. If there is an excess of chlorine, phosphorus pentachloride...
September 10, 2014 by Morgan

Chemistry
Can u tell me the practical details of how you would prepare 0.5mol/dm3 hydrochloric acid solution from a stock of 34% (w/w) with a relative density of 1.18. Figure the number of moles per liter of the concentrate. Say is is 17 for example sake. You want a dilution of 17/.5 or...
April 13, 2007 by Kimoya Davy

Chemistry 101
A solution containing 83.100 g of sodium hydroxide [molar mass = 40.0 g/mol] was neutralised using phosphoric acid. Calculate the moles of sodium phosphate formed (assuming that the reaction goes to completion). Give your answer to three significant figures. I'm not sure the ...
October 13, 2014 by Drew

Setting up a chem problem
Magnesium reacts with water in the equation, Mg+2HO-->Mg(OH)+H. You have 8.1 g of magnesium available. This means you will need ___ g of water to use all the magnesium. This seems sorta simple, but how can i set it up? These are stoichiometry problems. They can be solved...
January 18, 2007 by Briana

Chemistry
what is the final temp of the combination when 50 grams of chromium at 15 degrees celcius is added to 25 milliliters of water at 45 degrees celcius?
August 7, 2010 by Nick

college
If 75 grams of ice at 0 degrees celsius were added to 1.5 Liters of water at 75 degrees celsius, what would be the final temperature?
November 4, 2010 by Anonymous

chemistry
if .55 grams of a gas dissolves in 1 liter of water at 20 kPa of pressure, how much will dissolve at 110 Kpa of pressure?
March 28, 2011 by Anonymous

chemsitry
Calculate the mass in grams of sodium bromide, NaBr, are needed to prepare 250.0 mL of a solution of sodium bromide that is 3.50% (m/v).
March 20, 2011 by allen

Chemistry
How much heat is required to raise 75 grams of 0 degree Celsius ice to 135 degree Celsius steam?
March 31, 2011 by Lizabeth

chemistry
calculate the heat released for 5.00 grams if H2O cooling from 99 degrees celcius to 22 degrees celcius in joules and calories
April 3, 2011 by Meagan

chemistry
What is the mole fraction of sulfuric acid in a solution made by adding 3.4 grams of sulfuric acid to 3500 mL of water?
April 28, 2011 by amber

Chem 100
at 1 atm how much energy is required to heat 67 grams of H2O(s) at -22 degrees C to H2O(g) at 159 degrees C
May 1, 2011 by Kristin

Chemistry
How many grams of formaldehyde, H2CO, are in 500 ml of a 40% solution of formaldehyde in water? (Assume for this problem that the density of the formalin solution is 0.98 g/ml)
September 19, 2011 by Kelsey

Chemistry
Calculate the grams of KHP needed to react with 25.2 ml of 0.10M KOH if the reaction is? KOH+KHP -----> K2P + H2O
October 3, 2011 by Dante

chemistry
Have 250 mL of a 0.80 M solution of silver nitrate AgNO3 dissolved in water. how many grams of AgNO3 does the solution contain
October 18, 2011 by mary

Chemistry
Given HCL + SrO --- SrCL2 + H20 Calculate the mass of HCl in grams that would react with 4.85 kg SrO.
November 17, 2011 by nms

Chemistry
How many more grams of Li SO4 can you dissolve in 250g of water at 10.0 degrees C than at 50 degrees C. The solubility is 35.0 at 10 degrees and at 50 degrees C it is at 32.5. Thanks DR Bob for all your help.
November 21, 2011 by John

Math Grade 3
A Banana Has 27 Grams Of Carbohydrates. It Has A Total Of 121 Calories. How Many Of Its Calories Come From Sources Other Than Carbohydrates?
November 30, 2011 by Hong

Chemistry
I have a 500mL flask, and I want to prepare 500mL of NaOH solution with a pH of 13.00. How many grams of Na OH do I need to put in the flask to arrive at this pH?
December 8, 2011 by Brandy

Science
How many grams of barium carbonate can be produced from mixing 100.0 mL of 0.20M barium nitrate and 50.0 mL of 0.30M potassium carbonate?
March 14, 2012 by Mallory

chemistry
Nitrogen-13 has a half-life of 10 minutes. Given a starting mass of 2.00 g of nitrogen-13, how many grams will remain at the end of 30 minutes?
June 19, 2012 by drew

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