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September 22, 2014

Search: A gaseous mixture of and contains 36.8 nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 565 ?

Number of results: 38,022

physics
Three moles of nitrogen gas, N2, at 26.8 ◦C are contained in a 35.8 L cylinder. Find the pressure the gas exerts on the cylinder walls. Answer in units of Pa
April 26, 2013 by Anonymous

math
chalk contains 3% of carbon,10%of calcium & 12%of oxygen.find the amount in grams of each of these substancein 1kg of chalk.
July 29, 2011 by sonam

Science
Nitrogen, carbon, water and hydrogen make up more than what percentage of the mass of the human body?
September 8, 2008 by Ruben

Chemistry
What mass of ammonia is produced when 1.73 L of nitrogen (STP)react completely in the following equation? N2 + H3 > 2NH3
April 17, 2012 by Randy

Gas Stoichiometry
What mass of ammonia is produced when 3.08 L of nitrogen (at STP) react completely in the following equation?
May 6, 2013 by Jenny

Chemistry
a) Ammonia, an important source of fixed nitrogen that can be metabolized by plants, is produced using the Haber process in which nitrogen and hydrogen combine. N2(g) + 3H2(g) → 2NH3(g) How many grams of nitrogen are needed to produce 325 grams of ammonia? b)A 0.00100 ...
September 15, 2014 by Uma

Chemistry
Commercial bleach contains 5.25% (by mass) of NaClO in water. It has a density of 1.08 g/mL. Calculate the molarity of this solution. (Hints: assume you have 1 L of solution (mass 1080 g); molar mass of NaClO is 74.4 g/mol)
March 3, 2010 by Drew

chemistry
A 2.45 gram sample of potassium chlorate is heated an the oxygen gas collected. what is the volume of the oxygen at STP. Is the oxygen gas itself 2.45 grams or do I have to subtract something from that?
November 23, 2008 by Anonymous

Chemistry+Singe replacement
Balance the following equations if the reactions will occur. gold + oxygen Au + O2 --> ??????? barium + oxygen Ba + O2 --> ??? bismuth + oxygen --> Bi + O2 --> ??? help please. keep in mind this is single replacement
February 9, 2009 by Chopsticks

Chemistry h/w
Hi, this is my first lab in 2nd semester of chemistry, and im not sure about my answers in the assignment can someone give it a quick look to check them? this is my phase diagram: tinypic. com/view.php?pic=1605yev&s=7 p.s. ignore the lone red dot its supposed to be 38C.. there...
September 21, 2010 by Jessie

chemistry h/w
Hi, this is my first lab in 2nd semester of chemistry, and im not sure about my answers in the assignment can someone give it a quick look to check them? this is my phase diagram: tinypic. com/view.php?pic=1605yev&s=7 p.s. ignore the lone red dot its supposed to be 38C.. there...
September 21, 2010 by Jessie

phycis
A cylindrical tank has a tight-fitting piston that allows the volume of the tank to change. The tank contains 0.5m^3 of air at a pressure of 2*10^5 Pa. The piston is slowly pushed in until the pressure of the air is increased to 2.5*10^5 Pa. If the temperature remains constant...
December 13, 2010 by joann

Alegbra
I have a problem that I need help with can someone show me the steps LiveStock Feed- Soybean meal is 16% protein and corn meal is 9% protein. How many pounds of each shoul be mixed to get a 350-lb mixture that is 12% protein?
February 17, 2011 by Donna

Science
science is the mixture ilearneed the science on the time she give my on fast day me is go for the killer and gave my juck on wag friends like the opportunity go as the preaper good life and good shade
July 6, 2012 by Jane

Science
science is the mixture ilearneed the science on the time she give my on fast day me is go for the killer and gave my juck on wag friends like the opportunity go as the preaper good life and good shade
July 6, 2012 by Jane

AP Chemistry
Analysis of a reaction mixture showed that it had the composition 0.43 mol/L N2, 0.541 mol/L H2, and 0.124 mol/L NH3 at 800 K, at which temperature Kc=0.278 for N2(g) + 3H2(g)<->2NH3(g). Calculate the reaction quotient Qc
November 26, 2013 by Gabriella

chemistry
What mass of sulfur must be used to pro- duce 14.7 L of gaseous sulfur dioxide at STP according to the following equation? S8 (s) + 8 O2 (g) −→ 8 SO2 (g) Answer in units of g
November 12, 2011 by Anonymous

chemistry
A 24L sample of a gas at fixed mass and constant temperature exerts a pressure of 3.0 atm. What pressure will the gas exert if the volume is changed to 16L?
March 16, 2010 by catherine

Chemistry
A balloon contains 0.350 mol of Ar at 5.00°C and 68.0 kPa pressure. What is the volume of the gas?
June 23, 2014 by Robert

physical chemistry
Calculate the equilibrium constant (K) for the ammonia synthesis reaction at 25°C and show how K is related to the partial pressures of the species at equilibrium. Consider that the overall pressure is low enough for the gases to be treated as perfect. N2(g) + 3H2(g) -> ...
November 10, 2010 by KC

Chemistry
If a 8.0mL sample of blood plasma has a mass of 8.223g and contains 1.233g of urea, what is the mass/mass percent concentration of urea in the sample?
February 7, 2013 by Elaine

Physics
Total lung capacity of a typical adult is approximately 5.0L. Approximately 20% of the air is oxygen, as air is 20% oxygen. At sea level and at an average body temperature of 37 C, how many moles of oxygen do the lungs contain at the end of an inflation? n=PV/RT V=5.0L=.005m^3...
November 19, 2009 by ana

science
how many oxygen atoms are in 773.2g of carbon dioxide? and also what is the molar mass of an element where 3.4 moles of the element has a mass of 669.69g? which elent is it?
May 6, 2013 by wardy

partial fractions
(7x^2-16)/(x^2-2x) solve by using partial fraction decomposition. i cant figure out how to do this because after i split up the bottom the A and B dont end up having an x^2 in order to equal the numerator of the original fraction. so confused!
July 20, 2011 by gabs

Math- Partial Fractions
Decompose the following into partial fractions after factoring the denominator as much as possible. Please show some work so I can understand how you did it. 1)x^2/((x-1)(x^2+5x+4)) 2)(3x^3-5x^2+12x+4)/(x^4-16) 3)1/(x^2 (x+1)^2 ) 4)(x+1)/((x^2+1) 〖(x-1)〗^2
April 4, 2013 by Chris

chemistry
A 5.02 L sample of nitrogen dioxide gas is collected at 500°C and 5.00 atm. What is the volume of nitrogen dioxide at standard condition?
August 4, 2010 by Deanna

physics
Consider nitrogen gas, N2, at 27.7°C. What percentage of nitrogen molecules have a speed within 1.00 m/s of the most probable speed?
August 20, 2014 by SUZAN

physics
A horizontal pipe contains water at a pressure of 108 kPa flowing with a speed of 1.5 m/s. The pipe narrows to one-half its original diameter. What are the speed and the pressure of the water when the pipe narrows?
December 7, 2010 by aok

PHYSICS
A copper vat is 10 m long at room temperature (20 degrees C). How much longer it is when it contains boiling water at 1 atm pressure? Air in a balloon does 50 J of work while absorbing 70 J of heat. What is its change in internal energy? A bottle containing 3 kg of water at a ...
February 17, 2011 by Matt

Chemistry
Oxygen gas and water are produced by the decomposition of hydrogen peroxide. If 10.0 mol of H2O2 decomposes, what volume of oxygen will be produced? Assume the density of oxygen is 1.429g/L. 2H2O2= 2H2O+O2
April 19, 2011 by YV

chem
Oxygen gas and water are produced by the decomposition of hydrogen peroxide. If 10.0 mol of H2O2 decomposes, what volume of oxygen will be produced? Assume the density of oxygen is 1.429g/L. 2H2O2= 2H2O+O2
February 3, 2013 by oscar

chemistry
Two liquids of different densities (ρ1 = 1500 kg/m3, ρ2 = 500 kg/m3) are poured together into a 100 L tank, filling it. If the resulting density of the mixture is 800 kg/m3, find the respective masses of the liquids used.
August 29, 2012 by nick

chemisrty
Will 1,1,2, trichloro ethane rotate polarized light if it is cooled to low temperature and trapped in its lowest energy position? Yes, under all circumstances. Yes, but only if it is chiral. No, it will never rotate light. No, there is a racemic mixture present.
June 1, 2013 by Anonymous

Chemistry
1. Mass of flask, boiling chips, foil cap and unknown after cooling reaction 83.350g 2.Mass of flask, boiling chips,and foil cap. 82.657 3. water bath temperature C is 95.0 C 4. Barometric pressure inches of Hg 30.09 5. Accepted molar mass of unknown is 86.2g/moles 6. Volume ...
June 14, 2010 by Anonymous

Chemistry
Mass of flask, boiling chips, foil cap and unknown after cooling reaction 83.350g 2.Mass of flask, boiling chips,and foil cap. 82.657 3. water bath temperature C is 95.0 C 4. Barometric pressure inches of Hg 30.09 5. Accepted molar mass of unknown is 86.2g/moles 6. Volume of ...
June 14, 2010 by Anonymous

Chemistry
A 12 g sample of an unknown compound contains 3.489 g of sodium and 4.870 g of sulfur. The rest is oxygen. Name the compound Thank you!
October 17, 2011 by Mom

chemistry
Hassium (III)oxalate contains 2.25 mol of Carbon atoms. What is the number of moles of oxygen atoms in the sample?
October 25, 2012 by Carina

Maths
Principal - 6000 Rate - 5% Effective Date - May 15 Maturity Date - November 1 Partial Payment Amount - $1500 Partial Payment Date -August 15 Also Answer the following questions: 1. NUMBER OF DAYS BETWEEN EFFECTIVE DATE AND PARTIAL PAYMENT = 2. INTEREST ON PARTIAL PAYMENT DATE...
March 10, 2008 by Kim

science
1. What will happen to the pressure in your tires if the temperature drops 40 degrees over the night? a) Pressure will increase b) Pressure will decrease c) Pressure will not change d) Cannot determine
February 15, 2008 by josh

Projectile physics
The average speed of a nitrogen molecule in air is about 6.70 ✕ 102 m/s, and its mass is about 4.68 ✕ 10-26 kg. (a) If it takes 3.80 ✕ 10-13 s for a nitrogen molecule to hit a wall and rebound with the same speed but moving in an opposite direction (...
February 13, 2014 by Joe

MATH
Ned’s Sheds purchases building materials from Timbertown Lumber for $3,700 with terms of 4/15, n/30. The invoice is dated October 17. Ned’s decides to send in a $2,000 partial payment. By what date must the partial payment be sent to take advantage of the cash discount? (...
August 18, 2013 by ANN

Chemistry
In trial one the mass of silver oxide is .5g. The mass of silver metal product is .431 grams. In trial two the silver oxide=.498 and silver metal=.388. How do you use this information and the conservation of mass to calculate the mass of oxygen that combined with the silver?
September 19, 2010 by mike

intermolecular force
In a mixture of ethanol and water, the strongest intermolecular force present between the two chemicals is ? is it hydrogen bond? yes its hydrogen bonding
January 26, 2007 by krissee

Geometry
Nickles are made from a metal that is a mixture of nickle and copper. About how many nickles can be made if a 1 meter cubed block of this metal is melted down?
June 7, 2011 by Caty

Chemistry
How many grams of Ag2S can be generated from a mixture of 2.48 g Na2S and 3.41 g of AgNO3 given the following unbalanced reaction: Na2S(aq) + AgNO3(aq) → Ag2S(aq) + NaNO3(aq)
February 8, 2012 by Jacob

Chemistry
1.)Find the PH of a solution with 0.20M NH3 with 0.15M of NH4Cl. 2.)Find PH of a solution with a mixture of 200mL of 0.50M HCHO2 and of 100mL of .50M NaCHO2.
May 1, 2012 by Chem help me!

ap chem
Analysis of a reaction mixture showed that it had the composition 0.417 mol/L N2, 0.539 mol/L H2, and 0.127 mol/L NH3 at 800 K, at which temperature Kc = 0.278 for N2(g) + 3H2(g) *) 2NH3(g) . Calculate the reaction quotient Qc .
February 13, 2011 by Anonymous

chemistry
What is the melting point of a mixture of 2.00 lb of NaCl and 12.00 pounds of ice if exactly half of the ice melts? Assume that all the NaCl disolves in the melted ice and that the van't Hoff factor for resulting solution is 1.44.
September 11, 2012 by Wiped

chem 211
If 100.0mL water of at 50.0C is added to 100.0 mL of water at 20.0C. What temperature would the mixture of water reach? Assume the system is perfectly sealed and no heat is lost to the calorimeter or to the outside environment. 2)
November 5, 2013 by beti

Physics
A cylinder contains the helium gas with a volume of 0.1 m3 at a pressure of 220 kPa. The gas is compressed to a volume of 0.02 m3. The process is adiabatic and the specific heat ratio of the gas is 1.66. Determine (a) the pressure in the cylinder after compression; (b) work ...
December 18, 2011 by Dia

chemistry
Would flame tests be useful for detecting metal ions present in a mixture of metal ions? Explain. In some cases, yes. In most cases, no.
May 11, 2007 by Anonymous

chemistry
When 1.70 mol CO2 and 1.70 mol H2 are placed in a 0.850 L container at 395 C, the following equilibrium is achieved: CO2(g) + H2(g) = CO(g) + H2(g) If Kc = 0.802, what are the concentrations of each substance in the equilibrium mixture?
February 25, 2011 by Angie

Math
A chemist needs to mix an 18% acid solution with a 45% acid solution to obtain a 12 liter mixture consisting of 36% acid. How many liters of each acid solutions must be used?
February 17, 2012 by Yakima

organic chem
A mixture of ethyl iodide (b.p. 72.3) and water boils at 63.7 C. What weight of ethyl iodide would be carried over by 1 gm of steam during steam distillation
October 9, 2012 by dananny

Chemistry
An equilibrium mixture of the following reaction was found to have [SO3] = 0.391 M and [O2] = 0.125 M at 600 °C. What is the concentration of SO2? 2 SO2 (g) + O2 (g) ====== 2 SO3 (g) Keq = 4.34 at 600 °C
March 11, 2013 by Amee

Pyhsics
What would be the final temperature of a mixture of 50 g{\rm g} of 17∘C^\circ C water and 50 g{\rm g} of 44∘C^\circ C water? I have no clue where I should even begin please help.
April 10, 2014 by Kimmie

6th grade science project for PsyDAG
Thank You for answering PsyDAG. You asked what my hypothesis was. Here it is--Raising the temperature of the vegetable oil and thyme will increase the velocity of the mixture's movement. So is the question you responded to earlier, or actually late Saturday night correct??
February 13, 2011 by Reed

science
This graph represents the relationship of the pressure and volume of a given mass of a gas at constant temperature. When the pressure equals 8 millimeters of mercury (mmHg), what is the volume, in milliliters (mL)?
February 8, 2012 by Anonymous

Chemistry (heat flow, simple)
Well I know to calculate heat flow you use, q=ms delta t. for this experiment we mixed naoh with hcl into water. the total mass (volume) of the mixture was 100g the temperature change for naoh was 11.7 degrees C and for hcl it was 11.8 degrees C now im looking to calculate ...
March 12, 2010 by Abdullah

math sos
Soybean meal is 14%protien , cormeal is 7% protien . How many pounds of each should be mixed together to get a 280 pound mixture that is 11 % protien? How much cornmeal? How much protien?
February 11, 2009 by tera

Chemistry
calculate the final temperature (once the ice has melted) of a mixture made up of initially of 75.0mL liquid water at 29 degrees Celsius and 7.0 g of ice at 0.0 degrees Celsius
February 23, 2010 by Celine

algebra
What is a reasonable domain and range for this scenario? Water is added to a 30 milliliter solution that is 50% acid. The equation A(X)=15/30+x respresents the concentration of acid,A, in the mixture as x amount of water is added
April 6, 2011 by jjj

Physics
A 669 g sample of water at 83 degrees celsius is mixed with 486 g of water at 23 degrees celsius. What is the final temperature of the mixture? Assume no heat loss to the surroundings.
May 8, 2011 by Maria

chemistry
when sulfuric acid is added to solid sodium chloride and the mixture is heated, hydrogen chloride gas is generated, leaving a solid residue of sodium sulfate
September 27, 2013 by meresa

chemistry
when sulfuric acid is added to solid sodium chloride and the mixture is heated, hydrogen chloride gas is generated, leaving a solid residue of sodium sulfate
September 27, 2013 by meresa

Chemistry
First two hw of 50 that I am trying to get a handle on. Any help would be appreciated. 3.What gaseous substance is driven off of succrose when it is heated? is the answer CO2? 7.What gaseous substance is driven off of succrose when it is reacted with acid? 17. What is the back...
August 8, 2010 by Bobby

pharmacy tech
A certain mixture calls for 6mg of amoxycillin to 15 liters of water How many liters of water would you need for 12mg of amoxycillin?
December 29, 2010 by Robyn

chemistry
if 50 grams of a substance with temperature of 20 degrees C and a specific heat of 2 is mixed with 200 grams of water at 40 degrees C, what will be the equilibrium temperature of the mixture?
February 24, 2011 by kassi

science
if you had a liter container full of marbles and half container full of sand,would a mixture of the two measure 1 1/2 liter?
May 1, 2011 by maryan

Chemistry
When a mixture of 10 moles of SO2 and 15 moles of O2 was passed over a catalyst, 10 moles of SO3 was formed. how many moles of SO2 and O2 did not enter into combination?
June 22, 2012 by Simran

Chemistry
a student separated a 1.50 g sample of sand mixed with salt and obtained 0.70 g of salt and 0.65 g of sand. what percent recovery of the initial mixture was obtained?
June 26, 2013 by LicckkyDude

Physics
Aristotle is sometimes quoted as claiming that a body falls at a speed proportional to its mass. Let us suppose that Aristotle’s experience was based on objects falling in air (with turbulent flow drag) essentially at their terminal speeds. a. If Aristotle were considering ...
May 10, 2011 by Ashley

Physics
Aristotle is sometimes quoted as claiming that a body falls at a speed proportional to its mass. Let us suppose that Aristotle’s experience was based on objects falling in air (with turbulent flow drag) essentially at their terminal speeds. a. If Aristotle were considering ...
May 10, 2011 by Ashley

Physics
Aristotle is sometimes quoted as claiming that a body falls at a speed proportional to its mass. Let us suppose that Aristotle’s experience was based on objects falling in air (with turbulent flow drag) essentially at their terminal speeds. a. If Aristotle were considering ...
May 10, 2011 by Ashley

Chemistry
A sample of iron weighing 15.0 g was heated with potassium chlorate (KClO3) in an evacuated container. The oxygen generated from the decomposition of KClO3 converted some of the Fe to Fe2O3. If the combined mass of Fe and Fe2O3 was 17.9g,calculate the mass of Fe2O3 formed and ...
August 22, 2013 by Francis

chemistry
A sample containing 0.0500mol of Fe2(SO4)3 is dissolved in enough water to make 1.00L of solution. This solution contains hydrated SO4 2- and Fe(H2O)6 3+ ions. The latter behaves as an acid: Fe(H2O)6 3+ --> Fe(H2O)5OH 2+ + H+ a) Calculate the expected osmotic pressure of ...
February 16, 2011 by Chris

chemistry
in trial one the mass of silver oxide is .5g. The mass of silver metal product is .431 grams. In trial two the silver oxide=.498 and silver metal=.388. Use the conservation of mass to calculate the mass of oxygen that combined with the silver
September 19, 2010 by kelly

science
How do i seperate the mixture of zinc oxide and copper oxide to obtain pure copper oxide
August 30, 2013 by myke

atmospheric pressure
How many moles of gas must be forced into a 3.9 ball to give it a gauge pressure of 9.8 at 25? The gauge pressure is relative to atmospheric pressure. Assume that atmospheric pressure is 14.5 so that the total pressure in the ball is 24.3 . Express your answer using two ...
November 19, 2012 by Anonymous

Physics
Read the activity 2-1:Force and Pressure in the lab manual (pages 167-168). As described in the manual, consider a 10 cc syringe is connected to a 50 cc syringe. Information of the syringes are as follows: (mass of 10 cc piston) = 16 g (mass of 50 cc piston) = 60.6 g (diameter...
November 12, 2009 by Ellie

Chem
Could someone please walk me through step by step on how to do this. Propane (C3H8) burns in oxygen to produce carbon dioxide and water. C3H8(g) + 5 O2(g) 3 CO2(g) + 4 H2O(g) Calculate the mass of CO2 that can be produced if the reaction of 48.2 g propane and sufficient oxygen...
October 7, 2010 by Jennifer

chemistry
If 40.0 g of water at 70 degrees C is mixed with 40.0 g of ethanol at 10.0 degrees C, what is the final temperature of the mixture? How does one go about solving this problem? I found the specific heat of water and ethanol, but now what?
October 23, 2011 by TheQuestion

chemistry
25.6 {\rm mL} of ethanol (density =0.789 {\rm g}/{\rm mL}) initially at 8.0^\circ {\rm C} is mixed with 39.5 {\rm mL} of water (density = 1.0 {\rm g}/{\rm mL}) initially at 23.1^\circ {\rm C} in an insulated beaker. Assuming that no heat is lost, what is the final temperature ...
February 22, 2012 by MD

Chemistry
2C2H6+7O2=4CO2+6H2O how many moles of H2O are produced when a mixture of 0.427 moles of O2 and 0.150 moles of C2H6 is burned, iv already found moles of H2O for them separately.
March 17, 2013 by Angela

Math
If a mixture of 24 lb. of cement, 48 lb. of sand, and 63 lb. of gravel is needed to make 1 cubic foot of concrete, how many pounds of sand are needed to pour a pool deck of 156 cubic feet?
April 30, 2014 by Rhett cowley

Physical Science
The physical properties of ice are different from the physical properties of dry ice (frozen carbon dioxide). But the physical properties of gaseous water vapor and the physical properties of gaseous carbon dioxide are the same. Why? A.) The valence electrons are more tightly ...
October 17, 2011 by Anonymous

chemistry
What mass of ammonia is produced when 1.48 L of nitrogen (at STP) react completely in the following equation? N2 + 3H2 --> 2NH3
November 10, 2013 by B

pharmacy
A CERTAIN MIXTURE CALLS FOR 6MG OF AMOXYCILLIN TO 15 LITERS OF WATER.? HOW MANY LITERS OF WATER WOULD YOU NEED FOR 12MG OF AMOXYCILLIN?
August 15, 2010 by Mely

chemistry
1. State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it?
September 14, 2010 by Rupali

science
if you add 100mL of water at 20 degree celisus to 200mL of water at 20 degree celisus what does the thermal energy do for the combined mixture?
March 4, 2012 by Colton

math
A certain mixture calls for 6mg of amoxycillin to 15 liters of water. How many liters of water would you need for 12mg of amoxycillin?
September 15, 2012 by kayla

math
In a certain recipe 2 cups of orange juice is added to 7 cups of water. How many cups of juice is required to make 36 cups of the mixture?
October 18, 2013 by Anonymous

Chemistry
Please!!! its extremely urgent. i do not need answers, only how to do it A sample of nitrogen gas (N2) kept in a container of volume 10.1 L and at a temperature of 20.3°C exerts a pressure of 3.1 atm. Calculate the number of grams of gas present. Round to one decimal place, do...
October 17, 2011 by Javier

college algebra word problem
A goldsmith has two alloys that are different purities of gold. The first is 3/4 pure and the second is 5/12 pure. How many ounces of each should be melted and mixed in order to obtain a 6 oz mixture that is 2/3 pure gold?
February 25, 2009 by megan

chemistry
50.00 mL of 1.0 M HCl and 50.00 mL of 1.0 M NaOH are mixed. The temperature is observed to increase by 10.0 degrees C. How much energy (in J) was absorbed by the calorimeter? Assume a density of the reaction mixture of 1 g/mL. Specific heat of the solution is 5.00 J/g/degree C...
May 27, 2010 by hongkong

Math-Algebra
DMF Feeds has two different types of cattle feed containing crude protein in the amount of 45% and 20% respectively. How many of each type must a feed lot manager mix together to obtain 10000lbs of a mixture that is 25% protein?
February 4, 2014 by McKenna Louise

FLUID MECHANICS
Water flows at a rate of 0.040 m3/s in a 0.15 m diameter pipe that contains a sudden contraction section to a 0.06 m diameter pipe. Determine the pressure drop across the contraction section. Determine also the pressure difference due to the losses.
May 3, 2014 by ANNA

physics
A hydraulic lift has two connected pistons with cross-sectional areas 5 cm2 and 350 cm2. It is filled with oil of density 740 kg/m3. a) What mass must be placed on the small piston to support a car of mass 1400 kg at equal fluid levels? 20 OK HELP: The pressure is constant at ...
November 7, 2010 by Taylor

Chemistry
In the qualitative test for nitrate anion, the test goes like this: - Add dilute sodium hydroxide, then add a little aluminium powder. Warm. Why do we need to warm the mixture?
January 22, 2009 by janice

chemistry
A drop of starch is added to a mixture of 97.30 ml of 0.1096 M I2 and 97.20 ml of 0.1098 M Na2S2O3. I've already calculated the moles of I2 to be 10.66408 moles and the moles of Na2S2O3 to be 10.67256. Will the solution be blue even if their moles aren't the same?
February 5, 2009 by jean

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