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November 28, 2014

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chemistry calorimetry
how can i get the mass of a liquid when i'm given the heat enrgy that is added, and the specific heat of the liquid to which is added, plus the increase in temperature. q = mass x specific heat x (Tf - Ti) q is heat in Joules. mass in grams specific heat in J/g*C Tf = final T ...
January 18, 2007 by claudia

chemistry
A solution of sodium nitrate, NaNO3, in 200 g of water is saturated at 50C. If the solution is cooled to 20C, how many grams of sodium nitrate will precipitate from the solution?
September 13, 2010 by KSLE

Chem molarity
A beaker contains 100 grams of 1.20 M NaCl. If you transfer 50% of the solution to another beaker, what is the molarity of the solution remaining in the first beaker?
March 1, 2011 by Toni Jones

Chemistry
A 70 piece of ice at 0 is added to a sample of water at 6. All of the ice melts and the temperature of the water decreases to 0. How many grams of water were in the sample?
September 8, 2012 by Sherice

chemistry
a 42 piece of ice at 0.0 C is added to a sample of water at 8.0 C. all of the ice melts and the temperature of the water decreases to 0.0 C. how many grams of water were in the sample.
January 30, 2014 by Linda

Chemistry
NaHCO3 + HCl = NaCl + H2O + CO2 The there are .0489 moles of CO2, and HCL is 6M. find the amount of HCL in mL and the grams of NaHCO3
September 7, 2014 by Joe

Chemistry
What conversion factor would you use to convert between these pairs of units? a)minutes to hours b)grams to milligrams c) cubic decimeters to milliters. There are 60 minutes in 1 hour. There are 1000 mg in 1 g. There are 1000 cubic centimeters in 1 cubic decimeter AND 1 cc = 1...
January 25, 2007 by Bryan

chemistry
A 25g sample of a compound composed of Carbon, Hydrogen, and Oxygen was combusted. 55grams of Carbon Dioxide and 30 grams of water were collected. A) What is the empirical formula of the compound? B) If the compound has a molar mass of 120g what is the molecular formula?
October 8, 2010 by Olga

CHEMISTRY
When NO(g) (0.06623 mol/L) and 422.6 grams of Cl2(g) in a 180.0 L reaction vessel at 565.0 C are allowed to come to equilibrium the mixture contains 3.096 mol of NOCl(g). What is the concentration (mol/L) of NOCl(g)? 2NO(g)+Cl2(g) = 2NOCl(g)
April 19, 2011 by ANNA-MARIE

Chemistry
Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 1.890-g sample of Mg metal is added to 125.0 mL of a 4.00 M HCl solution, and the reaction goes to completion. How many grams of H2 are formed?
September 13, 2011 by Mike

Chemistry
Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 1.890-g sample of Mg metal is added to 125.0 mL of a 4.00 M HCl solution, and the reaction goes to completion. How many grams of H2 are formed?
September 13, 2011 by Mike

Gen Chem
ignition of mgnh4po4*6h2o produces nh3, h2o and magnesium pyrophosphate, Mg2P2O7. complete and balance the equation for this reaction. If 5.00 g of MgNH4PO4*6H2O are ignited, how many grams of Mg2P2O7 would be formed? 2MgNH4PO4*6H2O(g)--->
October 23, 2012 by Andrea

Physics - Heat and phase change
9.4 kJ of energy is available to take a sample of ice initially at -40*C, heat it to it's melting point, melt it, and subsequently heat it to 50*C. What is the mass, in grams, of the largest such sample for which this amount of energy will suffice?
March 19, 2013 by Jos

chemistry
hydrogen gas has a Henry's law constant of 1.07e-6 M/mm Hg at 25 Celsius when dissolving in water. if the total pressure of gas (H2 gas plus water vapor) over water is 1.0atm, what is the concentration of H2 in the water in grams per milliliter?
August 22, 2014 by angel

AP chem!!!
Iron ore consists mainly of iron III oxide. When iron III oxide is heated with an excess of coke(carbon), iron metal and carbon monoxide are produced. Assume that even if an excess of coke is not present that the reaction proceeds as described. A)write a balanced equation for ...
October 15, 2006 by Nicole

chemistry
I have two Chemistry related questions that were in my AP Chem summer packet. The first has to do with Stoichiometry. It says, "Calculate the number of moles, molecules, and atoms in 60.0 g of boron triflouride. I calculated that there are .885 moles, and 5.33 x 10^23 ...
August 28, 2006 by kelly

chemistry
when 84 joules of heat are added to 2.0 grams of water at 15 degrees C, what will be the final temperature of the water? A. 50. degrees C B. 5.0 degrees C C. 25 degrees C D. 15 degrees C
December 31, 2010 by Anonymous

what IS this question talking about!?
What is the specific heat of Aluminom if it takes 1100 calories to take the temp. from 10 degrees C to 80 degrees C and the block of Aluminon has a mass of 60 grams? For better results, put your SUBJECT in the SUBJECT line. Thanks. =) Answered above. I want to know about ecogly
December 19, 2006 by brandi

chemistry
For each of the following acid-base reactions, calculate the mass (in grams) of each acid necessary to completely react with and neutralize 3.60g of the base. 2HNO_3(aq) + Ca(OH)2(aq) -> 2H_2O(l) + Ca(NO_3)2(aq) H_2SO_4(aq) + 2KOH(aq) -> 2H_2O(l) + K_2SO_4(aq) how do i ...
October 20, 2007 by leo

chemistry
A student adds .137 grams of nickel(II) hydroxide powder to 10.0 L of distilled water at 25C with vigorous stirring. Did all of the powder dissolve? If not, how much powder remains undissolved? If so, how much more powder can be dissolved before a saturated solution is reached...
July 17, 2011 by Tyler

Chemistry
I will do an experiment that includes 4 grams of aluminum hydroxide and iron (III) oxide mixture, where 75% of it is Al(OH)3, and 15 ml of water and 25 ml of 2M KOH will be added and then boiled so that the Al(OH)3 dissolves. It will be filtered and then sulfuric acid will be ...
March 25, 2012 by Tiffany

chem
have 0.0114 mole of Cu(OH)2 (s) a gelatinous precipitate. After heating, and converting all of it to CuO(s) wash the solid as a means of purifying it. How much (in g) should you have of CuO at this point? do you just convert 0.0114 moles cu(OH)2 to grams and then thats the ...
September 24, 2012 by ANON

Chemistry
Use the balanced equation to answer the following: 3AgNO3(aq) + FeCl3(aq)...Fe(NO3)3(aq) + 3AgCl(s) If 21.73g of FeCl3 is mixed with 48.97g of AgNO3 a) Which is the limiting reagent? b) How many grams of AgCl can be theoretically produced? c) If 15.97g of AgCl was collected, ...
October 21, 2012 by Nicole

Sciences
A model airplane whose mass is 875 grams flies in a horizontal circle of radius 3.46 m at the end of a string which is at an angle of 10.5o below the horizontal. Find: a) The tension in the string. b) The speed of the airplane. I have answers but I am stuck on the process like...
July 2, 2013 by TCC

Comlumbus
Used the following equation to answer the question below : 5C(s)+2SO2(g)=CS2(I)+4CO(q) A-) how many moles of carbon needed to produce 13g of CS2. B-) how many grams of SO2 are necessary to react with 3.45g of carbon. C-) how many liters of CO (at STP) re produced from 2.45 ...
May 16, 2014 by PawToo

college chemistry
what theoretical yield of formaldehyde (in grams) is expected from the reaction of 44.3 g of methanol? (Assume that methanol is the limiting reactant.) Look at my response to a stoichiometric problem one question below by Kyle. Post any specific questions after you have ...
April 6, 2007 by Jaxson

Chemistry
N2H4+2H2O2->N2+4H2O a) If you start with 23.0 g of hydrazine and 23.0g of hydrogen peroxide, which substance is the limiting reactant? b) How much of the other chemical is left unreacted? c) Assuming 75% yield, how many grams of water are formed? I have no idea how to do ...
September 16, 2007 by Trevor

Chemistry
Help-I'm really confused-The barometric pressure in my area is 1014 and the temperature is 61 degrees farhenheit. I am suppose to have an imaginary balloon that contains 22 grams of carbon dioxide. Calculate the volume in liters of the balloon using the gas law constant. ...
April 21, 2010 by Robert

chemistry
Zinc metal reacts with HCL similarly to magnesium: Zn(s) + 2HCL(aq) = ZnCl2(aq) + H2(g). the H2 gas produced was collected over water at 25 degrees Celsius and had a volume of 7.80L at 0.980 atm. How many grams of Zn were consumed in the reaction? (Vapor pressure of water at ...
April 28, 2012 by preshi

ap chem
I was absent for this info and im stuck. A)calculate the pH in an acid-base titration when 10.00mL o 1.000 m NaOH is added to 50.00 mL of 1.000m HNO2. Ka=6.0x10^-4 B) How many grams of NaC2H3O2 must be added to 500mL o 0.200m HAc to produce a buffer with pH=5? 1.8 x 10^-5 =Ka ...
June 10, 2007 by Just

science
the quetion says "f the half life of Americium-241 is 433 years, &your sample size is 80 grams, how much will remain after 1,732 years?" i dont quite understand how to solve this problem... PLEAS HELP. SOS (gotta test 2morrow, and dont really know how to do these problems ...
January 15, 2009 by brianna

Chemistry
The vapor pressure of pure water at 85 celsius is normally 433.6 mmHg but decrease to 393.8mmHg upon addition? of an unknown amount of ammoniu chloride NH4Cl to 162.2g of water at this temperature. How many grams of ammonium chloride were added assuming complete dissociation ...
February 20, 2011 by Jude

chemistry
Calculate the volume of fuel needed for a flight if the jet fuel has a density of 0.803kg/L.First use dimensional analysis to convert liter to grams.Then substract to find how many kilograms need to be added.then convert this mass into liters,This is a dimensionalanalysis ...
September 9, 2014 by treasa

science
12. Convert 11.1 liters to centiliters. A. 1,110 centiliters B. 11,100 centiliters C. 111 centiliters D. 111,000 centiliters 13. Which of the following tasks should be performed before measuring the mass of any object on a triple-beam balance? A. Make sure that the balance pan...
October 27, 2014 by rachel help asap ms.sue

chemistry 1
if 20.2g of zn react with and equal amount of magnesium chloride to form magnesium and zinc chloride[zn+mgcl2> mg+zncl2] a.what is the limiting reactant? b. how much magnesium will be produced? Here is the way to solve most of these stoichiometry problems. Step 1. Write the...
May 11, 2007 by sam

physics
a bullet of mass of 12 grams is fired into a large block of mass 1.5 kg suspended from light vertical wires. the bullet imbeds in the block and the whole system rises 10 cm. find the velocity of the bullet just before the collision.
June 28, 2010 by erin

Intro to chem
What is the volume of 19.7g of oxygen at STP? Heres what i got but did not get the same answer..pls tell me where i am wrong! (grams to moles) 19.7g x 1 mol/ 16.00 = 1.23 mol Oxygen (Pv=nRT) looking for V 1.23 mol x 0.0821 x 273K / 1.00 atm = 27.57 CORRECT ANSWER is 13.8L!
April 14, 2011 by pooja

chemistry
a certain paint has a density of 0.914 g/mL. you need to cover a wall that is 7.6 meters long and 2.74 meters wide with a layer of paint that is 0.13 mm thick. what volume of pain (in liters and gallons)is required? what is the mass (in grams and pounds) of paint layer?
February 1, 2012 by mark

childcare
Following the nutritional label on the jar of peanut butter. you determine that 1 ounce of the peanut butter contains 115 calories and 9 grams of fat what percent of calories come from fat? A.30 b.40 c.70 d.80
May 4, 2010 by Nicole

chemistry
Chlorine is used to disinfect drink water supplies and pool water. Suppose you have 17.3 L of Cl2 in a cylinder at 1200 torr and 24 C. How many grams of chlorine do you have in the gas cylinder?
October 9, 2010 by Jazmin

Chemistry
A solution is made by dissolving 3.5 moles of sodium chloride (NaCl) in 155 grams of water. If the molal boiling point constant for water (Kb) is 0.51 C/m, what would be the boiling point of this solution?
January 14, 2011 by Christi

math
The mass of one electron is 9.11 * 10(negative 28) grams. A uranium atom contains 92 electrons. Find the total mass of the electrons in a uranium atom. Express your answer in scientific notation.
October 15, 2011 by christy

Chemistry
How many milliliters of 0.277 M AgNO3 solution are needed to react completely with 47.1 mL of 0.278 M NaCl solution? How many grams of AgCl will be formed? The reaction is NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3(aq)
November 1, 2011 by Lynn

Chemistry
How much energy does it take to convert 750 grams of ice at 0 degrees Celsius to liquid water at 40 degrees Celsius? (Specific Heat of water = 4.18 J/g*C and the heat of fusion = 334 J/g)
May 10, 2012 by Morgan Chemistry

chemistry
How much heat is absorbed by a persons hand if 100 grams of liquid water at 100C is poured on his hand? (Assume the final temperature of the water will be normal body temperature of 37C
July 10, 2012 by Anonymous

Physics
What amount of heat is required to raise the temperature of 350 grams of copper to cause a 25C change? The specific heat of copper is 0.39 J/gC A. 2500 joules B. 2600 joules C. 3400 joules D. 3900 joules
April 24, 2013 by Fredrick

science
. An ice cube of 48.7 grams is just beginning to melt. It is dropped into a swimming pool with a temperature of 26.0 C. How much heat will the ice cube absorb from the water in the swimming pool?
January 31, 2014 by chelsea wagner

Chemistry
A 1N solution of NaOH is diluted 4/20 then rediluted 1:50. What is the final normality? How many grams of NaOH are present in 100ml of the final solution? I sort of understand the basic concept, but I don't really know how to do normality problems.
May 20, 2014 by Jennie

Chemistry
How many moles of steric acid are contained in 0.25mL of a hexane solution containing 5.4x10^-4 grams of steric acid/L? (Hint: g/L x L = g/ (g/mol)=mol). Please show your work. Please help. Thank you
October 6, 2014 by Paul

Chemistry
How many moles of steric acid are contained in 0.25mL of a hexane solution containing 5.4x10^-4 grams of steric acid/L? (Hint: g/L x L = g/ (g/mol)=mol). Please show your work. Please help. Thank you
October 6, 2014 by Paul

chemistry.
Lithium hydroxide reacts with carbon dioxide as follow. 2LiOH + CO2________ Li2CO3 + H2O What mass (in grams) of Lithium hydroxide is need to react with 11 g of carbon dioxide?
September 28, 2009 by Richard

Chemisrty
Kate has 35 grams of xenon gas in a 15 liter tank at 11 degrees celsius and 250 atmospheres. If she heats the gas in the tank up to 2500 degrees celsius, what will its pressure be, in Kilopascals?
December 19, 2010 by JJ

Chemistry
Calculate the amount of water (in grams) that must be added to (a)5.00 g of urea (NH2)2CO in the preparation of a 16.2 percent by mass solution, and (b)26.2g of MgCl2 in the preparation of a 1.5 percent by mass solution.
September 19, 2010 by Diana

chemistry
How many nutritional Calories does my body use when I consume a glass of 32.0 degree F. ice water, which contains 200. mL of liquid water and 30.0 grams of ice (body temperature 98.6 degree F)
October 7, 2010 by Anonymous

Chemistry
Need Help On This Question.! Potassium chloride reacts with bromine forming potassium bromide plus chlorine. If 500g of potassium bromide are produced, how many grams of potassium chloride reacted?
December 4, 2010 by Jacky

Chemistry
Phosphoric acid reacts with zinc to produce hydrogen gas and zinc phosphate. How many grams of acid are required to produce 5.3 liters of hydrogen at 743mmHg and 27.0 degrees Celsius
February 28, 2011 by Alex

science
Megan could dissolve only 36 grams of salt in 100ml of water. Describve what she could do if she wanted to dissolve more salt in 100ml of water? please i need the answer by tomorrow :(
September 4, 2011 by Abii

chemistry
17.8 grams of CH4 reacts with 55.4 g of )2 to from CO2 and H20 what is the mass of H20 formed? and how much excess reactant is leftover? so i think that O2 is the limiting reagent and CH4 is the excess reagent help?
December 11, 2011 by Skye

chemistry
consider the reaction between copper metal and chlorine gas producing solid copper(1) chloride. when 16.2g of copper is reacted in an excess of chlorine, how many grams of copper(1) chloride will be produced
April 28, 2012 by janice

science
you need to make a 3.5 Molar solution of Ca(OH)2, however, you only want to make 50ml of this Ca(OH)2 solution. How many grams of Ca(OH)2 will you need to weigh out and add to 50ml of water? Mass=VolumeinLiters*Molarity*Molmass
December 12, 2006 by brittany

Chemisty
Ok this is what i got for the grams part now.... Total mass is 20.14 + 51.64 + 11.34 + 15.06 = 98.18 %H2O = (20.14/98.18)*100 = 20.51% %C2O4 = (51.64/98.18)*100 = 52.60% % Fe 3+ = (11.34/98.15) * 100= 11.55% % K + = (15.06/98.15) * 100 = 15.43 % 20.51 g H2O, 52.60 g C2O4 11.55...
May 4, 2008 by LT

chemistry
Hydrochloric acid can be prepared using the reaction described by the chemical equation: 2 NaCl(s) + H2SO4(l) ----> 2 HCl(g) + Na2 SO4(s). How many grams of HCl can be prepared from 393 g of H2SO4 and 4.00 moles of NaCl?
September 30, 2009 by j

chemistry
Suppose a solution containing 3.50g of Na3PO4 is mixed with an excess of Ba(NO3)2. how many grams of Ba2(PO4)2 can be formed. 2-Na3PO4 +3-Ba3(NO3)2= 1-Ba3(PO4)2 + 6-NaNO3.(Balanced equation)
March 8, 2010 by Kerry

physics
Transverse waves with a speed of 50.0 m/s are to be produced on a stretched string. A 5.00m length of string with a total of 60 grams is used. a) what is the required tension in the string? b) calculate the wave speed in the string if the tension is 8.00n.
May 11, 2010 by yolanda

chemistry
Copper reacts with sulfuric acid according to the following equation: 2H3SO4 + Cu-> CuSO4 + 2H2O + SO2 How many grams of sulfur dioxide are created by this reaction if 14.2 g of copper reacts with 18 g of sulfuric acid?
January 20, 2011 by Maria

chemistry
Copper reacts with sulfuric acid according to the following equation: 2H3SO4 + Cu-> CuSO4 + 2H2O + SO2 How many grams of sulfur dioxide are created by this reaction if 14.2 g of copper reacts with 18 g of sulfuric acid?
January 20, 2011 by Maria

chemistry
Copper reacts with sulfuric acid according to the following equation: 2H3SO4 + Cu-> CuSO4 + 2H2O + SO2 How many grams of sulfur dioxide are created by this reaction if 14.2 g of copper reacts with 18 g of sulfuric acid?
January 20, 2011 by Jazmin

Physical Science
Suppose you dissolve 40g of potassium nitrate in 100 cm3 of water at 100 C. If half the solution os poured out, how many grams of potassium nitrate will the remaining solution contain?
February 7, 2011 by Matthew

Chemistry
How many grams of calcium phosphate (precipitate) could be produced by combining 12.096g of calcium nitrate dissolved in water with 16.498g of rubidium phosphate dissolved in water? Report your answer to 3 decimal places.
January 22, 2013 by Jaden

Chemistry
How many grams of calcium phosphate (precipitate) could be produced by combining 12.443g of calcium nitrate dissolved in water with 16.083g of rubidium phosphate dissolved in water? Report your answer to 3 decimal places.
January 22, 2013 by Jaden

Calculus
Find the total mass of the triangular region with coordinates (-1,0),(0,4),and (1,0). All lengths are in centimeters, and the density of the region is (x)=5+x grams/c^m2. I know that to get the total mass i have to do density* lenght and ingegrate, but I dont know how to to it...
October 26, 2011 by Caroline

science
10 grams of ice at 0 degree centigrade absorbs 5460 joules of heat to melt and change itno water at 50 degree centigrade.calculate the specific latent heat of fusion of ice?
September 20, 2012 by Anonymous

Physical Science
How much heat is absorbed by pouring 10 grams of 100C liquid water on a students hand. The water is cooled to body temperature, 37C. Assume that all of the heat is absorbed by the hand
October 22, 2012 by Kayden

physical science
How much heat is absorbed by a persons hand if 100 grams of liquid water at 100C is poured on his hand? (Assume the final temperature of the water will be normal body temperature of 37C)
October 23, 2012 by Holland

Chemistry
A gas mixture containing N2 and O2 was kept inside a 2 L container at a temperature of 23 C and a total pressure of 1 atm. The partial pressure of oxygen was .722 atm. How many grams of nitrogen were present in the gas mixture?
July 20, 2013 by Sara

magnitude
9. There is a vector H with x component = -250[g] and y component = 70[g]. What is the magnitude of H? sqrt [(-250)^2 + (70)^2]= 259.6 I don't see the significance of the [g] notation. The dimensions of a vectors would not be grams. Mass is not a vector.
August 29, 2005 by Cheyenne

chemistry
If you collect hydrogen gas over water at a temperature of 45 degrees celcius, what is the volume of jst te hydrogen if the pressure of hydrogen is 1.23 atm and the grams of hydrogen was 2.6? What is the volume of the water?
December 4, 2010 by regina

catd
The specific heat of silver is 0.057 calories/gramC. If 10.0 grams of silver were heated and the temperature of the sample changed by 20.0C, how many calories of heat energy were absorbed by the sample?
February 4, 2011 by Anonymous

science
how grams it would take to fill the buret to 35mL? is this would take more or less than for butane? what do you think causes this value to be different from the value for butane?
July 9, 2011 by baby1

Chemistry
In a combination reaction, 2.22 g of Magnesium is heated with 3.75 g of Nitrogen a) which reactant is present in excess? b) how many moles of product are formed? c) after reaction, how many grams of each reactant and product are present?
October 10, 2011 by Saige

Physics
Suppose you have 100 g of radioactive plutonium-239 with a half-life of 24,000 years. How many grams will remain after (a) 12,000 years (b) 24,000 years (c) 96,000 years?
September 2, 2012 by b

Physics
Suppose you have 100 g of radioactive plutonium-239 with a half-life of 24,000 years. How many grams will remain after (a) 12,000 years (b) 24,000 years (c) 96,000 years?
September 2, 2012 by b

chemisty
1.5 grams hydrogen 12 oxygen 2gram hydrogen 16 gram oxygen 2.5grams hydrogen 20grams oxygen
December 14, 2012 by dionna

chemisty
1.5 grams hydrogen 12 oxygen 2gram hydrogen 16 gram oxygen 2.5grams hydrogen 20grams oxygen
December 14, 2012 by dionna

math
An alloy of metals is 25% copper. Another alloy is 50% copper. How much of each alloy should be used to make 1000 grams of an alloy that is 45% copper
September 19, 2010 by Danie;

chemistry
to produce 4.00 mole if c6h12 from the following how many grams of c6h6 must you combine 78.12 g/mol c6h6 + 2.02 g/mol h2 = 84.18 g/mol c6h12
February 7, 2012 by Amber

chemistry
copper (II) flourine comtains 37.42 % of mass. use this percentage to calculate the mass of flourine in grams contained in 28.5 g of copper (II) flourine
December 5, 2012 by Justin

chemistry
A nitric acid solution containing 71.0% by mass of the acid has a density of 1.42g/ml how many grams of nitric acid are present in 1.0L of this solution
May 3, 2013 by cheryl

chemistry
How many moles are in 13grams of C6H6. should this question be broken down into its imperical formula (CH)6 and calculate the number of moles of CH and multiply by 6 or calculate the gram molecular wt of C6H6 and divide it into 13 grams?
January 23, 2010 by richard

Chemistry
Compound Z has a MW of 100. Your lab partner weighed 25 grams of compound Z and dissolved it in water to a final volume of 1 liter. a) What is the concentration of the solution expressed as a percentage by weight (w/v)? b) What is the concentration of the solution expressed as...
August 29, 2011 by Ty

Chemistry
Substance A has a normal fusion point of ‑10.0 oC, an enthalpy of fusion = 150.0 J g^-1; specific heats for the solid and the liquid are 3.00 and 6.20 J g^-1 oC^-1, respectively. How much heat, in J, is required to change 150 grams of A from a solid at 40.0 oC to a ...
November 8, 2011 by Kale

Physics
A hockey player shoots the puck which is initially at rest by applying a force of 72 N through a displacement of 1.6 m. The mass of the puck is 161 grams. a) Calculate the work done by the player on the puck. b) Calculate the resulting speed of the puck
March 31, 2012 by Anonymous

chemistry
Suppose 70.00 mL of a lithium hydroxide, LiOH, solution requires 55.42 mL of a 0.1050 M solution of propanoic acid, C2H5COOH, for neutralization. LiOH + C2H5COOH C2H5COOLi + H2O What is the concentration of the base solution? 0.08313 M 0.1663 M 0.3325 M 0.6650 M Question 2 4...
October 9, 2010 by hope

Chemistry - Density
Automobile batteries contain sulfuric acid. Calculate the number of grams of sulfuric acid in 0.500L of battery acid if the solution has a density of 1.28g/mL and is 38% H2SO4 (small numbers) by mass? Can you please answer this for me? double post.
October 5, 2006 by Tracey

chemistry
In an experiement 23.4 g of iron sulphide are added to excess oxygen and 16.5 grams of iron (III) oxide, Fe2O3 are produced the balanced equation for the reaction is 4FeS + 7O2 -- 2Fe2O3 + 2SO2 Calculate the percent yield of iron oxide in the experiement
July 27, 2010 by Kelsey

chemistry
A sample of 7.83 grams of NaOH is dissolved into 620 mL of aqueous 0.250 M NaOH (as- sume no volume change). This solution is then poured into 1.67 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the final solution?
September 6, 2010 by Anonymous

chemistry
We add excess Na2CrO4 solution to 27.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.420 grams. What is the molarity of the AgNO3 solution? Answer in units of M
September 19, 2012 by cheri

AP Chemistry
We add excess Na2CrO4 solution to 68.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.270 grams. What is the molarity of the AgNO3 solution? Answer in units of M
September 11, 2013 by Gabriella

general chem
Calculate the molarity of a solution made by dissolving 12.5 grams of Na2CrO4 in enough water to form exactly 550 mL of solution. (b) How many moles of KBr are present in 150 mL of a 0.275 M solution? (c) How many milliters of 6.1 M HCl solution are needed to obtain 0.100 mol ...
October 9, 2011 by rob

general chem
Calculate the molarity of a solution made by dissolving 12.5 grams of Na2CrO4 in enough water to form exactly 550 mL of solution. (b) How many moles of KBr are present in 150 mL of a 0.275 M solution? (c) How many milliters of 6.1 M HCl solution are needed to obtain 0.100 mol ...
October 9, 2011 by rob

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