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December 20, 2014

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Number of results: 7,017

science
Napolweon pencil has a mass of 3 grams (0.27Napoleon ) when he lifts his pencil from the desk to his paper he moves it an average of 20cm (o.20m) He then returns it to his desk moving it another 20cm How much work did he do on his pencil? w=FXD
October 24, 2009 by Barbara

Stratford
A sample of a volatile liquid is vaporized completely in a 240 ml falsh at 99 c and 757 torr. The vapor is then allowed to condense to al liquid and its mass is determined to be .564 grams. What is the molecular mass of the liquid (that was vaporized)?
February 18, 2010 by Courtney Venable

chemistry
The disintegration of a radioisotope, such as I-131 to Xe-131, is another example of a first-order reaction. It has a half-life of 8.0 days. I-131 -> Xe-131 + e If you start with 1.40 g I-131, how many grams of I-131 will be left after the following days? PLEASE HELP!!!!
July 1, 2012 by Ashley

Chemistry
Al_S=Al2S3 10 grams of Al were mixed with 15 gram of S Find: limiting reagent al or s? How much Al2S3 were formed in reaction? What is the excess reagent?Al or S? How much excuss reagent left over after reactin? Thanks! <3
November 20, 2012 by mal

Chemistry, HELP!!
a) If the volume of a flask is 165 mL and the mass of the vapor in the flask is 0.2136 grams, what is the density of vapor in the flask? b)If the temperature of the vapor is 25 degrees Celsius, what is the molecular weight of the vapor? (Assume the gas pressure to be 1.00 atm.)
September 23, 2014 by Brian

chemistry please help!!
For the reation: C3H8+5 02 =3 CO2+4 H2O How many moles of C3H8 are needed to make 3.60 grams of H2O? I think the ans is 0.05 moles c3h8
October 25, 2010 by Lillian

Algebra
A rectangular sheet of aluminum foil is 50 centimeters long and 20 centimeters wide, and weighs 5.4 grams. Find the thickness of the aluminum foil in centimeters.
February 13, 2011 by Anonymous

algebra
A rectangular sheet of aluminum foil is 50 centimeters long and 20 centimeters wide, and weighs 5.4 grams. Find the thickness of the aluminum foil in centimeters.
February 27, 2011 by De Angelis

chemistry
A 49g piece of ice at 0.0C is added to a sample of water at 9.0C. All of the ice melts and the temperature of the water decreases to 0.0C . How many grams of water were in the sample?
September 9, 2011 by steph

physics
A fishtank with inside dimensions of 30.5 cm X 61 cm X 30.5 cm is filled with water. What is the volume in cm3 of water required? What is the mass in grams of the water required? What is the mass in kilograms?
September 12, 2011 by jeff

chemistry
A plastic container with a mass of 30 grams gains 1,140 joules of heat. If the temperature of the container increases 20C, what is the specific heat of the plastic in the container?
January 4, 2012 by carl

college 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

fundinjobo high science
a mass of 80 grams of hydrogen gas is heated with nitrogen gas to produce ammonia gas .what is the mass of ammonia that will be produced
August 14, 2014 by makhosazane

intro to chemistry
. Nitrogen is unique in that it forms no fewer than seven molecular oxides. The one of highest molar mass is dinitrogen pentoxide, N 2 O 5 , a crystalline, colorless solid made by the reaction of nitric acid (HNO 3 ) with P 4 O 10 . HNO 3 ( l ) + P 4 O 10 (s) N 2 O 5 (s) + ...
June 22, 2013 by Anonymous

Ap Chemistry
Posted by Jake on Sunday, September 23, 2007 at 1:08pm. My objective is to find the molar volume of a gas. Is this the correct balanced equation for magnesium ribbon reacting with hydrochloric acid to form hydrogen gas? 2Mg (s) + 2HCL (l) ----> H2 (g) + 2MgCl (aq) Also, I'm...
September 25, 2007 by Jake

Chemistry
How do I find how many grams of CH3COOH are present in cm^3 of vinegar? Also, how many moles of CH3COOH are present in 2.5 cm^3 of vinegar? Thanks!
March 5, 2011 by Steven

chemistry, ap chemistry
At 800 K the equilibrium constant for I2(g) 2 I(g) is Kc = 3.1 10-5. If an equilibrium mixture in a 10.0-L vessel contains 3.56 10-2 g of I(g), how many grams of I2 are in the mixture?
January 22, 2013 by Sarah

Science
calculate the mass of sodium nitrate in grams in a 150 ml solution of a 5.00 M solution of sodium nitrate
April 19, 2011 by Stephanie

chemistry
The density of sulfuric acid, is 15.28 lb/gal. What is the density of sulfuric acid in grams per milliliter?
January 17, 2012 by betty

math
the energy bar kyle is eating has 37 grams of carbohydrates.how many calories are from carbohydrates in the energy bar
May 3, 2013 by sade

Chemistry
Copper metal reacts with concentrated nitric acid according to the following balanced equation: 3Cu(s) + 8HNO3(aq) 3Cu(NO3)2(s) + 2NO(g) + 4H2O(l) Calculate the mass in grams of the excess reagent remaining after the complete reaction of 4.63 g of Cu with 9.26 g of HNO3. ...
November 6, 2007 by Hector

chemistry
My original sample of mixed salt had a mass of 8.9 grams. After heating the mixture in the crucible and weighing it multiple times my final mass of salt ended up being 4.9. How many moles of oxygen were driven off? Lost on how to do this been a while since I have done this.
April 1, 2014 by bekah

Chemistry
Hydrogren, a possible future fuel, can also be obtained from other compounds such as ethanol. Ethanol can be made from the fermentation of crops, such as corn. How much hydrogen in grams can be obtained from 1.0 kg of ethanol (C2H5OH)?
April 1, 2008 by Kate

Chemistry
Ethane (C2H6) burns with oxygen to produce carbon dioxide and water. A sample of ethane was burned completely and the water that formed had a mass of 1.61g. How much ethane, in moles and in grams, was in the sample?
November 10, 2010 by Shabear

Chemistry
Ethane (C2H6) burns with oxygen to produce carbon dioxide and water. A sample of ethane was burned completely and the water that formed had a mass of 1.61g. How much ethane, in moles and in grams, was in the sample?
November 10, 2010 by Shabear

chemistry
Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 2.335-g sample of Mg metal is added to 50.0 mL of a 4.00 M HCl solution, and the reaction goes to completion. How many grams of H2 are formed?
September 1, 2011 by ALEX

Chemistry
Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 2.970-g sample of Mg metal is added to 50.0 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 Carolina

chemistry
Sodium metal is immersed into graduated cylinder that holds exactly 32.5 ml. The sodium metal used to fill the cylinder weighs 405.5 grams. Calculate the density of sodium based on the given data.
July 27, 2014 by Marcus

Chemistry
Since a hydrogen atom consists of one proton and one electron, it should have a mass of 1.763 x 10^-24 grams. Using unit factoring, calculate how may hydrogen atoms you'd have if you had 5.6 g of hydrogen. Thank you!
September 18, 2014 by Ellie

Chemsitry
How many grams of ice at -24.3∘C can be completely converted to liquid at 23.9∘C if the available heat for this process is 4.82103kJ ? For ice, use a specific heat of 2.01J/(g⋅∘C) and ΔHfus=6.01kJ/mol.
October 14, 2014 by Steve

Math
A rectangle solid is 10.0cm long ,8.1cm wide and 2.7cm tall. The mass of the rectangular solid is 36g What is the density hi Density = mass/volume D = 36/(10 * 8.1 * 2.7) Your answer should be in terms of grams per cubic centimeter. I hope this helps. Thanks for asking.
July 23, 2007 by Mason

chemistry
How many grams of lead(II) iodate, Pb(IO3)2 (formula weight = 557.0 g/mol), are precipitated when 3.20 102 mL of 0.285 M Pb(NO3)2(aq) are mixed with 386 mL of 0.512 M NaIO3(aq) solution? The unbalanced equation of reaction is: Pb(NO3)2(aq) + NaIO3(aq) → Pb(IO3)2(s) + ...
September 26, 2010 by Diggs

chemistry
Oxalic acid (H2C2O4) can be used to remove rust according to the following balanced equation: Fe2O3 + 6H2C2O4 --> 2Fe(C2O4)33- +3H2O + 6H+ Calculate the number of grams of rust that can be removed by 5.00 x 102 ml of a 0.122M solution of oxalic acid.
October 3, 2010 by amber

engineering
A cylinder has 500 cm^3 of water. after a mass of 100 grams of sand is poured into the cylinder and all air bubbles are removed by a vacuum pump, the water level rises to 537.5 cm^3. Determine the specific gravity of the sand?
September 21, 2011 by Marilyn

Chemistry
a solution is made by combining 10.0 ml of 17.5 M acetic acid with 5.54 g of sodium acetate and diluting to a total volume of 1.50 L. a)calculate the pH of the solution. b) how many grams and milliliters of 14.6 M potassium hydroxide needs to be added so pH=pKa? c)what is the ...
November 29, 2011 by Amanda

Chemistry
1) Consider the formation of sulfur trioxide according to the reaction: 2 SO2(g) + O2(g) -> 2 SO3(g) delta H = -198 How much heat is evolved in the formation of 750 grams of SO3? So I did 193 X (750/2*80.0642) = 904. The answer choices given are 10.6, 928, 1.86 X 10^3, 7.43...
January 21, 2012 by Hannah

camestry
Calculate the number of grams of calcium chloride (CaCl2) needed to react with excess silver nitrate (AgNO3) to produce 6.60 g of silver chloride (AgCl). The equation for the reaction is given below: CaCl2 + 2AgNO3 → 2AgCl + Ca(NO3)2
November 5, 2012 by mohammed

chem
A sample of PCl5 weighing 2.69 grams is placed in a 1.000 liter flask and vaporized completely at 250 o C. The final pressure observed at this temperature is 1.000 atmospheres. Note that some, but not all of the PCl5 decomposes according to the equation: PCl5 (g) --------->...
December 6, 2011 by laura

AP Chemistry
We were given a 12 cm by 12 cm area of aluminum foil (it weighed 0.60 g) and were told to calculate the atomic mass of Aluminum atoms given that the radius of 1 aluminum atom is 143 picometers and the density is 2.7 grams per centimeter cubed, without using Avogrado's number. ...
November 15, 2012 by BadatChem

Someone PLEASE HELP! (Chemistry)
Use the following problem to: Outline how to determine the limiting agent. Determine the excess reactant and how much is left over. Determine the amount of each of the products produced. CaSO4 + AuF3 = CaF2 + Au2(SO4)3 Start with 15 grams of each reactant.
January 9, 2013 by Shelbie

Chemistry
The chemical reaction for the generation of gas in an automobile safety air bag is 2NaN3(s)→ 2Na(s)+3N2(g) What volume of gas is produced if there are 130.0 grams of NaN3 used in the reaction? (The density of nitrogen gas is 0.916 g/L.) Please show your work.
March 31, 2014 by Kayla

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

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