Friday
July 1, 2016

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

Chemistry
What is the value for Kb for the formate anion, HCOO-? Ka(C7H5O2)=2.1x10^-4.
Monday, April 25, 2016 by Lyndsay

Chemistry
A weak acid HA (pka=6.00) was titrated with 1.00M NaOh. The acid solution had a volume of 100ml and a concentration of .100M. Find the pH at the following volumes of added base. Vb=20ml
Monday, April 25, 2016 by Layla

Chemistry
A 25.0 g sample of iron at 398K is placed in a styrofoam cup containing 25.0 mL of water at 298K. Assuming that no heat is lost outside the cup, what will the final temperature of the water be? What will the final temperature of the iron be? I set them equal to each other to ...
Monday, April 25, 2016 by Merp

Chemistry
A hot air balloon is filled with hot air and the hot air forces the volume of the balloon to expand until the density of the gas in the balloon is less than the density of the outside air. The volume must be 20% larger than the balloon would be at STP in order for the balloon ...
Monday, April 25, 2016 by Chem

Chemistry
A hot air balloon is filled with hot air and the hot air forces the volume of the balloon to expand until the density of the gas in the balloon is less than the density of the outside air. The volume must be 20% larger than the balloon would be at STP in order for the balloon ...
Monday, April 25, 2016 by KS

Chemistry
Please check my work- what is the molarity of a solution that has 34.85 g of Potassium sulfate dissolved in one liter of solution? so K2(SO4) molar mass is 174.26, 34.85 grams x 1mol/174.26 than divided by 1 Liter equals .19998 Molarity with sig figs would it be .1999 or .2000?
Monday, April 25, 2016 by Petey

Chemistry
A 100.0 mL sample of 0.300 M Ca(OH)2 is mixed with 100.0 mL of 0.700 M H3PO4 in a coffee cup calorimeter. If both solutions were initially at 35.0 degrees celsius and the resulting solution had a temperature that was recorded at 39.7 degrees celsius, determine the delta Hrxn ...
Monday, April 25, 2016 by 2difficult

chemistry
A 100.0 mL sample of 0.300 M Ca(OH)2 is mixed with 100.0 mL of 0.700 M H3PO4 in a coffee cup calorimeter.If both solutions were initially at 35.0 °C and the resulting solution had a temperature that was recorded at 39. 7°C, determine the ΔHrxn in units of kJ/mol...
Monday, April 25, 2016 by jenna

Chemistry
Knowing the milk of magnesia contains 8 g% of Mg (OH) 2, we used 1 g milk of magnesia and added 50 mL of 0.100 M HCl, determine the volumeainda of a solution of 0.105 M NaOH to titrate the excess HCl 0.100 M
Monday, April 25, 2016 by Caleb

Chemistry help needed
Calculate the pressures, P, in atmospheres at which the mean free path, l, of a hydrogen molecule will be 5.00 μm, 5.00 mm, and 5.00 m at 20.0 °C. The diameter of a H2 molecule is 270 pm. I= 5.00μm 5.00mm 5.00m P= ? atm ? atm ? atm
Monday, April 25, 2016 by windal

Science - Chemistry
Calculate the amount of energy a woman takes in during a year on a 2200kcal a day diet (1 calorie = 4.18J). Calculate the amount of energy she spends in driving 5000 miles a year at 40 miles to the gallon of octane, given 1 gallon of octane weighs 3.12 kg, and standard ...
Monday, April 25, 2016 by Willie ISSAC

Chemistry problem
The formula for the Maxwell-Boltzmann distribution is given below,where y is proportional to the fraction of particles of molecular mass m at temperature T traveling at speed u. The expression frac(u1,u2) gives the fraction of particles between speeds of u1 and u2. Determine ...
Monday, April 25, 2016 by windal

chemistry
The first step in the process used to recover zinc metal from zinc sulfide ore is the reaction of zinc sulfide with oxygen gas to produce zinc oxide and sulfur dioxide. 2 ZnS(s) + 3 O2(g) → 2 ZnO(s) + 2 SO2(g) When the external pressure is 142700 Pa and the temperature ...
Monday, April 25, 2016 by windal

Chemistry
A 0.18 g sample of unknown was placed in a flask and dissolved in 125 mL of deionized water. A solution of HCl (0.13 M) was used to titrate the sample, and 16 mL was required to reach the endpoint. What is the formula weight of the unknown?
Sunday, April 24, 2016 by Taylor

Chemistry
To draw the lewis dot structure of H3COH3, Do I need to rearrange the formula as CH3OCH3? If not, On paper I have O H H C O C H H H I am not sure if this is the right structure.
Sunday, April 24, 2016 by My name is Earl

Chemistry
I have a .01 M solution of N2, and the concentration of H2 in the same solution is .02. What is the Ksp.
Sunday, April 24, 2016 by Elizabeth

Chemistry
Calculate the energy required to change the temperature of 256.7 mL of water at 22.0 degrees celsius to ice at a temperature of -25.5 degrees celsius. It also tells me to look up the heat of fusion and specific heat. I don't know what I need the heat of fusion for exactly...
Sunday, April 24, 2016 by Un-Known

Chemistry
When the power supplying a 30.0 gallon water heater was turned off, the temperature dropped from 75.0 degrees celsius to 22.5 degrees. How much heat was lost to the surrounding? I know I need to find the energy and or heat lost, but how will i get the mass of H2O used to ...
Sunday, April 24, 2016 by Un-Known

Chemistry- Dr.Bob222
Is there an actual value for the buffer capacity of acetic acid? I need to know the actual value, so that I can calculate the percent error for my lab.
Sunday, April 24, 2016 by Nevaeh

Chemistry
1.) A closed 5.00 L container is filled with a mixture of 4.00 moles of hydrogen gas, 8.00 moles of oxygen, 12.0 moles of helium, and 6.00 moles of nitrogen. What is the pressure in this container at a temperature of 25 °C? 2.) A closed 5.00 L container is filled with a ...
Sunday, April 24, 2016 by Sunny

Chemistry
The average rate of disappearance of ozone in the reaction 2O3(g) ---> 3O2 (g) is found to be 8.12 x 10^-3 molecules over 15 seconds. What is the rate of appearance of O2 during this interval
Sunday, April 24, 2016 by Rose

organic chemistry
Apart from the fact that between the two structures, only cyclohexe-4-ene-cis-1,2-dicarboxylic acid has the OH group shown on the IR spectrum. In what other majors way will the IR spectrum of cyclohex-4-ene-cis-1,2-dicorboxylic anhydride differ from the IR spectrum of ...
Sunday, April 24, 2016 by sarah

Analytical Chemistry
Calculation Of K2mno4 In Lab Class?
Sunday, April 24, 2016 by Ermiyas

Chemistry
Balanced chemical equation for H2O + SO2 --> O3 + H2S + SO3?
Sunday, April 24, 2016 by Name

chemistry
how do i calculate a weight/vol % from a molarity given the density? Molarity is 0.0303 M density = 1.52 g/mL, molar mass is 41.99 g/mol.
Sunday, April 24, 2016 by Anonymous

Chemistry
Given info: Time(s). (ClO) mol/L 0.0. 0.012 4.0. 0.008 8.0. 0.005 12.0. 0.0035 16.0. 0.0025 20.0. 0.002 24.0. 0.0018 28.0. 0.0017 Calculate the average rate of the overall reaction
Sunday, April 24, 2016 by Rose

chemistry
The pH of human blood needs to be between 7.35 and 7.45. You want to prepare a buffer solution that gives a pH of 7.40. You decide to use a sodium phosphate buffer: the acid is H2PO− 4 and the conjugate base is HPO2− 4 . You want the concentration of the acid to be...
Sunday, April 24, 2016 by Anonymous

Chemistry
Consider the following reaction in water: P4 (s) + 6 H2O (l) → 2 PH3 (g) + 2 H3PO3 (aq) If you allow 23.42 g of P4 to react what would be the pressure that the dry gas would exert on a 15.00 mL container at STP. Assume all of the phosphorus reacted. This can be solved by...
Sunday, April 24, 2016 by Name

Chemistry
What is the wavelength of light (in nm) if the energy of the wave is 1.33x 10^-19 J? How do I work this problem out????
Sunday, April 24, 2016 by Evin

Chemistry
What is the final concentration of a solution if 15-mL of a 2.4-M solution was diluted to 100-mL and this process was repeated two more times? Please help me how to work out the problem. I am not just looking for an answer. I really want to learn.
Sunday, April 24, 2016 by Evin

Chemistry
You prepare a buffer solution by dissolving 2.00 g each of benzoic acid, C6H5COOH and sodium benzoate, NaC6H5COO in 750.0 mL of water. What is the pH of this buffer? Assume that the solution's volume is 750.0 mL.
Sunday, April 24, 2016 by Dron

Chemistry
Zn (0.85M) + Cu (1.10M) in an electrochemical cell. what is the conc of the zinc ion?
Sunday, April 24, 2016 by Ron

chemistry
If 1 L HCl has a molarity of 0.10 M, what molar concentration of 1 L AgNO 3 is needed for HCl to completely react? How much product (moles and volume) will be formed? HCl(aq)+ AgNO3(aq) ->AgC(s)+HNO3(aq)
Sunday, April 24, 2016 by Anonymous

chemistry
If 1 L HCl has a molarity of 0.10 M, what molar concentration of 1 L AgNO 3 is needed for HCl to completely react? How much product (moles and volume) will be formed? HCl(aq)+ AgNO3(aq) ->AgC(s)+HNO3(aq)
Sunday, April 24, 2016 by Anonymous

chemistry
If 1 L HCl has a molarity of 0.10 M, what molar concentration of 1 L AgNO 3 is needed for HCl to completely react? How much product (moles and volume) will be formed? HCl(aq)+ AgNO3(aq) ->AgC(s)+HNO3(aq)
Sunday, April 24, 2016 by Anonymous

chemistry
Calculate the de Broglie wavelength (in pm) of a hydrogen atom traveling 450 m/s .
Sunday, April 24, 2016 by samantha

chemistry buffer
Calculate the amount of sodium acetate to be added to 100ml of a 0.100M acetic acid (pka=4.76) solution to obtain a buffer of pH 4.50.
Sunday, April 24, 2016 by Mansura

Chemistry
0.0045 M HNO3 calculate the H3O concentration
Sunday, April 24, 2016 by Caleb

chemistry
I posted a question several days ago: The pH of human blood needs to be between 7.35 and 7.45. You want to prepare a buffer solution that gives a pH of 7.40. You decide to use a sodium phosphate buffer: the acid is H2PO−4 and the conjugate base is HPO2−4 . You want...
Sunday, April 24, 2016 by anon

Chemistry
Methane (CH4) is the major component of natural gas. 2.5 moles of methane were placed in a commercial colorimeter and subjected to a combustion reaction. The reaction released 2800 kJ of energy. Compare this energy value to the energy values of paraffin and diethylene glycol. ...
Saturday, April 23, 2016 by Tracy

Chemistry
One of the two possible rearrangements of the parent ion of 2-methyl-3-pentanol is more likely than the other. Which rearrangement is more likely, and explain why there is a difference?
Saturday, April 23, 2016 by Anonymous

chemistry
Which type of heat transfer is not blocked even by an insulated thermos? radiation ???
Saturday, April 23, 2016 by Boberto

Chemistry
Calculate the concentrations of Cd2 +, [Cd (CN) 42] and CN at equilibrium when they dissolve 0, 42mol of Cd(NO3)2, molarity= 2.50 M Kf =7.1x10^16
Saturday, April 23, 2016 by Victor

Chemistry
What mass of CaO, can get by the decomposition of 250 g of CaCo3 with 80% purity?
Saturday, April 23, 2016 by Adam

chemistry lab
so i'm trying to finish my lab and im trying to solve for the concentration, and the lab handout says "remember all the cl- from the original sample ended up in 100 mL of solution" The concentration i solved for (from my graph) was 9.8 ppm Cl....how would i use a...
Saturday, April 23, 2016 by Anonymous

chemistry
Hi, I am trying to find the pH of a buffer I created and then added NaOH to. This is my data: total volume of solution 34.2 mL [NaOH] before reaction 6.0 [HOAc] before reaction .8 M [OAc-] before reaction .4 M [HOAc] after reaction 0 M [OAc-] after reaction 5.2 M So, how would...
Saturday, April 23, 2016 by anon

Chemistry
A flask initially contains 2.00 atm of NH3, 2.00 atm of N2, and 3.00 atm of H2 at 673 Kelvin. -What is the delta G for the reaction? -What is the equilibrium partial pressures of each gas at 673 Kelvin? So I figured out how to do the first question with relevant values: : ...
Saturday, April 23, 2016 by Chris

Chemistry
A reaction between gaseous sulfur dioxide and oxygen gas to produce gaseous sulfur trioxide takes place at 600◦C. At that temperature, the concentration of SO2 is found to be 1.14 mol/L, the concentration of O2 is 1.39 mol/L, and the concentration of SO3 is 3.18 mol/L. ...
Saturday, April 23, 2016 by Olivia

Chemistry
At equilibrium at 1.0 L vessel contains 22.00 mol of H2, 20.00 mol of CO2, 13.00 mol of H2O, and 5.700 mol of CO at 427◦C. CO2(g) + H2(g) ⇀↽ CO(g) + H2O(g) What is the value of K at this temperature for the reaction?
Saturday, April 23, 2016 by John

Chemistry
At 350 K, Kc = 0.142 for the reaction 2 BrCl(g) ⇀↽ Br2(g) + Cl2(g) An equilibrium mixture at this temperature contains equal concentrations of bromine and chlorine, 0.077 mol/L. What is the equilibrium concentration of BrCl?
Saturday, April 23, 2016 by Matthew

Chemistry
For the reaction H2(g) + I2(g) ⇀↽ 2 HI(g) at 425◦C, calculate [HI], given [H2] = [I2] = 0.000617 mol/L and K = 54.3.
Saturday, April 23, 2016 by Claire

BIO chemistry
What is the pH of a mixture of 0.042M NaH2PO4 and 0.054M Na2HPO4
Saturday, April 23, 2016 by umar Ahmad !@#$%^&u

Chemistry
In the lab we synthesised nickel (II) ammine tetraflouroborate using hydrated nickel chloride and ammonia then this solution was added to a slotion of ammonia and ammonium tetraflouroborate,now im struggling to write a fully balanced chemical reaction.Would anyone please help ...
Saturday, April 23, 2016 by Sikhulile

Chemistry
In the lab we synthesised nickel (II) ammine tetraflouroborate using hydrated nickel chloride and ammonia then this solution was added to a slotion of ammonia and ammonium tetraflouroborate,now im struggling to write a fully balanced chemical reaction.Would anyone please help ...
Saturday, April 23, 2016 by Sikhulile

Chemistry
Which of the following is a stronger lewis base: cyanide ion or dicarbide ion? I'm assuming it is the dicarbide ion as it is more negatively charged and a compound consisting of 2 carbons is larger and therefore more likely to lose electrons than something consisting of ...
Friday, April 22, 2016 by Kevin

AP Chemistry
The normal boiling point of methanol is 64.7°C. A solution containing a nonvolatile solute dissolved in methanol has a vapor pressure of 642.3 torr at 64.7°C. What is the mole fraction of methanol in this solution?
Friday, April 22, 2016 by Anonymous

Chemistry
On Standardization of 10 mL of NaOH approximately 0, 1 m with HCl, 9.5 mL of spent acid. Knowing that this acid was standardized with 5 mL of Na2CO3 0,05 m 0 where spent 4.8 mL determine the Molarity of HCl used and Molarity found to NaOH.
Friday, April 22, 2016 by Vitoria

chemistry
I hve a eq. Plzz tell me the product. Acetylene rects with H2S presence of Al2O3 with 400℃.
Friday, April 22, 2016 by tripti

Chemistry
Calculate the heat released when 42.0 g of water at 35.0 degrees Celsius is converted to ice at -5.0 degrees Celsius. The specific heat of ice is 2.03 J/(g C), the molar heat of fusion of ice is 6010 J/mol, and the specific heat of water is 4.18 J/(g C) (Hint: Be sure to ...
Friday, April 22, 2016 by Kiana

Chemistry
What is the solubility, in moles/liter, of PbCl2 if the Ksp =7.3 x 10^12
Friday, April 22, 2016 by Cadele

Chemistry
How do I answer this question? The average rate of disappearance of ozone in the reaction 2O3 --> 3O2 is found to be 8.12 x 10^-3 molecules over 15 seconds. What is the rate of appearance of O2 during this interval?
Friday, April 22, 2016 by Rose

chemistry
Consider the following reaction. 2 CO (g) + O2 (g) −→ 2 CO2 (g) What is most likely true about the entropy change for this reaction? Why would the delta s of the rxn be less than zero? thanks.
Friday, April 22, 2016 by anon

Chemistry
Which of the following has the highest boiling point? (Think of intermolecular forces) CHCl3, CH4, CH2Cl2, CH2I2, CHBr3, CHI3 Ive tried to answer this question twice and have one attempt left. Here's what I've done: CHCl3 -Boiling Point: -61.2 Degrees C -Molar Mass: ...
Friday, April 22, 2016 by Kiana

Chemistry
Consider the following reaction. 2 CO (g) + O2 (g) −→ 2 CO2 (g) What is most likely true about the entropy change for this reaction? Delta Srxn < 0 or Delta Srxn > 0. Why is it Delta Srxn < 0 ?
Friday, April 22, 2016 by Sam

Chemistry
How do you do the question: react 3.50 g of solid sodium metal with water to produce hydrogen gas and sodium hydroxide. If,at the end of the reaction there is 6.8 L of solution, what is the concentration of sodium hydroxide? This is realy quite urgent. I need to know for my ...
Friday, April 22, 2016 by Mr. Clueless

Chemistry
The pH of human blood needs to be between 7.35 and 7.45. You want to prepare a buffer solution that gives a pH of 7.40. You decide to use a sodium phosphate buffer: the acid is H2PO− 4 and the conjugate base is HPO2− 4 . You want the concentration of the acid to be...
Friday, April 22, 2016 by Emily

Chemistry
use the appropriate standard reduction potentials in the appendix of your book to determine the equilibrium constant at 285 K for the following reaction under acidic conditions 4H+(aq) + MnO2(s)+2Fe+2(aq)----> Mn+2 (aq)+2Fe3+(aq)+2H2O(l)
Friday, April 22, 2016 by Olivia

Chemistry
use the appropriate standard reduction potentials in the appendix of your book to determine the equilibrium constant at 285 K for the following reaction under acidic conditions 4H+(aq) + MnO2(s)+2Fe+2(aq)----> Mn+2 (aq)+2Fe3+(aq)+2H2O(l)
Friday, April 22, 2016 by Olivia

chemistry
Disilane gas undergoes combustion to form solid silicon dioxide and water
Friday, April 22, 2016 by Anonymous

chemistry
In an experiment, 95.0 mL of 0.225 M silver nitrate was mixed rapidly with 47.5 mL of 0.225 M calcium chloride in a coffee cup calorimeter. If a reaction occurred, was it exothermic or endothermic? If the reaction started at 23.7 °C, what is the final temperature of the ...
Friday, April 22, 2016 by -

chemistry
A 0.039 M solution of a weak acid (HA) has a pH of 4.28. What is the Ka of the acid?
Friday, April 22, 2016 by Syahira

Chemistry
4.13 grams of magnesium chloride were recovered after the chemical reaction between magnesium and chlorine gas occurred. If 7.10 grams of magnesium chloride was suppose to be produced, what is the percent yield of magnesium chloride?
Friday, April 22, 2016 by Christian

chemistry
to what temperature must a given mass of nitrogen at zero degree be heated so that both it volume and pressure will be doubled
Friday, April 22, 2016 by YUZARSIF

Chemistry
Which of the following is an endothermic reaction - rusting a nail in water - a cold pack, cooling - mixing strong hydrochloric acid and strong ammonium hydroxide - a heat pack
Thursday, April 21, 2016 by Alois

Chemistry
calculate the molarity of a NaOH solution that requires 42.55 mL to neutralize 3.53 grams of KHP
Thursday, April 21, 2016 by Klem

Chemistry
A type of hea that involves heated fluids, such as liquids or gases, moving and flowing is called?? Convection???
Thursday, April 21, 2016 by Boberto

Chemistry
A type of heat that involves no contact at all would be ?? Radiation
Thursday, April 21, 2016 by Boberto

Chemistry
A 500 mL buffer solution is 0.1 M benzoic acid and 0.10 M in sodium benzoate and has an initial pH of 4.19. What is the pH of the buffer upon addition of 0.010 mol of NaOH?
Thursday, April 21, 2016 by Nevaeh

Chemistry
A drop of liquid is about 0.05 mL. When doing a titration lab, 73 drops of base were used to reach end point; how many liters of base were required to neutralize the acid?
Thursday, April 21, 2016 by Bernice

Chemistry<--------
Sulfur dioxide in the effluent gases from coal-burning electric power plants is one of the principal causes of acid rain. One method for reducing SO2 emissions involves partial reduction ofSO2 to H2S followed by catalytic conversion of the H2S and the remaining SO2 to ...
Thursday, April 21, 2016 by Tyler

Chemistry -Dr.Bob222
Arrange the solutions in order of increasing acidity. NaCl, NH4Cl, NaHCO3, NH4CLO2, NaOH
Thursday, April 21, 2016 by Nevaeh

Chemistry
how many liters of CO2 and water vapor are produced by burning .3 liters of C2H2 (Acetylene) with .75 liters of O2? The balanced equation is: 2C2H2 + 5O2 = 2 H2O + 4CO2
Thursday, April 21, 2016 by Molly

Chemistry
2.16 grams of silver react with 3.20 grans of sulfur.Caculate the mass of silver sulfide produced (mass of ag=108.8g/mole)
Thursday, April 21, 2016 by GLORIA

Chemistry
Determine the pH of a solution made by diluting 25mL of 6.0 M HCl until the final volume of the solution is 1.75 L
Thursday, April 21, 2016 by Dylan

Chemistry - Answer Check
Find the molarity given 1.5 Liters of solution containing 62.5 g MgO. - 1.03 M Mgo There are 0.32 Liters of a 2.5 M HF solution. How many moles and grams of hydrofluoric acid are there? - 0.8 mol and 16 grams
Thursday, April 21, 2016 by Anonymous

Chemistry
A rigid container of O2 has a pressure of 3.9 atm at a temperature of 700 K. What is the pressure at 273 K?
Thursday, April 21, 2016 by Ashly

chemistry
aluminum metal combines with 22.40 liters of oxyen gas to form solid aluminum oxide
Thursday, April 21, 2016 by queen

Chemistry
How does changing the volume of strontium nitrate solution, added to 8 cm3 of sodium carbonate solution, affect the amount of precipitate formed? Is it the more the strontium nitrate solution is increased, the more precipate formed?
Thursday, April 21, 2016 by Ariana

chemistry
who prepaire tris buffer 0.2 mmol/lit calculation
Thursday, April 21, 2016 by rakesh

chemistry
Write the equilibrium constant expression for the reaction 2 NO (g) + Br2 (g) ↔ 2 NOBr (g)
Thursday, April 21, 2016 by Emilie

chemistry
Calculate the minimum volume oxygen gas that is required for the complete combustion of a mixture of 20cm carbon monoxide and hydrogen gas
Thursday, April 21, 2016 by lawal

Chemistry
Titration of 12.50 mL of HCl solution requires 22.50 mL of 0.1250 M NaOH solution. What is the molarity of the HCl solution?
Wednesday, April 20, 2016 by GraceW1

chemistry
How many joules of heat are removed to completely covert 80.0 grams of water to ice at zero Celcius? For water: c = 4.179 J/g °C Hfusion = 333.528J/g Hvap = 2258.601 J/g
Wednesday, April 20, 2016 by susan

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

Chemistry
Like a equilibrium constants, the values of Kw depends on temperature. At body temperature (37 C), Kw= 2.4 x 10^-14. What are the [H3O+] and pH of pure water at body temperature?
Wednesday, April 20, 2016 by Nevaeh

Chemistry
The equation for fermentation of glucose to alcohol and carbon dioxide is C6H12O6= 2C2H5OH + 2CO2 The enthalpy for the reaction is -67kj. Is the reaction endothermic or exothermic? Is the heat energy absorbed or released as the reaction occurs? I think its endothermic but im ...
Wednesday, April 20, 2016 by Megan

Advanced Chemistry
he vapor pressures of several solutions of water-propanol(Ch3Ch2Ch2OH) were determined at various compositions, with thefollowing data collected at 45C: XH2O Vapor pressure (torr) 0 74.0 .15 77.3 .37 80.2 .54 81.6 .69 80.6 .83 78.2 1.00 71.9 a.) Are solutions of water and ...
Wednesday, April 20, 2016 by Anonymous

chemistry
What is the main factor driving the difference in the spontaneity of the three reactions Cl^2,Br^2, and l^2?
Wednesday, April 20, 2016 by Linda

Chemistry
Calculate the total amount of heat that must be added to convert 15.7g of ice at its melting point to steam at 100.0°C
Wednesday, April 20, 2016 by Brian

Chemistry- Dr.Bob222
Determine [H30+], [OH-], and pH. A solution that is 0.655% HNO3 by mass (assume a density of 1.01 g/ mL for the solution).
Wednesday, April 20, 2016 by Nevaeh

  1. Pages:
  2. <<Prev
  3. 1
  4. 2
  5. 3
  6. 4
  7. 5
  8. 6
  9. 7
  10. 8
  11. 9
  12. 10
  13. 11
  14. 12
  15. 13
  16. 14
  17. 15
  18. Next>>

Homework Help: Science