Thursday
October 2, 2014

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

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chemistry
What amount of current, in amperes, would be required to deposit 19.7 g of Au metal in 1.00 hour from a solution of Au(NO3)3?
Friday, May 2, 2014 at 3:25pm

Chemistry
Solid titanium oxide (TiO2) reacts with solid carbon (C) to produce solid titanium (Ti) and gaseous carbon monoxide (CO). When 14.0 kg of C is allowed to react with 44.0 kg of TiO2 7.5 kg of Ti is produced. What is the theoretical yield of Ti expressed in mass and the percent ...
Friday, May 2, 2014 at 3:11pm

chemistry
Calculate the amount of CO2 formed when 50 grams of CaCO3 decomposes?
Friday, May 2, 2014 at 12:03pm

chemistry chem science
A portable CD player that draws 160 milliamperes of current is powered by Ni-Cd rechargable batteries. Compute the mass of Cd consumed when a disk is played for 35 minutes. (enter your answer in grams)
Friday, May 2, 2014 at 10:37am

chemistry
Consider the following standard reduction potentials of some commonly used metals: ξo (V) Au3+ (aq) + 3 e- → Au (s) +1.50 Ag+ (aq) + e- → Ag (s) +0.80 Cu2+ (aq) + 2e- → Cu (s) +0.34 Fe3+ (aq) + 3e- → Fe (s) -0.036V Al3+ (aq) + 3e- → Al (s) -1...
Friday, May 2, 2014 at 10:22am

Chemistry 1
Which of the following solutions will have highest freezing point? A. 0.1M KCl B. 0.05M NaCl C. 1M AlPO4 D. 0.1MMgSO4 ? i need it urgently ... pls help...!!!
Friday, May 2, 2014 at 6:29am

chemistry
3 moles of an ideal gas initially at a pressure of 1 atm and a temprature of 100°C are expanded to twice the initial volume and then heated to 200°C at the new volume.What is the final pressure in atm?
Friday, May 2, 2014 at 6:02am

Chemistry
Automobile batteries use 3.0 M H2SO4 as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225mL of battery acid?
Friday, May 2, 2014 at 2:56am

Chemistry
What is the molality of the solution that results when 33.3g of C2H5OH are added to 76.7g of water?
Friday, May 2, 2014 at 2:23am

Chemistry
How many litters of Oxygen will be required to burn 3.8 liters of propane, C3H8?
Friday, May 2, 2014 at 1:53am

Chemistry
A 0.5 molal urea solution causes freezing point depression of two degrees .what is the molal delression constant ????
Friday, May 2, 2014 at 1:24am

chemistry
Use the following pair of reduction half-reactions to design a galvanic cell. Then write in the proper coefficient for each of the species involved in the overall reaction. Water molecules and protons are not shown in the half-reactions, but may be needed in the overall ...
Friday, May 2, 2014 at 12:14am

Chemistry- is this correct?
50.0 ml of .30 KOH are required to titrate 60.0 ml of H2SO4. What is the M of the H2SO4? Is .13 correct?
Thursday, May 1, 2014 at 11:26pm

chemistry
For which salt, K2SO4, Li2SO4, KClO4, or NH4Cl, will increasing the temperature of the water have the greatest change in solubility per 100 g solvent?
Thursday, May 1, 2014 at 10:19pm

Chemistry
Calculate the grams of NaNO3 required to produce 5L of oxygen at STP if the percent yield of the reaction is 78.4%?
Thursday, May 1, 2014 at 9:52pm

chemistry
what will be the pressure of 0.010m of oxygen gas in a 4.5L flask at a temperature of 10,000C?
Thursday, May 1, 2014 at 9:42pm

Chemistry
What volume of each solution contains 0.220mol of NaI? a.) 0.142M NaI b.) 0.902M NaI c.) 1.61M NaI
Thursday, May 1, 2014 at 9:26pm

Chemistry
A 5.0−L sample of a 5.4M NaCl solution is diluted to 70L . What is the molarity of the diluted solution? How would you set this up and answer it?
Thursday, May 1, 2014 at 9:23pm

Chemistry
I'm not sure how to answer this question and how to set it up. To what volume should you dilute 90mL of a 10.5M H2SO4 solution to obtain a 1.65M H2SO4 solution?
Thursday, May 1, 2014 at 9:22pm

Chemistry
Aniline, C6H5NH2, is a weak base. If the hydroxide ion concentration of a 0.223 M solution is 9.7 10-6 M, what is the ionization constant for the base?
Thursday, May 1, 2014 at 8:29pm

chemistry
A Can of CO2 contains 5.75gmolecules of CO2. Calculate (a)number of moles of CO2 (b) mass of CO2.
Thursday, May 1, 2014 at 8:22pm

chemistry
Kc for the decomposition of ammonium hydrogen sulfide is 1.8 x 10-4 at 15oC. a. When 5.00 grams of the pure salt decomposes in a sealed 3.0 L flask at 15oC, what are the equilibrium concentrations of NH3 and H2S? b. What are the equilibrium concentrations of the products at ...
Thursday, May 1, 2014 at 7:59pm

Chemistry
100.0 ml of 0.25 M HCL are required to titrate 65 ml of NaOH. What is the M of the NaOH?
Thursday, May 1, 2014 at 7:32pm

Chemistry
A small pebble is heated and placed in a foam cup calorimeter containing water at 25 °C. The water reaches a maximum temperature of 27 °C. If the pebble released 532.1 J of heat to the water, what mass (in g) of water was in the calorimeter? can you show me what ...
Thursday, May 1, 2014 at 7:20pm

Chemistry
Just two more to check, thanks! 1) The pH of a 1.25 M solution of unknown monoprotic acid is 5.43. Determine the value of Ka for this acid. HX <--> H+ + X-. (I obtain 1.0 x 10^-11) 2) Calculate the pH of a solution which is 0.73 M benzoic acid. Ka = 6.5 x 10-5, HC7H5O2 &...
Thursday, May 1, 2014 at 5:07pm

Chemistry
The following reaction is reactant-favored at equilibrium at room temperature. COCl2(g) -> CO(g) + Cl2(g) Will raising or lowering the temperature make it product-favored?
Thursday, May 1, 2014 at 4:39pm

Chemistry
1) Which ion(s) below would undergo hydrolysis in water? A) Cl- B) K+ C) NH4+ D) NO3- E) Two of the above My guess is C, but I'm not too sure about this one. 2) Calculate the [OH-] present in solution labeled 1.73 M methylamine. CH3NH3 + H2O --> CH3NH3+ + OH-. I get 2....
Thursday, May 1, 2014 at 4:02pm

chemistry
Why is water essential to living things? A. Water is essential because it is an inorganic compound. B. Water is essential because it contains hydrogen and oxygen atoms. C. Water is essential to many of the chemical reactions that occur in the body. D. Water is essential ...
Thursday, May 1, 2014 at 3:43pm

Chemistry
How do I find delta S of 2 Na(s) + 2H2O(l) -> 2NaOH(aq) +H2(g)? I tried to find it using this.... ^Srxn= 2S(NaOH) - S(H2) -2S(Na) - 2S(H2O) = 2(48.1)-130.7 - 2(51.21) - 2(69.95) = 96.2 - 130.7 - 102.42 - 139.9 = -279.82 Where did I go wrong??
Thursday, May 1, 2014 at 3:40pm

Chemistry
A sample of nitrogen occupies a volume of 300ml under a pressure of 380 torr at -177C. What would be the volume at STP? I know the answer is 430mL but I don't know which equations to use to formulate the calculation.
Thursday, May 1, 2014 at 3:34pm

college chemistry
What is the free energy change at 25°C for the reaction below, if ΔGfo(CH4(g) = -50.790 kJ/mol, ΔGfo(C7H14(g)) is 95.887 kJ/mol. C7H14(g) + 7H2(g) ↔ 7CH4(g) similar question but gives some different G's
Thursday, May 1, 2014 at 3:31pm

College chemistry
From the reaction below, calculate the free energy of formation for C3H6(g) at 25°C, if ΔGfo(CH4(g)) is -50.790 kJ/mol. 3CH4(g) ↔ C3H6(g) + 3H2(g) ΔGo = 215.302 kJ/mol i've tried doing final-initial, and products minus reactants but i'm not getting ...
Thursday, May 1, 2014 at 3:29pm

Chemistry
Write the half cell reactions of the following? 1) Cu/Cu^2+(0.1M)//Ag^+(0.1M)/Ag 2) Zn/Zn^2+ (0.1M)//Cu^2+(0.1M)/Cu 3) Zn/Zn^2+(0.1M)//Ag^+(0.1M)/Ag 4) Zn/Zn(NH3)4^2+*0.5M)//Ag^+(0.1M)/Ag 5) Zn^2+(aq)+4NH3(aq) <--> ...show more Also, around what range of numerical ...
Thursday, May 1, 2014 at 3:27pm

chemistry
1.50 mol sample of helium at a certain pressure and temperature has a volume of 31.4 L. a second sample of helium at the same temperature and pressure has a volume of 42.4 L. Therefore the second sample contains how many moles of helium?
Wednesday, April 30, 2014 at 11:15pm

Chemistry
A small pebble is heated and placed in a foam cup calorimeter containing water at 25 °C. The water reaches a maximum temperature of 27 °C. If the pebble released 532.1 J of heat to the water, what mass (in g) of water was in the calorimeter?
Wednesday, April 30, 2014 at 9:33pm

Chemistry
If 82.4 g of cold water (initially at 22 °C) is mixed in an insulated container with 96 g of hot water (initially at 88 °C), what will be the final temperature of the water in °C?
Wednesday, April 30, 2014 at 9:31pm

Science(chemistry)
how much energy is needed to change 53 grams of water from -53 degrees celsius to 160 degrees celsius ?
Wednesday, April 30, 2014 at 9:20pm

Chemistry - check answers
1) Which of the following sets is arranged according to increasing base strength? A) F-, OH-, Cl- B) F-, Cl-, OH- C) OH-, F-, Cl- D) OH-, Cl-, F- E) Cl-, F-, OH- (my answer) 2) What is the pH of a solution formed by adding 4.3 x 10^-5 moles of KOH in 1 L of water? A) 4.3 x 10...
Wednesday, April 30, 2014 at 8:33pm

Chemistry
Calculate the pH of the resulting solution if 25.0 mL of 0.250 M HCl(aq) is added to (a) 35.0 mL of 0.250 M NaOH(aq). (b) 15.0 mL of 0.350 M NaOH(aq).
Wednesday, April 30, 2014 at 7:42pm

chemistry
if 7 moles O2 are used, houch energy is produced?
Wednesday, April 30, 2014 at 7:27pm

Chemistry
Calculate the change in pH when 5.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq). (I have several problems like this can some one work this through for me as a base line)?
Wednesday, April 30, 2014 at 5:04pm

CHEMISTRY HELP !!!!
Cell Designation : E (measured) = Sn I Sn^2+ II Cu^2+ I Cu Temp= 3 Celsius Temp= 276.15 Kelvin Delta G= ????? Show work please!!!!
Wednesday, April 30, 2014 at 4:57pm

CHEMISTRY HELP !!!!
Pb I Pb^2+ (1M) II Cu^2+ (1M) I Cu Temp.= room temp E cell (measured) = delta (calculated) =??? Keq (calculated) =???? Please show steps so I can do the rest. show calculations for delta G and Keq for an exemplary pair. For Pb I Pb^2+ II Sn^2+ I Sn Thank you!
Wednesday, April 30, 2014 at 4:55pm

Chemistry
Balance the redox equation. It occurs in acid solution. Sn(s) + H+(aq) = Sn2+(aq) + H2(g) I understand that first the equation needs to be put into halves. Sn(s) = Sn2+(aq) and H+(aq) = H2(g) Then, Sn(s) = Sn2+(aq) + 2e- and ? From here I am lost. Please help.
Wednesday, April 30, 2014 at 2:54pm

Chemistry
The following reaction is reactant-favored at equilibrium at room temperature. COCl2(g) = CO(g) + Cl2(g) Will raising or lowering the temperature make it product-favored?
Wednesday, April 30, 2014 at 2:44pm

Chemistry
The standard free energy change, delta f G, for the formation of NO (g) from its elements is +86.58 kJ/mol at 25 degrees C. Calculate Kp at this temperature for the equilibrium 1/2 N2(g) + 1/2 O2(g) = NO(g) Comment on the sign of delta G and the magnitude of Kp.
Wednesday, April 30, 2014 at 2:42pm

Chemistry
Which substance has the higher entropy? a.) a sample of pure silicon (to be used in a computer chip)or a piece of silicon containing a trace of another element such as boron or phosphorus b.) O2(g) at 0 degrees C or O2(g) at -50 degrees C c.) I2(s) or I2(g), both at room ...
Wednesday, April 30, 2014 at 2:35pm

Chemistry
Please help me write these two balanced equations. Dissolution of rust, Fe2O3, by sulfuric acid. and Ammonium nitrite reacts with oxygen to form ammonium nitrate. Any help would be awesome, thankyou.
Wednesday, April 30, 2014 at 1:41pm

Chemistry
Please help!! I am so lost!! calculate the number of moles in 100g each: PbCl2 K2SO4 HNO3 CH3CH2OH V2O5 Thankyou!!
Wednesday, April 30, 2014 at 1:08pm

Chemistry
what is the specific heat of an unknown substance of 2000 j of energy required to raise the temperature of 4 grams of substances 5 degrees celsius
Wednesday, April 30, 2014 at 11:54am

Chemistry
How would you write the net ionic equation for [Co (en) 2Cl2]Cl with AgNO3. Is it AgNO3 ----> Cl^- + 3Ag^+?
Wednesday, April 30, 2014 at 1:49am

chemistry
What volume of a 0.500 M solution should be diluted to make 250 mL of a 0.400 M solution?
Wednesday, April 30, 2014 at 1:17am

Chemistry
If you measured vitamin C in the solution prepared from a vitamin C tablet, calculate how much vitamin C was in the tablet (show your work) and compare that with the amount claimed to be in the tablet given on the label. [Note: You dissolved the tablet in 200 mL of water, so ...
Tuesday, April 29, 2014 at 10:43pm

chemistry
How many kilograms of H2O must be added to 76.0 g of Ca(NO3)2 to form a 0.509 m solution?
Tuesday, April 29, 2014 at 10:00pm

Chemistry
1) In the reaction NaOH + H2O --> Na+ + OH-, sodium hydroxide is the: A) Lewis acid B) Brønsted-Lowry acid C) Arrhenius base D) Amphoteric substance E) None of the above (I think it's C) 2) The conjugate acid of the sulfide ion is: A) S^2- B) HS- C) H2S D) H3S+ E...
Tuesday, April 29, 2014 at 9:21pm

Chemistry
Would it take more 0.1 M HCl or 0.1 M H2SO4 to neutralize 30 ml of NaOH?
Tuesday, April 29, 2014 at 7:43pm

college chemistry
Consider the following equation: 4 NH3(g) + 5 O2(g)= 4 NO(g) + 6 H2O(s) a) HOw many liters of oxygen are required to react with 205 L NH3? Both gases are STP. b)How many grams of water vapor can be produced from 25 L NH3 if both gases are STP? c) How many liters of NO can be ...
Tuesday, April 29, 2014 at 7:38pm

chemistry
How many moles of O2 are contained in 5025 L at 26 degrees Celsius and 1.2 atm
Tuesday, April 29, 2014 at 7:29pm

chemistry
At 22 degrees Celsius and 729 torr pressure, what will be the volume of 75 mol of NH3 gas?
Tuesday, April 29, 2014 at 7:20pm

chemistry
How many minutes are needed to plate out 29.00g Mg from molten MgCl2, using 2.70A of current?
Tuesday, April 29, 2014 at 5:52pm

chemistry
How many milliliter of 2.5 M NaOH are neededto neutralize 2.7 ml of a 4.9 M H2SO4 solution?
Tuesday, April 29, 2014 at 5:37pm

Chemistry
Provide equations for each of the following: a. Dissociation of a strong base in water solution b. Ionization of a strong acid in water solution: c. Ionization of a weak acid in water solution: d. Ionization of a weak base in water solution: e. Autoionization of water:
Tuesday, April 29, 2014 at 4:38pm

Chemistry
Classify each of the compounds below as strong or weak acids, strong or weak bases, or salts: A. HCl B. KOH C. NH4NO3 D. H2SO4 E. NH4OH F. H3PO4 G. NaOH H. HClO4 i. Mg(OH)2 J. H2CO3 K. BaSO4 l. HC2H3O2 The numbers are sub(little numbers
Tuesday, April 29, 2014 at 4:24pm

Chemistry URGENT
Could someone let me know if I answered these questions? 1. How do you classify the liquid pair mineral oil -- H2O, miscible or immiscible? I believe the answer is immiscible because oil and water do not mix. 2. what would be the Molarity of a solution containing 0.5 mole of ...
Tuesday, April 29, 2014 at 3:50pm

Chemistry
Calculate [H3O+] in the following aqueous solution at 25 ∘C: [OH−]= 1.9×10−9M Calculate [H3O+] in the following aqueous solution at 25 ∘C: [OH−]= 2.1×10−2M Calculate [H3O+] in the following aqueous solution at 25 ∘C: [OH&#...
Tuesday, April 29, 2014 at 11:12am

Chemìstry
The following two solutions were combined and mixed well: 150.00 mL of a 3.500 M iron(¡¡¡) nitrate solution and 760.00mL of a 1.600M magnesium nitrate solution. 20.00mL of the final solution was transferred with a pipette into an empty 250.00mL volumetric ...
Tuesday, April 29, 2014 at 10:54am

Chemistry
The following two solutions were combined and mixed well: 150.00 mL of a 3.500 M iron(¡¡¡) nitrate solution and 760.00mL of a 1.600M magnesium nitrate solution. 20.00mL of the final solution was transferred with a pipette into an empty 250.00mL volumetric ...
Tuesday, April 29, 2014 at 10:53am

chemistry
pure water has a hydrogen ion concentration of 1 x 10-7 m and a ph of 7. a student measures a basic solution and finds that it has a hydrogen ion (H+) concentration of 1 x 10-3. explain why the student must have an error in her statement
Tuesday, April 29, 2014 at 9:13am

Chemistry
Did I ionize Mn2(CO3)3 correctly? Mn2(CO3)3 --> 2Mn^(3+) + 3CO3^(2-)
Tuesday, April 29, 2014 at 2:11am

Chemistry
If a plant has 88.0 g carbon dioxide and 64.0g water available for photosynthesis determine: a the limiting reactant b. the excess reactant and the mass in excess c. the mass of glucose produced
Tuesday, April 29, 2014 at 12:13am

chemistry
The boiling point of another member of this homologous series was found to be 309 K \rm K. What is the likely molecular formula for this compound?
Monday, April 28, 2014 at 11:54pm

Chemistry
A saturated solution of magnesium iodate has a temperature of 50°C. it contains 175g of dissolved solute. What is the volume of the solution?
Monday, April 28, 2014 at 10:37pm

Chemistry
A system which undergoes an adiabatic change (i.e., q = 0) and has work done on it by the surroundings has a. w < 0, ΔU = 0 b. w < 0, ΔU < 0 c. w > 0, ΔU < 0 d. w > 0, ΔU > 0 e. w < 0, ΔU > 0
Monday, April 28, 2014 at 9:20pm

Chemistry
Hydrogen peroxide can act as either an oxidizing agent or a reducing agent, depending on the species present in solution. Write balanced half-reaction equations for each of the following: (a) H2O2(aq) acting as an oxidizing agent in an acidic solution. Write the balanced half-...
Monday, April 28, 2014 at 9:09pm

chemistry
what are three examples of a hypothesis? Or at least one....
Monday, April 28, 2014 at 8:53pm

chemistry
. A 0.428-gram sample of a mixture of the solids, KCl and KClO3, is heated. If 80.7 mL of oxygen gas is collected over water at 18.0 oC and 100.8 kPa, calculate the mass percentage of KClO3 in the mixture. (PH2O at 18.0 oC = 15.5 torr
Monday, April 28, 2014 at 6:40pm

Chemistry lab reports online?
Are there any websites with other students' lab reports with calculations online? I do not want to copy and am completely against plagiarism. I just want to look at others' examples to help in giving me ideas on how to write my own and make sure I have enough ...
Monday, April 28, 2014 at 6:38pm

Chemistry: Please check my work!I am stumped
When nitroglycerin (C3H5N3O9) explodes, it decomposes into the following gases: CO2, N2, NO, and H2O. If 239g of nitroglycerin explodes, what volume will the mixture of gaseous produces occupy at 1.00 atm pressure and 2678oC? a. Write a balanced equation for the reaction. b. ...
Monday, April 28, 2014 at 4:39pm

Science chemistry
How much mgs can be obtained from 20g of mg and 20 g of s by the reaction mg+s_>mgs
Monday, April 28, 2014 at 4:34pm

Chemistry: please help, I am stumped
When nitroglycerin (C3H5N3O9) explodes, it decomposes into the following gases: CO2, N2, NO, and H2O. If 239g of nitroglycerin explodes, what volume will the mixture of gaseous produces occupy at 1.00 atm pressure and 2678oC? a. Write a balanced equation for the reaction. b. ...
Monday, April 28, 2014 at 4:28pm

chemistry
Under standard conditions, the Gibbs free energy of the reactants G,std(reactants) in a reaction in the gas phase is 232.94 kJ and the Gibbs free energy of the products G,std(products) is 211.56 kJ. Calculate the value of the equilibrium constant for this reaction under ...
Monday, April 28, 2014 at 4:17pm

chemistry
1.00 of an aqueous solution contains 1.52g of a compound used in antifreeze. If the osmotic pressure of this solution at 20.0 degree C is 448 torr, calculate the molar mass of the antifreeze compound
Monday, April 28, 2014 at 12:22pm

chemistry
what is the boiling point of 0.212 m lactose in water?
Monday, April 28, 2014 at 12:16pm

chemistry
calculate the vapor pressure of a solution 0.53 mol of cholestrol in 4.1 molof toluene at 32 degree C. pure toluene has a vapor pressure of 41 torr at 32 degree C
Monday, April 28, 2014 at 12:15pm

chemistry
how many grams of hydrogen are needed to completely react with 8 moles of nitrogen from this equation N2+H2=NH3
Monday, April 28, 2014 at 8:34am

Chemistry
Balance the following equation for a half reaction that occurs in acidic solution. Use e– as the symbol for an electron. U^4+ --> UO2^+ There is a hint: In acidic solution, you may add H2O and H as needed to balance oxygen and hydrogen. When finished, don\'t forget...
Monday, April 28, 2014 at 6:42am

Chemistry
separate this redox reaction into its component half-reactions. O2 + 4Cu-->2CuO Oxidation half-reaction: ? Reduction half-reaction: ? I believe that the Oxidation is copper and that reduction is oxygen. So I tried to write it as 4Cu^+ --> 4Cu + 4e^- O2^2- +4e^- ---> ...
Monday, April 28, 2014 at 6:39am

Chemistry
Dear Sir DrBob22 Thank you for your response we have an oil well. the well column has been completed (filled up) with completion fluid of gasoline. we want to stimulate the well by 28% HCL. if 28% HCL is to be injected into the the well column, whether a chemical reaction will...
Monday, April 28, 2014 at 5:37am

Chemistry
use the data from this table of thermodynamic properties to calculate the maximum amount of work that can be obtained from the combustion of 1.00 moles of ethane, CH3CH3(g), at 25 °C and standard conditions. on the chart is said ethane(C2H6) is -84.0. In the hint it said ...
Monday, April 28, 2014 at 5:08am

Simple Chemistry
A.Write a brief procedure outling how would you prepare 250mL of a 0.150M solution of a CoCl2 from solid CoCl2 and distilled water b. Using the solution from part a and distilled water, how would you prepare 100ml of a 0.0600 M solution of CoCl2 C. What absorbance would you ...
Monday, April 28, 2014 at 4:46am

Chemistry
A reaction : A(aq)+B(aq) --> C(aq) has a standard free-energy change of –4.01 kJ/mol at 25 °C. What are the concentrations of A, B, and C at equilibrium if, at the beginning of the reaction, their concentrations are 0.30 M, 0.40 M, and 0 M, respectively? I used ...
Monday, April 28, 2014 at 4:33am

Chemistry URGENT/DR BOB
Hello Dr.Bob, the saturate at 60 degrees Celsius is 85.5g i hope this helps with the problem I posted at 12:49am thanking you in advance
Monday, April 28, 2014 at 1:49am

Chemistry URGENT
Help. what is the formula to figure out the total mass of a solution?
Monday, April 28, 2014 at 1:34am

Chemistry URGENT
can someone please tell me what formula's to use for the 2 following chemistry problems. 1. Calculate the solubility of potassium bromide at 23 degrees Celsius. hint. Assume that the solubility increases by an equal amount for each degrees between 20 degrees C and 30 ...
Monday, April 28, 2014 at 12:49am

Chemistry
what three substances are usually electrolytes?
Monday, April 28, 2014 at 12:17am

Chemistry
comparing and contrasting why is sodium hydrogen carbonate an effective antacid but sodium hydroxide is not?
Sunday, April 27, 2014 at 11:17pm

Chemistry
comparing and contrasting why is sodium hydrogen carbonate an effective antacid but sodium hydroxide is not?
Sunday, April 27, 2014 at 11:16pm

chemistry
By titration it is found that 20.5 mL of 0.168 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution
Sunday, April 27, 2014 at 11:02pm

chemistry
By titration it is found that 20.5 mL of 0.168 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution
Sunday, April 27, 2014 at 9:52pm

Chemistry
At what temperature (∘C) will xenon atoms have the same average speed that Cl2 molecules have at 35∘C?
Sunday, April 27, 2014 at 9:43pm

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