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September 20, 2014

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

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Chemistry
2CH3CH2CH2OH(l)+9O2(g)→6CO2(g)+8H2​O(g) I have to find the delta G delta G of CH3CH2CH2OH(l)=−360.5 KJ/Mol delta G of O2(g)=0 KJ/Mol delta G of CO2(g)=−394.4 KJ/Mol delta G of H20(g)=−228.6 KJ/Mol I keep getting -3426.2 KJ/Mol but its not correct.
Friday, June 21, 2013 at 1:44pm

Chemistry(Answer check)
A 0.1052 g sample of copper metal is dissolved in 55 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 208.5 mL. (Calculate the molarity of Cu2+.) 0.1052g*63.546/6.022e23 did I set it up right?
Friday, June 21, 2013 at 1:22pm

Chemistry
Calculate the equilibrium constant for the following reaction at room temperature, 25 ∘C: N2(g)+O2(g)→2NO(g)
Friday, June 21, 2013 at 1:03pm

Chemistry
A 0.1052 g sample of copper metal is dissolved in 55 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 208.5 mL. (Calculate the molarity of Cu2+.)
Friday, June 21, 2013 at 12:50pm

Chemistry
A 230.-mL sample of a 0.280 M CaCl2 solution is left on a hot plate overnight; the following morning, the solution is 1.10 M. What volume of water evaporated from the 0.280 M CaCl2 solution?
Friday, June 21, 2013 at 12:26pm

Chemistry
What mass of silver chloride can be prepared by the reaction of 160.0 mL of 0.26 M silver nitrate with 150.0 mL of 0.24 M calcium chloride? Also, Calculate the concentrations of each ion remaining in solution after precipitation is complete. Cl ‾ NO3‾ Ca2+
Friday, June 21, 2013 at 12:20pm

Chemistry
A 0.1052 g sample of copper metal is dissolved in 55 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 208.5 mL. (Calculate the molarity of Cu2+.)
Friday, June 21, 2013 at 12:16pm

Chemistry
Please help me what is the ionic equation for AgNO3(aq) + Na3PO4(aq)? Not sure what I'm doing wrong here is what I have so far 3Na^+(aq) + PO_4^-3(aq) + 3Ag^+(aq) +3NO^3-(aq) --> 3Na^+(aq) + 3NO^3-(aq) + Ag_3PO_4(s)
Friday, June 21, 2013 at 11:31am

Chemistry
What is the complete ionic equation for NaOH(aq) + Fe(NO3)3(aq)? I'm putting this on webassign, but it's telling me "One or more of your reactants appear to have an improper oxidation state. One or more of your products contains an improper oxidation state. 3Na...
Friday, June 21, 2013 at 11:21am

chemistry
1)nitrogen atom has atomic no 7 and mass no 14.hydrogen atom has atomic no 1 and mass no 1.what is no of protons and neutrons of ammonium ions
Friday, June 21, 2013 at 7:57am

Chemistry
Wha volum of steam is produced when log of propyrie is burnt in excess oxygen at s.t.p?
Friday, June 21, 2013 at 3:26am

Chemistry
Using the reaction and the E∘ given below 2Co^3+(aq)+2Cl^−(aq)→2Co^2+(​aq)+Cl2(g) E∘=0.46 V what is the cell potential at 25 ∘C if the concentration are [Co^3+]= 0.565M , [Co^2+]= 0.554M , and [Cl^−]= 0.838M and the pressure of Cl2 is ...
Friday, June 21, 2013 at 12:38am

Chemistry
A saturated solution of barium chloride at 30 degrees celcius contains 150g of water. How much additional barium chloride can be dissolved by heating this solution by heating this solution to 60 degrees. Solubility of Bacl @ 30 degrees=38.2g/100g water solubility of Bacl @ 60 ...
Thursday, June 20, 2013 at 11:08pm

Chemistry H
120 ml of a gas is in a flask at STP. If the gas is argon, what mass of gas is in the flask?
Thursday, June 20, 2013 at 11:05pm

Chemistry H
For the decomposition of aluminum oxide at 35 celsius and atm, what volume of oxygen gas will be produced if 2.77 grams of the oxide react?
Thursday, June 20, 2013 at 11:04pm

Chemistry
A saturated solution of barium chloride at 30 degrees celcius contains 150g of water. How much additional barium chloride can be dissolved by heating this solution by heating this solution to 60 degrees. Solubility of Bacl @ 30 degrees=38.2g/100g water solubility of Bacl @ 60 ...
Thursday, June 20, 2013 at 9:40pm

Chemistry H
Find the molality, mole fraction, and percent by mass of a solution prepared with 500 grams of C12h22O11 in 2000 grams of H20
Thursday, June 20, 2013 at 9:39pm

Chemistry H
60.0 grams of Th-210 with a half life of 50,000 years is allowed to decay for 250,000 years. How much of the original quantity remains? In addition, Th-210 decays via beta emission. Write the equation for its transmutation.
Thursday, June 20, 2013 at 9:38pm

Chemistry
A saturated solution of barium chloride at 30 degrees celcius contains 150g of water. How much additional barium chloride can be dissolved by heating this solution by heating this solution to 60 degrees. Solubility of Bacl @ 30 degrees=38.2g/100g water solubility of Bacl @ 60 ...
Thursday, June 20, 2013 at 9:20pm

Chemistry
How many kilocalories of heat are released when 125 g of water cools from 100.0oC to 19.5oC?
Thursday, June 20, 2013 at 6:10pm

chemistry
convert the know heat of fusion of water,334j/g to these units. the conversion between calories and joules is 1 cal = 4.184j
Thursday, June 20, 2013 at 6:04pm

Chemistry
A gas exerts a pressure of 350 mmHg in a sealed container. What will be its pressure if the temperature doubles
Thursday, June 20, 2013 at 12:59pm

Chemistry
Take two glass put 20 g sugar in 20 ml water in first glass and put 15g sugar in 15 ml water in second glass now check out which one will be more concentrated and find out molarity normality of both
Thursday, June 20, 2013 at 8:50am

Chemistry
Take two glass put 20 g sugar in 20 ml water in first glass and put 15g sugar in 15 ml water in second glass now check out which one will be more concentrated and find out molarity normality of both
Thursday, June 20, 2013 at 8:49am

Chemistry
When one gram of gas, is burned, 55.5kJ of heat are released. How many pounds of methane gas must be burned to release 2.578 x 10^3kJ of heat?
Wednesday, June 19, 2013 at 11:33pm

Chemistry
Calculate the standard enthalpy change for the following reaction at 25 °C. MgCl2(s) + H2o(l) ---> MgO(s) + 2HCl(g)
Wednesday, June 19, 2013 at 11:03pm

Chemistry
What is the heat of combustion of ethane, C2H6, in kilojoules per mole of ethane?
Wednesday, June 19, 2013 at 10:21pm

Chemistry
Determine the enthalpy of the following reaction. 2M(s) + 3Cl2(g) ---> 2MCl3(s)
Wednesday, June 19, 2013 at 10:18pm

chemistry
for a particular isomer C8H18, the following reaction produces 5113.3 kj of heat per mole of C8H18 consumed under standard conditions c8h18(g) + 25/2 O2 (g) ---> 8co2(g) + 9h2o(g) what is the standard enthalpy of formation of this isomer of c8h18? o2= 0 co2(g)= -393.5 h2o(g...
Wednesday, June 19, 2013 at 10:00pm

chemistry
The specific heat of aluminum is 0.214 cal/g·°C. Calculate the heat necessary to raise the temperature of 47.9 g of aluminum from 18.9°C to 62.2°C
Wednesday, June 19, 2013 at 9:37pm

Chemistry
Which of the following substances have a standard heat of formation of zero? O2 at 25.O degrees C and 1 atm Fe at 1200 degrees C C2H6 at standard conditions Cl2 at 2 atm
Wednesday, June 19, 2013 at 9:34pm

Chemistry
Reviewing for exams and completely forgot how to do this and looking back at my notes doesn't help for this one... Can you please explain how to assign oxidation numbers for Pb(OH)4^2- I guess what's confusing me is the hydroxide... I haven't come across brackets ...
Wednesday, June 19, 2013 at 7:08pm

CHEMISTRY
According to the equation H2SO4+2NH3 @(NH4)2SO4. What mass of ammonium sulfate will result from the reaction of 5.00 g of NH3?
Wednesday, June 19, 2013 at 6:31pm

Chemistry
Hi, I am doing a practice test for my chemistry final and I do not understand one of the answer they gave for this thermochemical equation question. I do not understand how they got 400kJ. The question is: Butane has a deltaH of -2871 kJ/mol when it undergoes complete ...
Wednesday, June 19, 2013 at 12:45pm

chemistry
Analysis of aluminum-zinc alloy Mass of gelatin capsule 0.1284 g ambient temp. 22c mass of capsule plus alloy sample 0.3432g ambient temp_________K mass of alloy sample, m__________g barometric pressure 745 mm Hg mass of empty beaker 144.5g Vapor pressure at H2O at ...
Wednesday, June 19, 2013 at 11:16am

Chemistry
Calculate the [H], [OH], pH and the pOH of this solution; 0.0025 M NaOH
Wednesday, June 19, 2013 at 7:02am

Chemistry
Consider a 67-g chunk of ice (∆Hfus = 6.0 kkJ/mol) in a beaker immersed in a water bath. To produce just enough heat to melt the ice, how many moles of solid NaOH (∆Hsoln = -445.1 kJ/mol) must you dissolve in the water bath? Please show all work. Thanks in advance.
Wednesday, June 19, 2013 at 2:50am

Chemistry
How many grams of NaCl are produced from 6 moles of Na?
Tuesday, June 18, 2013 at 8:58pm

Chemistry
At constant volume, the heat of combustion of a particular compound is –3547.0 kJ/mol. When 1.239 g of this compound (molar mass = 196.58 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 8.539 °C. What is the...
Tuesday, June 18, 2013 at 8:44pm

chemistry
the heat of vaporization for water is 540 cal/g. how many kilocalories are needed to change 22g of liquid water to steam at 100*c?
Tuesday, June 18, 2013 at 3:40pm

Chemistry
The temperature of a 12.58g sample of calcium carbonate increases from 23.6degrees celcius to 38.2 degrees celcius. If the heat capacity is 0.82J/g-K, how many Joules of heat are absorbed
Tuesday, June 18, 2013 at 9:37am

chemistry
just take H2O AND CH3CH2OH as example.why say that h2o can form two hydrogen bond per molecule but CH3CH2OH only one.i am confused as both of them also has two lone pairs per molecule,is it true that one hydrogen atom will result in only one hydrogen bond and two hydrogen bond...
Monday, June 17, 2013 at 10:41pm

Chemistry
What is the pH of a buffer solution that is made by adding 21.0 grams of sodium fluoride to 1.00 Liter of 0.15M hydrofluoric acid? (see the Table above for the Ka of hydrofluoric acid; calculate the pH to 2 decimal places) hint: you will have to find the molarity of NaF in ...
Monday, June 17, 2013 at 10:36pm

Chemistry
Cr2O72-(aq) + I-(aq) -->Cr3+(aq) + IO3-(aq) What is the oxidizing species and the reducing species?
Monday, June 17, 2013 at 9:55pm

Chemistry
Using your 0.0100M oxalate solution and only the equipment and supplies listed below, describe how to prepare a 0.00025M solution of oxalate. Note, you are not allowed to add volumes with pipettes. (example, if you want 20mLs, you can not use a 10mL + 10mL addition as this ...
Monday, June 17, 2013 at 9:46pm

chemistry
For the following reaction in acidic solution. Cr2O7^2- + I- ---> Cr^3+ + IO3- Give the total balanced net ionic equation.
Monday, June 17, 2013 at 4:56pm

chemistry
For the following reaction in acidic solution. Cr2O7^2- + I- ---> Cr^3+ + IO3- give the balanced half reduction reaction. Indicate the oxidizing species.
Monday, June 17, 2013 at 4:46pm

chemistry
0.125g of sodium dichromate is to be reacted wtih 0.025M potassium iodide. How many mLs of the potassium iodide solution will be needed. (Use your balanced equations above.)
Monday, June 17, 2013 at 4:41pm

chemistry
Using your 0.0100M oxalate solution and only the equipment and supplies listed below, describe how to prepare a 0.00025M solution of oxalate. Note, you are not allowed to add volumes with pipettes. (example, if you want 20mLs, you can not use a 10mL + 10mL addition as this ...
Monday, June 17, 2013 at 4:40pm

chemistry
The densities of three solutions with known concentrations ( 20% , 50%, and 70%), and one unknown solution were determined. If the densities of 20%, 50% and 70% solutions are 0.69 and 0.58 and 0.49 g/mL, respectively, and the denisty of the unknown solution is 0.50 g/mL, what ...
Monday, June 17, 2013 at 1:01pm

Chemistry
ALL ice melts at 0*C, but it requires MORE HEAT to melt 10g of ice than it would for 20g of ice. Why? I thought it was the opposite.
Monday, June 17, 2013 at 12:42am

Chemistry
How many milliliters of 2.00 M HCl(aq) are required to react with 7.55 g of an ore containing 36.0% Zn(s) by mass?
Sunday, June 16, 2013 at 11:42pm

Chemistry
Describe how to prepare a 0.0100M Solution of oxalate using solid sodium oxalate and a 500mL volumetric flask and water.
Sunday, June 16, 2013 at 10:29pm

Chemistry
Determine the theoretical and percent yield of hydrogen gas if 80.5 g water undergoes electrolysis to produce hydrogen and oxygen and 2.81 g hydrogen is collected. theoretical yield
Sunday, June 16, 2013 at 10:07pm

chemistry
What is the pH of a buffer solution that is made by adding 21.0 grams of sodium fluoride to 1.00 Liter of 0.15M hydrofluoric acid? (see the Table above for the Ka of hydrofluoric acid; calculate the pH to 2 decimal places) hint: you will have to find the molarity of NaF in ...
Sunday, June 16, 2013 at 9:41pm

chemistry
Liquid elemental iron is produced in the thermite reaction because enough heat is generated to melt the iron: 2 Al(s) + Fe2O3(s)----> Al2O3(s) + 2 Fe(l) What mass of aluminum is needed to produce 750 grams of iron?
Sunday, June 16, 2013 at 9:40pm

Chemistry
0.125g of sodium dichromate is to be reacted wtih 0.025M potassium iodide. How many mLs of the potassium iodide solution will be needed.
Sunday, June 16, 2013 at 9:40pm

chemistry
15. Liquid elemental iron is produced in the thermite reaction because enough heat is generated to melt the iron: 2 Al(s) + Fe2O3(s)----> Al2O3(s) + 2 Fe(l) What mass of aluminum is needed to produce 750 grams of iron?
Sunday, June 16, 2013 at 7:28pm

chemistry
What is the pH of a buffer solution that is made by adding 21.0 grams of sodium fluoride to 1.00 Liter of 0.15M hydrofluoric acid? (see the Table above for the Ka of hydrofluoric acid; calculate the pH to 2 decimal places) hint: you will have to find the molarity of NaF in ...
Sunday, June 16, 2013 at 6:17pm

Chemistry 11
calculate the mass of impure KOH needed to make up 1.20 L of 0.60 mol/L KOH(aq)? Assume the impure KOH is 84% KOH by mass and 16% water.
Sunday, June 16, 2013 at 5:13pm

chemistry
A 0.194 g sample of compound is vaporized to fill a 100.0 mL vessel at 750. torr and 100.C. What is the molar mass and molecular formula?
Sunday, June 16, 2013 at 2:17pm

Chemistry
What is the reaction for 2NH4I+Cl2=2NH4Cl+I2
Sunday, June 16, 2013 at 7:25am

Chemistry
2C6H6+X -> 12CO2+6H20 Find x Is x 30O?
Saturday, June 15, 2013 at 3:41pm

chemistry
What causes a tip that allows us to see the precessional period in NMR?
Saturday, June 15, 2013 at 10:12am

chemistry
200 ml of oxygen is collected over water at 18 degree Celsius and standard pressure, what will the volume of the dry oxygen be at STP?
Friday, June 14, 2013 at 9:51pm

Chemistry
The pH of 0.40 M HF(aq) is 1.93. Calculate the change in pH when 0.301 g of sodium fluoride is added to 53.7 mL of the solution. Ignore any change in volume.
Friday, June 14, 2013 at 9:19pm

chemistry
Suppose that 0.483 g of an unknown monoprotic weak acid, HA, is dissolved in water. Titration of the solution with 0.250 M NaOH(aq) required 42.0 mL to reach the stoichiometric point. After the addition of 21.0 mL, the pH of the solution was found to be 3.75. (a) What is the ...
Friday, June 14, 2013 at 9:19pm

Chemistry
What volume of 0.123 M NaOH(aq) must be added to 125 mL of 0.197 M H2SO3(aq) to reach the following points? (a) the first stoichiometric point (b) the second stoichiometric point
Friday, June 14, 2013 at 9:16pm

Chemistry
What volume of 0.123 M NaOH(aq) must be added to 125 mL of 0.197 M H2SO3(aq) to reach the following points? (a) the first stoichiometric point (b) the second stoichiometric point
Friday, June 14, 2013 at 9:16pm

Chemistry
636 grams of Na2CO3(s) are disolved in 3.0 liters of aqueous solution
Friday, June 14, 2013 at 3:32pm

chemistry
If 36 grams of water yield 4.0 grams of hydrogen gas after a chemical reaction, how many kilograms of hydrogen gas will you obtain from 4.35 x 10^4 milligrams of water?
Friday, June 14, 2013 at 4:19am

chemistry
The combustion of 1.00 g of gasoline releases 11100 cal of heat energy. Determine the number of megajoules (MJ) released when 1.75 gallons of gasoline is burned. (Density of gasoline = 0.740 g/mL)
Friday, June 14, 2013 at 2:39am

Melting Ice Chemistry
You have an ice cube (H2O) that weighs 5 grams and is at a temperature of -10 degrees Celsius. How much heat energy(in joules) is required to melt the ice cube and raise the temperature of the resulting liquid water to 15 degrees Celsius? A. 1803 J B. 2088.5 J C. 257.5 J D. ...
Friday, June 14, 2013 at 2:28am

Melting Ice Chemistry
You have an ice cube (H2O) that weighs 5 grams and is at a temperature of -10 degrees Celsius. How much heat energy(in joules) is required to melt the ice cube and raise the temperature of the resulting liquid water to 15 degrees Celsius? A. 1803 J B. 2088.5 J C. 257.5 J D. ...
Friday, June 14, 2013 at 2:06am

Melting Ice Chemistry
You have an ice cube (H2O) that weighs 5 grams and is at a temperature of -10 degrees Celsius. How much heat energy(in joules) is required to melt the ice cube and raise the temperature of the resulting liquid water to 15 degrees Celsius? A. 1803 J B. 2088.5 J C. 257.5 J D. ...
Friday, June 14, 2013 at 1:49am

Melting Ice Chemistry
You have an ice cube (H2O) that weighs 5 grams and is at a temperature of -10 degrees Celsius. How much heat energy(in joules) is required to melt the ice cube and raise the temperature of the resulting liquid water to 15 degrees Celsius? A. 1803 J B. 2088.5 J C. 257.5 J D. ...
Friday, June 14, 2013 at 1:43am

Melting Ice Chemistry
You have an ice cube (H2O) that weighs 5 grams and is at a temperature of -10 degrees Celsius. How much heat energy(in joules) is required to melt the ice cube and raise the temperature of the resulting liquid water to 15 degrees Celsius? A. 1803 J B. 2088.5 J C. 257.5 J D. ...
Friday, June 14, 2013 at 1:42am

Melting Ice Chemistry
You have an ice cube (H2O) that weighs 5 grams and is at a temperature of -10 degrees Celsius. How much heat energy(in joules) is required to melt the ice cube and raise the temperature of the resulting liquid water to 15 degrees Celsius? A. 1803 J B. 2088.5 J C. 257.5 J D. ...
Friday, June 14, 2013 at 1:32am

Chemistry
You have an ice cube (H2O) that weighs 5 grams and is at a temperature of -10 degrees Celsius. How many joules is required to melt the ice cube and raise the temperature of the resulting liquid water to 15 degrees Celsius? A. 1803 J B. 2088.5 J C. 257.5 J D. 418.2 J
Friday, June 14, 2013 at 1:30am

Chemistry
You have an ice cube (H2O) that weighs 5 grams and is at a temperature of 20 degrees Celsius. How many joules is required to melt the ice cube and raise the temperature of the resulting liquid water to 15 degrees Celsius? A. 1803 J B. 2088.5 J C. 257.5 J D. 418.2 J
Friday, June 14, 2013 at 1:29am

Chemistry
You have an ice cube (H2O) that weighs 5 grams and is at a temperature of 20 degrees Celsius. How many joules is required to melt the ice cube and raise the temperature of the resulting liquid water to 15 degrees Celsius? A. 1803 J B. 2088.5 J C. 257.5 J D. 418.2 J
Friday, June 14, 2013 at 1:28am

chemistry
In the reaction Mg (s) + 2HCl (aq) H2 (g) + MgCl2 (aq), how many liters of hydrogen gas will be produced from 75.0 milliliters of a 3.0 M HCl in an excess of Mg at STP?
Thursday, June 13, 2013 at 10:21am

Chemistry
How would you be able to recognise that C5H8 was an alkyne? And how would you know that CH3COCH3 was a ketone? (I thought it was an ether)
Thursday, June 13, 2013 at 12:13am

Chemistry
WOULD THE VOLUME OF A 0.10M NAOH SOLUTION NEEDED TO TITRATE25.0ML OF A 0.10M HNO2 ( A WEAK ACID)SOLUTION BE DIFFERENT FROMTHAT NEEDED TO TITRATE 25.0ML OF A 0.10M HCL (A STRONGACID)SOLUTION?
Wednesday, June 12, 2013 at 8:01pm

Chemistry
Apoarently the name of this compound is 4-ethyl-4-methylheptane: ........................CH3 ..........................| CH3-CH2-CH2-C-CH2-CH3 ..........................| .......................CH2 ..........................| .......................CH2...
Wednesday, June 12, 2013 at 7:41pm

Chemistry
I understood this at one point and now I'm confused again! :( What's the difference between 2,2-dimethyl and 2-ethyl? It's hard to find proper drawings online... For example, for naming CH3CH2C(CH3)2CH2NH2, Why wouldn't it be 2-ethyl-1-butanamine rather than 2,...
Wednesday, June 12, 2013 at 7:23pm

Chemistry
................CH3 ..................| CH3-CH2-N-CH2-CH2-CH3 Hoping this turns out okay, but it's an amine and branching off of the N (on top) is a CH3. The name is N-ethyl-N-methylpropanamine but I don't get why. How do you know which ones to treat as branches? I ...
Wednesday, June 12, 2013 at 7:03pm

chemistry
what is the solubility of sodium chloride in 750ml of water at 100°C
Wednesday, June 12, 2013 at 3:32pm

chemistry
Zn(s) + 2AgNO3(aq) = 2Ag(s) + Zn(NO3)2 (aq) It would require_____g of zinc to produce 5.40g of silver.
Wednesday, June 12, 2013 at 12:58pm

chemistry
An atom emits a photon of wavelength 1.08 meters. What is the energy change occurring in the atom due to this emission? (Planck's constant is 6.626 × 10È³Ê joule seconds, the speed of light is 2.998 × 10§ m/s)
Wednesday, June 12, 2013 at 9:07am

Chemistry
Sea water contains an average of 270 ppm of sulfate ion. Calculate the molar concentration of sulfate given that the average density of sea water is 1.02 g/ml. -At first i tried assuming that density is 1.00 g/ml which is a common practice in ppm problems but the answer is ...
Wednesday, June 12, 2013 at 8:54am

Chemistry
What is the functional group for aromatic hydrocarbons? Would it just be the benzene ring?
Wednesday, June 12, 2013 at 8:37am

chemistry
calculate the freezing point of an aqueous solution containing 10.50 g of MgBr2 in 200 g of water (MgBr2=184 g, Kf for water =1.80 K kg mol-1)
Wednesday, June 12, 2013 at 6:41am

Chemistry
Sea water contains an average of 1.08 x 10^3 ppm of Na+ ion. Calculate the molar concentration of Na+ given that the average density of sea water is 1.02 g/ml.
Wednesday, June 12, 2013 at 6:31am

chemistry
a solution is made by dissolving 117 g of nacl in 585 g of h2o. what is its molarity
Wednesday, June 12, 2013 at 2:21am

Chemistry
What is the functional group for aromatic hydrocarbons? Would it just be the benzene ring?
Tuesday, June 11, 2013 at 11:29pm

Chemistry
How to separate and isolate the components of barium sulfate?
Tuesday, June 11, 2013 at 10:12pm

chemistry
36.5g of hcl are dissolved in 180g of h2o. what is the mole fraction of the solute
Tuesday, June 11, 2013 at 8:20pm

Chemistry
For the cell diagram Pt(s)|H2(g)|H+(aq)||Cu2+(aq)|Cu(s) Write a balanced equation for the half-reaction at the cathode. The cathode is the site of reduction so copper gets reduced. So wouldn't the answer be: Cu2+(aq) -> Cu(s) + 2e-?
Tuesday, June 11, 2013 at 2:43pm

Chemistry
What is the Net Ionic for the two following equations? Calcium carboante B) Fe(SCN)^2+
Tuesday, June 11, 2013 at 12:03pm

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