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November 26, 2014

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

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chemistry
3. What volume of 0.18M Na2CO3 would neutralize 25ml of the HCL solution?
Wednesday, October 24, 2012 at 3:08pm

chemistry
1. Compare the effects of adding the strong acid & base to the pH of water vs. the acetate and phosphate buffers.
Wednesday, October 24, 2012 at 2:15pm

algebra 1
Natalie performs a chemistry experiment where she records the tenperture of an ongoing reaction.The solution is 93.5 C after 3 minutes;90 C after 5 minutes,84.8 C after 9 minutes; 70.2 C after 18 minute; 54.4 C after 30 minutes;42.5 C after 37 minutes; and 24.9 C after 48 ...
Wednesday, October 24, 2012 at 11:28am

chemistry
A sample of orange juice has a pH of 3.44. Its [H3O+] is
Wednesday, October 24, 2012 at 10:34am

chemistry
MgO + HNO3 = ?
Wednesday, October 24, 2012 at 10:22am

chemistry
MgO + HNO3 =
Wednesday, October 24, 2012 at 10:22am

chemistry
What is the solution if you mix Sodium carbonate with sulfuric acid. Will it be clear or cloudy. Is the gas colorless?
Wednesday, October 24, 2012 at 2:48am

chemistry
1. what is the smell and odor of NaCl when you add AgNO3 and HNO3. 2. What is the smell and odor of NaBr when you add AgNO3 and HNO3. Does a precipitate form? 3. What is the smell and odor of NaI with AgNO3 and HNO3? Is there a precipitate?
Wednesday, October 24, 2012 at 2:36am

chemistry
Suppose that 0.450 of methane,CH4(g) , is reacted with 0.600 of fluorine, F2(g), forming CF(g) and HF(G) as sole products. Assuming that the reaction occurs at constant pressure, how much heat is released?
Wednesday, October 24, 2012 at 1:56am

chemistry
A scientist measures the standard enthalpy change for the following reaction to be -2923.0 kJ : 2C2H6(g) + 7 O2(g) 4CO2(g) + 6 H2O(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CO2(g) is _________
Wednesday, October 24, 2012 at 12:42am

CHEMISTRY: URGENT
24cm^3 of a mixture of methane and ethane were exploded with 90cm^3 of oxygen. After cooling to RTP the volume of gases was noted and it decreased by 32cm^3 when treated with KOH. Calculate the composition of the mixture.
Tuesday, October 23, 2012 at 11:53pm

college chemistry
A sample of helium occupies 1521 mL at 719 mmHg. Assume that the temperature is held constant and determine a) the volume of the helium at mmHg. b)the pressure, in mmHg, if the volume is changed to 315mL
Tuesday, October 23, 2012 at 11:10pm

Chemistry
why would a molecule change color under acidic or basic conditions?
Tuesday, October 23, 2012 at 11:05pm

Chemistry
Microwave ovens emit microwave energy with a wavelength of 12.5 cm. What is the energy of exactly one photon of this microwave radiation?
Tuesday, October 23, 2012 at 10:50pm

chemistry
Which of the following solutions will not form a precipitate when added to 0.10M NaOH? a)0.10 M MgBr2 b) 0.10 M NH4Br c) 0.10 M FeCL2
Tuesday, October 23, 2012 at 10:06pm

chemistry
Which of the following solutions will not form a precipitate when added to 0.10M NaOH? a) 0.10 M MgBr2 b) 0.10 M NH4Br c) 0.10 M FeCL2
Tuesday, October 23, 2012 at 10:03pm

Chemistry
I did a simple distillation and a fractional distillation to purify acetone. How do I determine the concentration of acetone? (Instructions say this is not a simple M=mol/L calculation). My guess was to divide the volume of purified acetone by the volume of unpurified acetone...
Tuesday, October 23, 2012 at 9:37pm

Chemistry
Which of the following substances are likely to be soluble in water? A)ZnS b)Au2(CO3)3 C )PbCL2 d) MnO2
Tuesday, October 23, 2012 at 9:36pm

CHEMISTRY
Are you always solving for final volume in the combined gas law?
Tuesday, October 23, 2012 at 8:44pm

Chemistry
Calcium carbonate can be used as an antacid to treat excess stomach acidity. What type of substance is calcium carbonate? a. base b. reducing agent c. acid d. buffer
Tuesday, October 23, 2012 at 7:07pm

Organic Chemistry
what is the major product of a reaction with 1-butene and Br2 in water?
Tuesday, October 23, 2012 at 7:02pm

Chemistry
Which of the following best describes the difference between a mixture and a pure substance? A. A mixture is made up of more than one type of atom; a pure substance is made up of only one type of atom. B. A mixture has the same properties throughout; a pure substance has the ...
Tuesday, October 23, 2012 at 6:48pm

Chemistry
Can someone please explain this problem to me step by step pleaseeeeeee? In the following acid—base neutralization reaction HNO3 (aq)+ KOH (aq)---KNO3(aq) + H2O(I) What is the molarity (M) of an HNO3 solution if 50.0ml is needed to react with 25.0ml of 0.150M KOH solution?
Tuesday, October 23, 2012 at 6:37pm

chemistry
how are the ionization energies evidence for the structure of the atom especially the electron configurations for atoms ?
Tuesday, October 23, 2012 at 6:27pm

Chemistry
Can someone please explain this problem step by step. How would you prepare 1000.0ml of 0.600M NaOH solution starting from concentration of 1.000M
Tuesday, October 23, 2012 at 6:22pm

Chemistry
If you spilled a container of iron filings on the ground, how would you separate the iron fillings from the soil using their individual physical properties?
Tuesday, October 23, 2012 at 6:20pm

college chemistry
How many gram of Zn would be necessary to produce 534 grams of Fe by the sequence of reactions shown below? Step 1 Zn + HCl ==> ZnCl2 + H2 Step 2 Fe2O3 + H2 ==> Fe + H2O
Tuesday, October 23, 2012 at 6:19pm

chemistry
A 3.75-G SAMPLE OF IRON ORE IS TRANSFORMED TO A SOLUTION OF IRON(II)SULFATE, FeSO4,AND THIS SOLUTION IS TITRATED WITH 0.150 M K2Cr2O7. IF IT REQUIRES 43.7 mL OF POTASSIUM DICHROMATE SOLUTION TO TITRATE THE IRON(II)SULFATE SOLUTION, WHAT IS THE PERCENTAGE OF IRON IN THE ORE? ...
Tuesday, October 23, 2012 at 5:54pm

CHEMISTRY
At what temp do hydrogen molecules, H2, have the same rms speed as nitrogen molecules, N2, at 455 C? At what temperature do hydrogen molecules have the same average kinetic energy?
Tuesday, October 23, 2012 at 5:48pm

chemistry
how many milliliters of 0.250 M KMnO4 are needed to react with 3.55 grams of iron(II)sulfate, FeSO4? the reaction is as follows: 10FeSO4(aq)+2KMnO4(aq)+8H2SO4(aq)&​uml; 5Fe2(SO4)3(aq)+2MnSO4(aq)+K2SO4(aq)+8H2O​(l)
Tuesday, October 23, 2012 at 5:42pm

CHEMISTRY
24cm^3 of a mixture of methane and ethane were exploded with 90cm^3 of oxygen. After cooling to RTP the volume of gases was noted and it decreased by 32cm^3 when treated with KOH. Calculate the composition of the mixture.
Tuesday, October 23, 2012 at 5:41pm

CHEMISTRY
A FALSK CONTAINS 49.8 mL OF 0.150 CALCIUM HYDROXIDE. HOW MANY MILLILITERS OF 0.500 SODIUM CARBONATE ARE REQUIRED TO REACT COMPLETELY WITH THE CALCIUM HYDROXIDE IN THE FOLLOWING REACTION? Na2CO3(aq)+ Ca(OH)2(aq)¨CaCO3(s)+2NaOH(aq)​
Tuesday, October 23, 2012 at 5:34pm

chemistry
If 0.500 mol NaN3 react, what mass in grams of nitrogen would result?
Tuesday, October 23, 2012 at 5:30pm

chemistry
WHAT IS THE VOLUME IN MILLILITERS OF 0.100 SULFURIC ACID CONTAINING 0.949 GRAMS H2SO4
Tuesday, October 23, 2012 at 5:01pm

chemistry
What mass of sodium bicarbonate reacts with 225 mL of 6.00 M HCl?
Tuesday, October 23, 2012 at 4:22pm

Chemistry
At what temp do hydrogen molecules, H2, have the same rms speed as nitrogen molecules, N2, at 455 C? At what temperature do hydrogen molecules have the same average kinetic energy?
Tuesday, October 23, 2012 at 4:16pm

chemistry...
knowing that one mole of KHP, C8H5O4K, reacts with one mole of NaOH, what mass of KHP is required to neutralized 30.0mL of the 0.10 M NaOH solution?
Tuesday, October 23, 2012 at 3:44pm

chemistry
For a particular isomer of C8H18, the following reaction produces 5108.7 kJ of heat per mole of C8H18(g) consumed, under standard conditions.
Tuesday, October 23, 2012 at 3:27pm

chemistry
Complete and balance the molecular equation, including phases, for the reaction of aqueous ammonium bromide, NH4Br, and aqueous lead(II) acetate, Pb(C2H3O2). Enter the balanced net ionic equation, including phases, for this reaction.
Tuesday, October 23, 2012 at 3:18pm

chemistry
.0900g of unknown acid(diproctic acid) with empirical formular(CHO2) is dissolved in 30.0ml of water and the rest is titrated to the endpoint with 50.0ml of .040 M NaOH(aq) determine the molecular formula of the acid?
Tuesday, October 23, 2012 at 2:42pm

Chemistry
a compound decomposes with half life of 8seconds and is independent of concentration.how much time is consumed to convert the concentration of one sixteenth of its initial concentration?
Tuesday, October 23, 2012 at 1:31pm

Chemistry
If you used 2300 kcal you expend in energy in one day to heat 6.0 * 10^4g of water, what would its new temperature be
Tuesday, October 23, 2012 at 12:58pm

Science - Chemistry!!!
A lead bullet with a mass of 8.50 g traveling at 4.80 x 102 m/s strikes a 2.00 kg block of wood and is embedded in it. Both the bullet and the block are initially at 25.0°C. Assume that no heat is lost to the surroundings and that all the kinetic energy of the bullet is ...
Tuesday, October 23, 2012 at 11:07am

chemistry
List the balanced net ionic equations for all reactions that you observed in this experiment. Use your observations to provide evidence for all successful reactions completed and products formed. Where applicable, list ions in their coordination complex form; for example, when...
Tuesday, October 23, 2012 at 10:45am

Chemistry
The Cu2+ ions in this experiment are produced by the reaction of 1.0g of copper. Information already found out .016 mol Cu2+ produced Overall reaction is Cu2+(aq)+Cl-(aq)+Cu(s)=2 CuCl(s) Maximum mass of CuCl that can be prepared from the reaction sequence of this experiment ...
Tuesday, October 23, 2012 at 10:43am

Chemistry
A sample of the compound prepared in this experiment, weighing .1021g, is dissolved in HNO3 and diluted to a volume of 100mL. A 10mL aliquot of that solution is mixed with 10mL 6 M NH3. The [Cu(NH3)4 2+] in the resulting solution is 5.16x10^-3 M. How many moles of Cu were in ...
Tuesday, October 23, 2012 at 10:26am

Chemistry
Assuming that the gases are ideal, calculate the amount of work done (in joules) in the following reaction. Is work done on or by the system? A reaction in the Mond process for purfying nickel(0) tetracarbonyl at 50-100 degrees Celsius. Assume one mole of nickel is used and a ...
Tuesday, October 23, 2012 at 10:20am

Chemistry
For the following reaction, 3.93 grams of carbon tetrachloride are mixed with excess methane (CH4). The reaction yields 4.10 grams of dichloromethane (CH2Cl2). methane (CH4) (g) + carbon tetrachloride (g) dichloromethane (CH2Cl2) (g) What is the theoretical yield of ...
Tuesday, October 23, 2012 at 9:58am

chemistry
If I have liquid that contains 10% metanol, that freezes on -20C. How many etanol i must add? I used f-la delT=Kf*b b=10,75 m=? where i use proc. of metanol and etanol. What graphic or f-la i use for this? Thank you
Tuesday, October 23, 2012 at 3:32am

organic chemistry
how do the flow rate of the carrier gas and the column temperature affect the retention time of a cocmpound on a GC column
Tuesday, October 23, 2012 at 2:24am

CHEMISTRY
Calculate the change in entropy that occurs when 17.68 g of ice at -12.7°C is placed in 54.05 g of water at 100.0°C in a perfectly insulated vessel. Assume that the molar heat capacities for H2O(s) and H2O(l) are 37.5 J K-1 mol-1 and 75.3 J K-1 mol-1, respectively, and...
Tuesday, October 23, 2012 at 2:21am

Chemistry I
In determining the heat capacity of a calorimeter, 50ml of water at 56*C is added to 50ml of water at 23*C. After about five minutes of mixing, the final temperature of the solution inside the calorimeter reached 37*C. Calculate the heat capacity of the calorimeter (J/*C-...
Monday, October 22, 2012 at 11:32pm

Chemistry 103
2NiO(s)→2Ni(s)+O2(g) If O2 is collected over water at 40.0C and a total pressure of 739mmHg , what volume of gas will be collected for the complete reaction of 24.18g of NiO?
Monday, October 22, 2012 at 11:06pm

Chemistry
1.05 g of an unknown gas at 47 °C and 1.05 atm is stored in a 2.25-L flask. Density of the gas= 0.47g/L What is the molar mass of the gas?
Monday, October 22, 2012 at 10:49pm

Chemistry
Consider the following reaction. 2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) ΔH = -118 kJ Calculate the heat when 103.6 mL of 0.500 M HCl is mixed with 300.0 mL of 0.550 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0°C and that the ...
Monday, October 22, 2012 at 10:33pm

CHEMISTRY
Mass (before reaction): test tube + HCl(aq) + stir bar + capsule 26.600 g Mass (after reaction): test tube + HCl(aq) + stir bar + capsule 25.300 g Volume of water displaced from the squirt bottle 148 mL Temperature of the CO2(g) 287.4 K Pressure (atm) 1.032 atm Using this data...
Monday, October 22, 2012 at 10:26pm

Chemistry
Calculate the number of carbon atoms in 0.75 L of acetone (CH3COCH3). (density=1.3g/mL and boiling point=48.5 degrees)
Monday, October 22, 2012 at 10:19pm

Chemistry
A student starts with 25 grams of sodium chloride as the limiting reactant and obtained 17.9 grams of dry pure sodium carbonate. What is the theoretical yield of sodium carbonate? What is the percent yield obtained by the student?
Monday, October 22, 2012 at 10:08pm

chemistry
What is the final temperature of water when 2.70 grams of calcium chloride is dissolved in 25 mls of water at 25.5 Celcius.
Monday, October 22, 2012 at 10:01pm

organic chemistry
a careless organic chemistry student was performing "competing nucleophiles in nucleophilic substitution reactions" experiment , and left his container of tert-butyl chloride and tert-butyl bromide open to the air for several hours. what happened to the composition ...
Monday, October 22, 2012 at 10:00pm

Chemistry
A student starts with 25 grams of sodium chloride as the limiting reactant and obtained 17.9 grams of dry pure sodium carbonate. What is the theoretical yield of sodium carbonate? What is the percent yield obtained by the student?
Monday, October 22, 2012 at 9:59pm

chemistry
onic compounds have names that... (choose all that apply) might contain Roman numerals. might start with ammonium. start with the name of an anion. have prefixes, like di or penta. start with the name of a nonmetal.
Monday, October 22, 2012 at 9:28pm

chemistry
What is the chemical formula of the compound that forms between lithium (Li) and phosphorus (P)?
Monday, October 22, 2012 at 8:58pm

Chemistry
25.0mL of an acidic 0.100 mol/L tin (II) chloride solution required an average volume of 12.7 mL of potassium dichromate solution for a complete reaction. The amount of concentration of the potassium dichromate solution is _______ mmol/L How do you go about solving this? I ...
Monday, October 22, 2012 at 8:52pm

Chemistry
25.0mL of an acidic 0.100 mol/L tin (II) chloride solution required an average volume of 12.7 mL of potassium dichromate solution for a complete reaction. The amount of concentration of the potassium dichromate solution is _______ mmol/L How do you go about solving this? I ...
Monday, October 22, 2012 at 8:52pm

Chemistry
25.0mL of an acidic 0.100 mol/L tin (II) chloride solution required an average volume of 12.7 mL of potassium dichromate solution for a complete reaction. The amount of concentration of the potassium dichromate solution is _______ mmol/L How do you go about solving this? I ...
Monday, October 22, 2012 at 8:50pm

chemistry
Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 70. cm3. If the combustion of this mixture releases 885 J of energy, to what volume will the gases expand against a constant pressure of 645 torr if all the energy of combustion is...
Monday, October 22, 2012 at 8:29pm

CHEMISTRY
Not for homework, just practice problems I'm having trouble with. Knowing that one mole of KHP, C8H5O4K, reacts with one mole of NaOH, what mass of KHP is required to neutralize 30.0 mL of the 0.10 M NaOH solution? if 24.5 mL of the 0.10 M NaOH solution is required to ...
Monday, October 22, 2012 at 8:20pm

Chemistry
What is the ionic equation for hydrolysis reaction of NH4C2H2O2 ? Thanks.
Monday, October 22, 2012 at 8:08pm

chemistry
how many moles of NaBr are produced from reacting 20.05 moles of AuBr3 with excess NaCN? AuBr3 +NaCN -> Au(CN)3 + NaBr
Monday, October 22, 2012 at 7:40pm

CHEMISTRY
Explain Why The Addition Of An Electron To A Chlorine Atom Is An Exothermic Process And The Addition Of An Electron To A Magnesium Atom Is An Endothermic Processs
Monday, October 22, 2012 at 7:14pm

chemistry
how many moles of NaBr are produced from reacting 20.05 moles of AuBr3 with excess NaCN? AuBr3 +NaCN -> Au(CN)3 + NaBr
Monday, October 22, 2012 at 7:13pm

chemistry
each element Na, Mg, Al, Si, P, S has a very big jump in ionization energies. Please explain what causes these jumps in energy?
Monday, October 22, 2012 at 6:51pm

Chemistry
I titrated 0.25 grams of soda ash with 43.7 mL of HCl (0.115M) and 25 mL of H2O. I am getting over 100% sodium carbonate in my answer here are my steps that I took to get the answer can somebody help me see what I did wrong? mols HCl=(0.115M)x (0.0437L)=0.005 mol HCl 1/2 x (0....
Monday, October 22, 2012 at 6:40pm

Chemistry
how many grams of hydrogen occupy 40 ml at 300.15 K and 710 torr?
Monday, October 22, 2012 at 6:34pm

Chemistry Lab
Does the pressure exerted by a gas depend on its molar mass?
Monday, October 22, 2012 at 5:31pm

Chemistry 20 titration
1) oi50 . tinypic . com / ejh6vm . jpg The most suitable indicator for the titration is: A)methyl violet B)chlorophenol red C)methyl orange D)phenolphthalein 2-A base is titrated with an acid solution until the indicator changes colour. This change in the colour of the ...
Monday, October 22, 2012 at 5:17pm

Chemistry
Why is a Gas Chromatography separation more efficient than a fractional distillation? What characteristics must the liquid stationary phase have? describe a method for identifying a compound using GC analysis. If you could answer anyone of these that would be great
Monday, October 22, 2012 at 4:31pm

Chemistry
In the theoretical reaction 2 B(aq) + 3 D(aq) ---> E(aq) + 4 F(aq) the concentration of D(aq) is 0.40 mol/L. If 25.0 mL of aqueous B is needed to react completely with 30.0 mL of aqueous D, the concentration of B(aq) is A-0.48 mol/L B) B-0.32 mol/L C) C-0.40 mol/L D) D-0.72...
Monday, October 22, 2012 at 3:43pm

Chemistry
What is the molar concentration of nitrate ions in a 0.161M magnesium nitrate(aq) solution?
Monday, October 22, 2012 at 3:36pm

chemistry 20 MC questions
1- The equipment needed to carry out a titration is: A) hot plate, pipet, and filter paper B) heat source, test tube, and filter paper C) heat source, pipet, and burette D) erlenmeyer flask, pipet, and burette 2- A student correctly predicted that 10.0 g of a precipitate would...
Monday, October 22, 2012 at 3:20pm

Chemistry
What volume of a 0.332 M hydrobromic acid solution is required to neutralize 29.6 mL of a 0.155 M calcium hydroxide solution ?
Monday, October 22, 2012 at 2:32pm

chemistry
How many grams of solid potassium hydroxide are needed to exactly neutralize 10.8 mL of a 1.25 M hydrobromic acid solution
Monday, October 22, 2012 at 2:29pm

Chemistry
The rate constant for a certain reaction is k=8.90×10^−3 s^-1. If the initial reactant concentration was 0.400M, what will the concentration be after 13.0 minutes?
Monday, October 22, 2012 at 1:36pm

chemistry
Is this equation correctly balanced? If not why. Al2S3+H2O----> Al2S3+3H2O---->Al2(SO)3+3H2
Monday, October 22, 2012 at 12:31pm

Chemistry
lime, Ca(OH)2 can be used to neutralize an acid spill.A 5.06-g sample of Ca(OH)reacts with excess of hydrochloric acid:6.74 g of calcium chloride is collected what is the percent yield of this experiment Ca(OH)2 + 2HCI ====> CaCl2 + 2H2O
Monday, October 22, 2012 at 10:58am

College chemistry
When your body metabolizes amino acids, one of the final end products is urea, a water so liable compound that is removed from the body as urine. Why is urea soluble in water, when hexamide, a related compound is not?
Monday, October 22, 2012 at 2:01am

College chemistry
When your body metabolizes amino acids, one of the final end products is urea, a water so liable compound that is removed from the body as urine. Why is urea soluble in water, when hexamide, a related compound is not?
Monday, October 22, 2012 at 2:01am

chemistry
Will a fluoride concentration of 1.0 mg/L be soluble in a water containing 200 mg/L of calcium? I got Qsp 1.38 * 10^-8 and Ksp = 3.45*10^-11 does that seem right? and does this mean fluride concentration will be soluble in water containing calcium?
Monday, October 22, 2012 at 12:29am

Chemistry 9
a) A 2.56 balloon contains 3.66 g of gas. Find the density b) A 45.3 g sample placed in a graduated cylinder causes the water level to rise from 25.0 mL to 41.8 mL . Find the density
Monday, October 22, 2012 at 12:13am

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, ...
Sunday, October 21, 2012 at 11:13pm

A.P. Chemistry
10. What mass of LiSO4 (110 g/mol) is required to prepare 30mL of 0.20M LiSO4? 11. Liquid bromine is reacted with aluminum to produce solid aluminum bromide. If 0.450L of bromine reacts with excess aluminum, how much aluminum is made? (Density of liquid bromine is 3.1g/L)
Sunday, October 21, 2012 at 11:10pm

Chemistry
If there were 197g of sulfuric acid in your car battery, how many grams of baking soda would you need to completely neutralize the acid. Here is the balanced equation: H2SO4(aq) + NaHCO3(s)....NaSO4(aq) + 2CO2(g) + 2H20(l)
Sunday, October 21, 2012 at 11:03pm

chemistry
how to calculate activation energy and frequency factor
Sunday, October 21, 2012 at 11:02pm

Chemistry
What mass of LiSO4 (110 g/mol) is required to prepare 30mL of 0.20M LiSO4?
Sunday, October 21, 2012 at 10:58pm

Chemistry
A reaction of magnesium with nickel (iii) chloride will produce magnesium chloride and nickel. Using 31.76g of magnesium would produce how many grams of nickel?
Sunday, October 21, 2012 at 10:55pm

chemistry
If the heat of combustion for a specific compound is -1310.0 kJ/mol and its molar mass is 75.45 g/mol, how many grams of this compound must you burn to release 708.60 kJ of heat?
Sunday, October 21, 2012 at 10:29pm

chemistry
I'm so irritated i cannot come up with the right answer. When 1662 J of heat energy is added to 45.9 g of hexane, C6H14, the temperature increases by 16.0 °C. Calculate the molar heat capacity of C6H14.
Sunday, October 21, 2012 at 10:10pm

chemistry
Will a fluoride concentration of 1.0 mg/L be soluble in a water containing 200 mg/L of calcium? This is what i found for ksp CaF2<--> Ca(2+) +2F(-) Ksp=(x)(4x^2) where x=solubility Therefore, Ksp=3.7 x 10^-11 and for Qsp I am not sure how to go on about calculating that.
Sunday, October 21, 2012 at 10:07pm

Chemistry problem
The volume of an ideal gas contracts from 5.68 L to 2.35 L as the result of a constant applied pressure of 1.48 atm. The system releases 733 J of heat during this process. Calculate deltaU (internal energy) for this process. Express answer in Joules. Please help, thank you ...
Sunday, October 21, 2012 at 9:59pm

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