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September 17, 2014

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

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chemistry
a.Given the equation: 2CaCO3 + 2SO2 + O2 -> 2CaSO4 + 2CO2 What is the actual yield of CO2 if 7.5 mol of O2 gives a percent yield of 80%? b. The pollutant sulfur dioxide can be removed from the emissions of an industrial plant by the reaction with calcium carbonate and ...
Sunday, July 27, 2014 at 4:47am

chemistry
A student used 3.27g of Zn to react with excess HCl and obtains 6.47g ZnCl2. What is the percent yield?
Sunday, July 27, 2014 at 4:37am

Chemistry
A 0.60 g sample consisting of only CaC2O4 & MgC2O4 is heated at 5000C, converting the two salts of CaCO3 and MgCO3 . The sample then weighs 0.465 g. If the sample had been heated to 9000C, where the products are CaO & MgO, what would the mixtures of oxides have weighed? a) 0....
Saturday, July 26, 2014 at 11:42pm

CHEMISTRY
how to predict that given complex is sp3 dsp2 hybridized because in Mcqs they ask to identify hybridization in given compound
Saturday, July 26, 2014 at 9:08pm

CHEMISTRY
how to predict that given complex is sp3 dsp2 hybridized
Saturday, July 26, 2014 at 7:37pm

chemistry
A silicon ribbon measuring 100 micron thick, 5 mm wide, and 1 m long has 5 volts applied across its long dimension. The resistivity of silicon is 640 ohm-m. How much current will flow through the ribbon? Express your answer in Amps
Saturday, July 26, 2014 at 7:07pm

chemistry
ph of 6.10mL of 1.20M HCl diluted to 0.560L .
Saturday, July 26, 2014 at 4:35pm

Chemistry
1 mole of equimolar mixture of ferric oxalate and ferrous oxalate will require xmole of KMnO4 in acidic medium for complete oxidation, x isis: a) 0.5 mole b) 0.9 mole c) 1.2 mole d) 4.5 mole
Saturday, July 26, 2014 at 2:49pm

Chemistry
A metal M forms the sulphate M2(SO4)3 . A 0.596 gram sample of the sulphate reacts with excess BaCl2 to give 1.220 g BaSO4. What is the atomic weight of M? (Atomic weights : S = 32, Ba = 137.3)
Saturday, July 26, 2014 at 2:48pm

Chemistry
Nitric acid can be produced from NH3 in three steps process: I)4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g) II)2NO(g) + O2(g) → 2NO2(g) III)3NO2(g) + H2O(l) →2HNO3(aq) + NO(g) % yield of Ist, IInd & IIIrd are respectively 50 % , 60 % & 80 % respectively the what ...
Saturday, July 26, 2014 at 2:44pm

chemistry
1. What is the binding energy per nucleon? Why is the binding energy per nucleon, rather than per nuclide, used to compare nuclide stability? 2. When a nucleus forms from nucleons, is energy absorbed or released? Why? 3. Many scientists reacted skeptically to Einstein's ...
Saturday, July 26, 2014 at 2:30pm

College English
John Winthrop “A Model of Christian Charity" Discuss the manner in which the theories expressed by Winthrop are in some degree evident in American government and culture today. CAN SOMEONE TELL ME IF I ANSWER IT RIGHT? In Prospero's America, Walter W. Woodward ...
Saturday, July 26, 2014 at 12:45pm

Chemistry Help
1. Spectroscopic studies of the reaction of azide ion with the cluster [Ru3(CO)12] in acetone solvent confirmed the occurrence of process (i) under a CO atmosphere. Kinetic measurements of this rapid [Ru3(CO)12]+ N3– →[Ru3(NCO)(CO)11]–+ N2(i) reaction revealed ...
Saturday, July 26, 2014 at 12:36pm

Chemistry
Suppose 26.0g of sodium bromide is dissolved in 150mL of a 0.60M aqueous solution of silver nitrate. Calculate the final molarity of bromide anion in the solution. You can assume the volume of the solution doesn't change when the sodium bromide is dissolved in it.
Saturday, July 26, 2014 at 7:10am

Chemistry
Calculate the number of millilitres of NH3(aq) solution (d = 0.986 g/ mL) contain 2.5 % by weight NH3 which will be required to precipitate iron as Fe(OH)3 in a 0.8 g sample that contains 50 % Fe2O3.
Saturday, July 26, 2014 at 7:05am

chemistry
*This is part of an exam. so please don't give full solution* just trying to bump ahead of a block. The decomposition of NO2 at room temperature exhibits the following variation in concentration with time: The concentration of NO2 is expressed in mol/liter, while time is ...
Saturday, July 26, 2014 at 12:00am

college English
Discuss the manner in which the theories expressed by John Winthrop are in some degree evident in American government and culture today. Can someone tell if my answer is right. In Prospero's America, Walter W. Woodward looks at the exchange of catalytic society to America ...
Friday, July 25, 2014 at 8:42pm

English
Discuss the manner in which the theories expressed by John Winthrop are in some degree evident in American government and culture today. Can someone tell if my answer is right. In Prospero's America, Walter W. Woodward looks at the exchange of catalytic society to America ...
Friday, July 25, 2014 at 7:31pm

Chemistry
Hydrogen Storage in Alloys - The Future? Certain alloys such as LaNi5 can store hydrogen at room temperature. A plate of LaNi5 containing no hydrogen is placed in a chamber filled with pure hydrogen and maintained at a constant pressure. At what depth from the surface will the...
Friday, July 25, 2014 at 6:10pm

Chemistry Please Help!!!
Airbags contain a mixture of sodium azide, potassium nitrate, and silicon dioxide. A sensor detects a head on collision that cause the sodium azide to be ignited and to decompose forming sodium and nitrogen gas. This gas fills a nylon or polyamide bag such that the front face ...
Friday, July 25, 2014 at 12:55pm

chemistry
What volumr 0.250 mol/L hydrochloric acid is neutralized by 1.50g of calcium hydroxide?
Friday, July 25, 2014 at 3:28am

Chemistry
2Mg + O2 --> 2MgO REMEMBER our mole ratio is 2Mg:1O2, 2Mg:2MgO, 1O2:2MgO So if we had 3Mg how much O2? (3Mg)(1O2/2Mg) = 1.5O2 How much MgO could be produced from 3O2?
Thursday, July 24, 2014 at 7:06pm

chemistry
How many milliliters of a 0.100 M NaOH solution are required to neutralize 25.0 milliliters of 0.150 M HCl? Select one: a. 25.0 ml b. 37.5 ml c. 125 ml d. 167 ml
Thursday, July 24, 2014 at 12:55pm

chemistry
what mass of the following compounds will dissolve in 200g of water at 30 degrees Celsius a) CuSO45H2O b) KNO3 c) NaNO3 how do a work it out, thanks
Thursday, July 24, 2014 at 8:21am

Chemistry
Which of the following is true regarding the structure of atoms? A. The amount of charge on a proton is greater than the amount of charge on an electron. B. Isotopes of an element differ in the number of protons in the nucleus. C. The mass of each electron is the same as the ...
Thursday, July 24, 2014 at 12:09am

Chemistry
A 11.0-mL sample of an unknown H3PO4 solution requires 116mL of 0.140 KOH to completely react with the H3PO4. What was the concentration of the unknown H3PO4 solution (answer in M). H3PO4(aq) + 3KOH(aq) --> 3H2O(l) + K3PO4(aq)
Wednesday, July 23, 2014 at 9:38pm

chemistry
If a reaction has rate constant of 1.33 s^-1 at 206 deg C and an activation energy of 58.6 kj mol^-1. whats the rate constant at 358 deg C ?
Wednesday, July 23, 2014 at 8:36pm

chemistry
Hello, Please help me with this question! Which dilution would turn 10% (by mass) HCl solution into 0.100 M HCl solution? Density of 10% HCL = 1.08 g ml^-1
Wednesday, July 23, 2014 at 6:14pm

Chemistry
Hello, I would greatly appreciate some help with the following problem, as I'm not sure how to proceed. I'm trying to find solubility (Ksp) of Cu(IO3)2 from titration experiment. The following equations were provided: Cu(IO3)2 --> Cu^2+ + 2IO3^- Ksp = [Cu^2+][IO3...
Wednesday, July 23, 2014 at 6:11pm

physical chemistry
when two liquid A and B mixed cooling occurs. why?
Wednesday, July 23, 2014 at 12:18am

Chemistry
Consider the unbalanced redox reaction: Cr2 O7 2-(aq) + Cu(s) ----> Cr3+(aq) + Cu2+ Balance the equation in acidic solution and determine how much of a 0.850 M K2 Cr2 O7 solution is required to completely dissolve 5.25 g of Cu.
Tuesday, July 22, 2014 at 11:27pm

Chemistry
Why would you subtract the heat capacity of the calorimeter when calculating the heat of the reaction?
Tuesday, July 22, 2014 at 8:19pm

Chemistry
For the equation q=cΔt, q=100KJ, initial temp=20 degrees celsius, final temp=31.4 degrees celsius and I need to find c. Do I need to convert the q value from KJ to J?
Tuesday, July 22, 2014 at 6:03pm

chemistry
What mass of cesium chloride must be added to 0.570 L water to produce a 0.375 m solution?
Tuesday, July 22, 2014 at 12:46pm

CHEMISTRY (PLEASE HELP)
My question is about Determination of Iodine Value in Fats & Oils experiment. I can't seem to get the right IV for coconut oil (Iv = 7-11 range). I followed the procedure used by American Oil Chemists Society, but still I'm getting an IV value of around 1. The volume ...
Tuesday, July 22, 2014 at 9:13am

chemistry
250 gms of Zn (65.5) gave 242 gms of ZnO on ignition. Calculate %age yield of the reaction.
Tuesday, July 22, 2014 at 5:37am

chemistry
Calculate the pH of a solution formed by the addition of 25.00 g of sodium acetate, NaC2H3O2 , to 450 mL of a 0.210 M solution of acetic acid, HC2H3O2
Monday, July 21, 2014 at 10:09pm

chemistry
Potassium Chloride 3:4 solution 30ml. How many milliliters of a potassium 1:20 solution and 4:5 solution do you need to prepare the order?
Monday, July 21, 2014 at 9:35pm

chemistry
In what proportion should you combine a 2:5 soaking solution and distilled water to create a 300 ml of a 1:20 solution?
Monday, July 21, 2014 at 8:38pm

chemistry
In what proportion should you combine a 2:5 soaking solution and distilled water to create a 300 ml of a 1:20 solution?
Monday, July 21, 2014 at 7:09pm

chemistry
In what proportion should you combine a 2:5 soaking solution and distilled water to create a 300 ml of a 1:20 solution
Monday, July 21, 2014 at 6:39pm

chemistry
When using a 1% cream and a 6% cream to produce a 4% cream, how many parts of each initial ingredient will be needed?
Monday, July 21, 2014 at 6:33pm

Chemistry
For an enthalpy lab, why would calculated value differ from the theoretical value (in percent error) for the heat reaction of Mg/HCl and MgO/HCl
Monday, July 21, 2014 at 4:42pm

Chemistry
Calculate the concentrations of all species in a 1.17 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10–2 and Ka2 = 6.3× 10–8. I found Na+ = 2.34 SO3^2- = 1.17 H2SO3 = 7.14 x10^-13 I can't find HSO3...
Monday, July 21, 2014 at 2:10pm

Chemistry
Find the enthalpy of combustion of magnesium using Hess' law given the following data (assume that exactly 100.0 mL of HCl was used in each trial and that HCl is in excess) Magnesium/HCl reaction: Grams of Mg= 0.244g Initial temp= 32.2 degrees celsius Final temp= 21.3 ...
Monday, July 21, 2014 at 2:06pm

chemistry
When you take a block of butter out of the fridge,it is hard.However,after 15 minutes at room temperature it is soft enough to spread
Monday, July 21, 2014 at 2:00pm

Chemistry
Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.200 M phosphoric acid solution. pKa1 = 2.16 pKa2 = 7.21 pKa3 = 12.32 Ok I haven't been able to ...
Monday, July 21, 2014 at 1:48pm

chemistry 185
how are you going to prepare the follwoing phosphate solution which is used in many cell culture medium? 12 liters ;PH 7.4; 0.9%WT (total salts weight is 9.00 grams in one liter) How many grams of what acid? how many grams of the conjugate base?
Monday, July 21, 2014 at 12:22pm

chemistry
Which one of the following is a characteristic of a metal? A. Reacts with bases to produce salts B. Changes the color of litmus paper to red C. Becomes negative when combined with other elements D. Conducts heat readily
Monday, July 21, 2014 at 10:15am

Chemistry
why can't the enthalpy of magnesium be measured using a coffee cup calorimeter?
Monday, July 21, 2014 at 1:25am

Chemistry
What is meant by 0.2mol (12g) of glacial acetic acid how can we make ?
Monday, July 21, 2014 at 12:42am

Honors Chemistry
If 72.4 kJ of heat is supplied to a 752 g block of metal, the temperature of the metal increases by 9.95°C. Calculate the specific heat capacity of the metal in J/g·°C. I cannot find the information in my textbook, and I don't understand the equation needed ...
Monday, July 21, 2014 at 12:26am

chemistry
It is ok to have a negative percent error? I got a negative value for the percent error of the enthalpy of the formation of methane gas
Sunday, July 20, 2014 at 10:25pm

Chemistry
The combustion reaction of Mg +1/2 O2-->MgO produces a very bright white flame and high heat. Verify that the following reactions produce the same overall reaction: a) MgO+2HCl-->MgCl2+H2O b) Mg+2HCl-->MgCl2+H2 c) H2+1/2O2-->H2O ΔH°= -285.8 KJ/mol
Sunday, July 20, 2014 at 10:19pm

chemistry
a. Determine the density of a cube of copper with a length of 5.00 cm and a mass of 1,112.50 g. b. Calculate the number of atoms in the cube
Sunday, July 20, 2014 at 6:20pm

Chemistry
I am to use this formula to find ΔH°f,methane: ΔH°comb=2ΔH°f,water+&#​916;H°f, carbon dioxide-ΔH°f,methane-2ΔH&d​eg;f,oxygen For ΔH°comb, the value is 884 KJ/mol For ΔH°f,water, the value is -285.8 For...
Sunday, July 20, 2014 at 5:13pm

Chemistry
A calorimeter is filled with 10.0 millimole (mmole) of methane gas and an excess of oxygen. When burned, the ignition wire releases 140.77 J of heat. The heat capacity of the calorimeter is 4.319 KJ°C-1. qwire= 140.77 J Calculate ΔHcomb. Recall that ideal gas law is ...
Sunday, July 20, 2014 at 2:01pm

chemistry clearly step by step
Al2(s04)3 solution of 1 molal concentration is present in 1 litre solution of 2.684g/cc.How many moles of bas04 would be precipitation on adding bacl2 in excess? The answer 6M I do not understand pls explain step by step Thank a lot all tutors
Sunday, July 20, 2014 at 12:29pm

chemistry step by step clearly
10L of hard water required 5.6g of lime for removing hardness. hence temporary hardness in ppm of cac03. The answer 1000ppm I really want all tutors to solve it form clearly step by step. Thank a lot
Sunday, July 20, 2014 at 12:01pm

Chemistry
If 1.5g of CaO is mixed with 2.5M HNO3 how many moles of CaO were reacted and what type of reaction is this ?
Sunday, July 20, 2014 at 10:04am

Chemistry
I have previously posted this question, but now I am lost question: A calorimeter is filled with 10.0 millimole (mmole) of methane gas and an excess of oxygen. When burned, the ignition wire releases 107.2 J of heat. The heat capacity of the calorimeter (including the bomb and...
Saturday, July 19, 2014 at 4:17pm

chemistry
Which of the following is the ph of a solution in which concentration of hydrogen ion is greater than hydroxide ion. 0ptions:12,9,7 or 3
Saturday, July 19, 2014 at 2:54pm

chemistry
4. Calculate the Gibbs’ free energy change for the reaction Mg(s) + H2O(g) → MgO(s) + H2(g) carried out at 100ºC given the data below. Under these conditions is this reaction product favoured? ΔHºformation (kJ mol^-1) MgO(g) -602 H2O(g) -242 H2(g) 0 ...
Saturday, July 19, 2014 at 2:43pm

chemistry
3. Calculate the standard entropy change for the reaction: N2 + 3H2 → 2NH3 given the standard entropies Sº(N2)(g) = 191.6 J K^-1 mol^-1 Sº(H2)(g) = 130.6 J K^-1 mol^-1 Sº(NH3)(g) = 193.3 J K^-1 mol^-1
Saturday, July 19, 2014 at 2:41pm

chemistry
2. Calculate the enthalpy change of combustion for ethene gas (C2H4) given the following enthalpy changes of formation: ΔHºf(C2H4)(g) = +52 kJ mol^-1 ΔHºf(CO2)(g) = -394 kJ mol^-1 ΔHºf(H2O)(g) = -286 kJ mol^-1
Saturday, July 19, 2014 at 2:40pm

chemistry
1. Calculate the standard enthalpy change for the reaction: C2H4(g) + H2(g) → C2H6(g) given that the enthalpy of combustion for the reactants and products are: ΔHºc(C2H4)(g) = -1411 kJ mol^-1 ΔHºc(C2H6)(g) = -1560 kJ mol^-1 ΔHºc(H2)(g) = -...
Saturday, July 19, 2014 at 2:40pm

Chemistry
The pH of an acid solution is 5.90. Calculate the Ka for the monoprotic acid. The initial acid concentration is 0.10 M. What I have done: pH = 5.9 a = 10^-5.9 = 1.2589 * 10^-6 Ka = [H+][A-]/[HA] Ka = (1.2589*10^-6)^2/(.01-1.2589) I got -1.26903013E-12, but it's not ...
Saturday, July 19, 2014 at 1:39pm

chemistry step by step for me. Thank a lot
342gm of 20% by mass of ba(oh)2 solution sq gr .57 is reacted with 1200ml of 2m hn03. if the find density is same as pure water then molarity of the ion in resulting solution by nature of the above solution is dentified. The answer 0.888M Who helps me to solve it step step ...
Saturday, July 19, 2014 at 11:24am

chemistry
What is the conjugate acid base in this equation: h2so4+h20---Hso4^-+h3o^+ 2:) which phase of matter can act as a solvent. A.gas B.solid C.liquid D.all the above
Friday, July 18, 2014 at 10:08pm

chemistry
For the number 2 question. It is asking. How mnay ML of solute will be dissolved in a 435 ML of 5.4%V/V of HCI solutions.
Friday, July 18, 2014 at 8:19pm

chemistry
So i if do 4 x250/100 i will get the answer for the prob?
Friday, July 18, 2014 at 7:40pm

chemistry
What mass of solute is dissolved in 250.ml of 4.00%m/v solution. I am confused what to do.in response to question 2 of my other question it asking for volume of the solute.
Friday, July 18, 2014 at 6:51pm

chemistry
What will be the molarity of 335 ml of solutions containing 1.02 g of magnesium perchlorate. Here what i think divide 335/1.02 to get answer but i am not sure. Question 2:) how many ml of solute will be dissolved in a 435ml of 5.4%v/v of hci solution. I am thinking divide ...
Friday, July 18, 2014 at 6:10pm

chemistry
I got kc to be 0 but that has got be wrong
Friday, July 18, 2014 at 4:46pm

chemistry
A mixture of 0.100 mol NO, 0.200 mol H2 and 0.0800 mol N2 were placed in a 2.00L reaction vessel, heated, and allowed to come to equilibrium conditions. At equilibrium, the molar concentration of N2 was 0.0500 mol/L. Calculate Kc for this reaction. 2NO + 2H2 <---> N2 + ...
Friday, July 18, 2014 at 4:37pm

chemistry
how to find a structure factor of a face centerd cubic lattice
Friday, July 18, 2014 at 12:33pm

chemistry
The weight of one atom of uranium is 238amu.its actual weight is
Friday, July 18, 2014 at 6:14am

Chemistry
What quantity of heat is required to convert 200g of ice at 0.00C into water at 50C? I know that im suppose to use the E=mc(Delta T) but im not sure how...
Thursday, July 17, 2014 at 6:41pm

Chemistry
What quantity of heat (kJ) is required to convert 200g of ice at 0.00C into water at 50C?
Thursday, July 17, 2014 at 6:29am

Chemistry
I got 0.907 KJ for ΔHcomb but I don't know if its correct. I also don't know how to write the equation. -------- question: A calorimeter is filled with 10.0 mole of methane gas and an excess of oxygen. When burned, the ignition wire releases 107.2 J of heat. The ...
Wednesday, July 16, 2014 at 11:39pm

chemistry
When 3.00 moles of sodium are reacted with large amounts of chlorine gas 145.8 g of sodium chloride are produced determine percentage yield
Wednesday, July 16, 2014 at 10:51pm

Chemistry
I got 0.907 KJ for ΔHcomb but I don't know if its correct. I also don't know how to write the equation. -------- question: A calorimeter is filled with 10.0 mole of methane gas and an excess of oxygen. When burned, the ignition wire releases 107.2 J of heat. The ...
Wednesday, July 16, 2014 at 9:02pm

Chemistry
An aqueous solution of NaCl is 270m. If the density of the solution is 1.20g/ml. Find a) % NaCl by mass b) Molarity of NaCl in the solution.
Wednesday, July 16, 2014 at 9:53am

CHEMISTRY
HF + H2O <==> H3O+ + F- By dissolving 0.03 mol HF in 1 L water , seen that [HF] at the equilibrium is 0.027 M , then : 1) If we divide 0.03 mol/ 1 L it would be 0.03 M , why that difference ? 2) How many moles HF in 1 L water is required to reach the equilibrium ?
Wednesday, July 16, 2014 at 7:57am

CHEMISTRY
I have trouble how to resist pH in buffer solutions ( in acidic buffer , and in basic buffer ) when we add an acid , and a base ! how the reactions in buffer follow Le chatlier's principle ?
Wednesday, July 16, 2014 at 7:33am

chemistry
275 ml of active ingredient is added to 725 ml of an alcohol based solution. What is the final strength (v/v)
Tuesday, July 15, 2014 at 7:23pm

Chemistry
Determine the pH of the following solutions: a) A 250.0 mL solution that contains 0.125 M benzoic acid and 0.147 M sodium benzoate. b) The solution in part (a) after 30.0 mL of 0.510 M hydrochloric acid has been added. a. Ka = 6.3 x 10^-5 pKa = 4.20 pH = pKa+log(base/acid) pH...
Tuesday, July 15, 2014 at 6:30pm

Chemistry
1. A solution is prepared such that it is 0.45 M in formic acid and 0.35 M in sodium formate. a) Where is this mixture located on a titration curve: before the buffer point, at the buffer point, or after the buffer point? b) Use the Henderson-Hasselbach to determine the pH of ...
Tuesday, July 15, 2014 at 4:59pm

Chemistry
Benzene reacts with hot concentrated nitric acid dissolved in sulfuric acid to give chiefly nitrobenzene, C6H5NO2. A by-product is often obtained, which consists of 42.86% C, 2.40% H, and 16.67% N (by mass). The boiling point of a solution of 5.5 g of the by-product in 45 g of...
Tuesday, July 15, 2014 at 11:45am

Chemistry
A saturated solution is made by dissolving 0.252 g of a polypeptide (a substance formed by joining together in a chainlike fashion some number of amino acids) in water to give 1.92 L of solution. The solution has an osmotic pressure of 3.69 torr at 25 °C. What is the ...
Tuesday, July 15, 2014 at 11:37am

Chemistry
Glauber's salt undergoes a phase transition according to the following equation: Na2SO4*10H2O(s)--> Na2SO4*10H2O(l) ∆H = 74.4 kJ/mol Calculate the mass (g) of Glauber's salt (use the masses to two decimal places found in the front of your text) needed to lower...
Tuesday, July 15, 2014 at 9:05am

Chemistry
A solution of acetic acid was prepared by mixing glacial acetic acid with water.The solution was 25% of acetic acid by volume.How much glacial axetic acid must be used to prepare 120 mL of desired volume?
Tuesday, July 15, 2014 at 8:54am

Chemistry
How much ethanol must be used to prepared 150 mL 10% by volume?
Tuesday, July 15, 2014 at 8:52am

chemistry
The concentration of vinegar was obtained by titration. 20 ml of vinegar required 43.2 ml of 0.350 M sodium hydroxide. Find the concentration of vinegar
Tuesday, July 15, 2014 at 7:21am

chemistry
A certain sample of gas has a volume of 500 ml. at a pressure of 1.5 atmosphere.What will be its volume if the gas is submerged toa pressure of 5 atmosphere at constant temperature?
Tuesday, July 15, 2014 at 2:39am

chemistry
How would polyethylene have the VSEPR shape of tetrahedral?
Monday, July 14, 2014 at 11:16pm

Chemistry
A 38.9 g piece of iron at 84.6oC is placed in a beaker containing 179.7 g of 20.7oC water. What is the final temperature (oC)of the water?
Monday, July 14, 2014 at 9:50pm

Chemistry
. An equal mass of which of the following states of matter could completely fill both a 100 mL or 500 ml container? A. Gas B. Liquid C. Mixture D. Solid
Monday, July 14, 2014 at 9:35pm

chemistry
How much 9% solution can you make by diluting 350ml of a 15% solution?
Monday, July 14, 2014 at 8:33pm

Chemistry
An unknown metal with a mass of 313 g has a heat capacity of 121 J/oC. What is the specific heat of the metal?
Monday, July 14, 2014 at 7:48pm

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