Tuesday
February 9, 2016

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

Chemistry- Dr. Bob
Use Coulomb's law to calculate the ionization energy in kJ/mol of an atom composed of a proton and an electron separated by 176.00 pm .
Wednesday, November 11, 2015 by Rucha

top ville college
Chemistry What volume of carbon (iv) oxide at s.t.p is evolved when o.5moles of NaHCO3 is heated
Wednesday, November 11, 2015 by olamide

chemistry
1. Calcuate the distance(km) from the Earth to the Moon if it takes light 1.3 seconds to make the trip? 2. Saturn is about 1.2 billionkm from Earth. How long does it take light to travel that distance? (I was only given the wave equation, Max Plancks equation, De Broglies ...
Wednesday, November 11, 2015 by Brooke N

chemistry
Balance the following redox equation. hno2(aq) + h2so4(aq) + k2cr2o7(aq)= hno3(aq) + cr2(so4)3 + h20 + k2s04?
Wednesday, November 11, 2015 by muzo

chemistry
balance the following redox equation. hno2(aq) + h2so4(aq) + k2cr2o7(aq)= hno3(aq) + cr2(so4)3 + h20 + k2s04
Wednesday, November 11, 2015 by muzo

Chemistry- Dr. Bob
Why doesn't Rb react with N2?
Wednesday, November 11, 2015 by Anonymous

Organic Chemistry
A sample of carvone was found to be 39% optically pure in favor of the dextrorotatory enantiomer. The specific rotation for enantiomerically pure carvone is 61o. The polarimetry experiment that led to this result was performed utilizing a 2.5 dm polarimeter tube and a solution...
Wednesday, November 11, 2015 by polly

chemistry
how do you go about to find the grams that will react with 90g acetic acid
Wednesday, November 11, 2015 by neliswa

Chemistry
What volume of 18N H2SO4 is required to prepare 125 ml of 6.0 N H2SO4?
Wednesday, November 11, 2015 by Momo

chemistry
A viral preparation was inactivated in a chemical bath. The activation process was found to be first order in virus concentration. The beginning of the experiment 2% of the virus was found to be inactivated per minute. [i] Evaluate k for the inactivation process in units (1/s...
Wednesday, November 11, 2015 by Steven

Chemistry
To determine the calories of a food, the energy released is calculated based on the mass used in the calorimeter. If a 0.8 g nut is consumed in a bomb calorimeter and the resultant temperature change is 80.3 degrees C for 50 mL of water, what would be the energy in Calories ...
Tuesday, November 10, 2015 by Anonymous

Chemistry
Two electrolysis cells are set up in series so that the same current flows through each. In one compartment 5.40 g of Ag (molar mass = 108 g/mol) is deposited from a Ag+ solution. What mass of Cu (molar mass = 64 g/mol) is deposited simultaneously if the other cell contains ...
Tuesday, November 10, 2015 by Anonymous

Chemistry
Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. Given the following data, Ethylbenzene, C6H5--CH2CH3 : delta Ht = -12.5 kJ/mol, delta Gt = 119.7 kJ/mol and S = 255 J/mol*K Styrene, C6H5--CH==CH2 : ...
Tuesday, November 10, 2015 by Judith

Chemistry
How do I find the number of moles of NaOH when given 2M and 50.0mL? Also with HCl?
Tuesday, November 10, 2015 by Anonymous

CHEMISTRY!!!!!!!!!!
Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. Given the following data, Ethylbenzene, C6H5--CH2CH3 : delta Ht = -12.5 kJ/mol, delta Gt = 119.7 kJ/mol and S = 255 J/mol*K Styrene, C6H5--CH==CH2 : ...
Tuesday, November 10, 2015 by Judith

chemistry
find the percentage by mass of nitrogen present in (NH4)2SO4
Tuesday, November 10, 2015 by lucky

Chemistry
The molar mass of the reagent, Fe(NH4)2(SO4)2.6H2O is 392.14 g/mol. Now suppose the measured mass of Fe(NH4)2(SO4)2.6H2O during the practical was 0.0218 g and this was dissolved in 50ml of deionized water that contains 1 to 2ml of concentrated sulphuric acid and transfer ...
Tuesday, November 10, 2015 by Mara

Chemistry
Question Given the equation: 4 Fe(s) + 3 O2(g) ? 2 Fe2O3(s), what is the theoretical yield of Fe2O3 from the reaction of 4.86 g Fe with excess O2? b. If 6.76 g Fe2O3 are actually obtained from 4.86 g Fe, what is the percent yield? c. Under other conditions, the percent yield ...
Tuesday, November 10, 2015 by Kami

chemistry
Calculate the molar enthalpy change for this reaction: HCl(aq 1.00M) + NaOH -> NaCl(aq,.500M)+ H2O Initial temp: 22.15 degrees Celsius Extrapolated temp: 25.87 degrees Celsius DT: 3.72 degrees Celsius Notes: Calculate the enthalpy change for this reaction. The density of ....
Tuesday, November 10, 2015 by Failure

Chemistry
You calibrate 25ml pipette at 25degae centigrade using steel weight.the weight of the delivered volume of water is 24.971.what is the volume of pipette at 20 and 25 degree centigrade?
Tuesday, November 10, 2015 by Syed

Chemistry
Write the shorthand version of the electron configuration of an element that has eight electrons. I came up with the configuration as 1s^2-2s^2-2p^4, but how do I write the shorthand version of an element that has not been specified?
Tuesday, November 10, 2015 by Anonymous

chemistry
Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. (a) Find ÄH°rxn, ÄG °rxn, and ÄS °rxn, given these data at 298 K: (b) At what temperature is the reaction spontaneous? What ...
Monday, November 9, 2015 by Dalton

Chemistry
Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to include states for the ...
Monday, November 9, 2015 by KYson

Chemistry
how much heat is required to warm 225 grams of water from -50c to 200 c
Monday, November 9, 2015 by Bob

Chemistry
What volume (in mL) of a 0.300 M HNO3 solution will completely react with 43.9 mL of a 0.146 M Na2CO3 solution according to this balanced chemical equation? Na2CO3(aq)+2 HNO3(aq)->2 NaNO3(aq)+CO2(g)+H20(l)
Monday, November 9, 2015 by Connor Smith

Chemistry
What volume (in mL) of a 0.300 M HNO3 solution will completely react with 43.9 mL of a 0.146 M Na2CO3 solution according to this balanced chemical equation? Na2CO3(aq)+2 HNO3(aq)->2 NaNO3(aq)+CO2(g)+H20(l)
Monday, November 9, 2015 by Connor Smith

Chemistry
What volume (in mL) of a 0.300 M HNO3 solution will completely react with 43.9 mL of a 0.146 M Na2CO3 solution according to this balanced chemical equation? Na2CO3(aq)+2 HNO3(aq)->2 NaNO3(aq)+CO2(g)+H20(l)
Monday, November 9, 2015 by Connor Smith

Chemistry
A sample of nitrogen is collected over water at 21 degrees Celsius at a pressure of 745 torr. What is the partial pressure, in torr, of the nitrogen?
Monday, November 9, 2015 by Failure

chemistry
Suppose 3.50g each of sulfamic acid and sodium nitrite were allowed to react together. What would be the theoretical yield, in moles, of N2. Equation: NaNO2 + NH3SO3 -> N2 + H2O + NaHSO4 Notes: The theoretical yield of N2 can be calculated from the amounts of starting ...
Monday, November 9, 2015 by Failure

CHEMISTRY - BATTERIES
What is the voltage and the Gibbs Free Energy for the following reaction? (Assume standard conditions) 3Sn^2+ (aq) + 2Al (s) --> 2 Al^3+ (aq) + 3 Sn (s) Now calculate the Gibbs Free Energy for the above reaction if Sn^2+ (aq) is 0.15 and Al^3+ (aq) is 1.8
Monday, November 9, 2015 by DAN

Chemistry
If 1.65 M sulfuric acid is being used, how many mL of sulfuric acid will it take to fully react with 1.50 g of aluminum hydroxide?
Monday, November 9, 2015 by Anonymous

chemistry
A 10L flask at 298K contains a gaseous mixture of CO AND CO2 at a total pressure of 4atm.if 0.20 mole OF CO is present ;find the partial pressure of CO and that of CO2
Monday, November 9, 2015 by Nanayaw

chemsitry dr Bob
Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to include states for the ...
Monday, November 9, 2015 by KYson

chemsitry dr Bob
Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to include states for the ...
Monday, November 9, 2015 by KYson

chemistry
Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. (a) Find ÄH°rxn, ÄG °rxn, and ÄS °rxn, given these data at 298 K: (b) At what temperature is the reaction spontaneous? What ...
Monday, November 9, 2015 by Dalton

chemistry
the process of respiration, glucose is oxidized completely. In fermentation, O2 is absent, and glucose is broken down into Co2 and H2o. Calculate delta g for respiration of 1.00 g of glucose Calculate delta g for fermentation of 1.00 g of glucose. My answers: -16.0 kJ and -1....
Monday, November 9, 2015 by Juidith

CHEMISTRY
200.0 ml of 0.5000 M acetic acid is added to 200.0 ml of 0.5000 M NaOH. What is the final pH? The Ka of acetic acid at 25 oC is 1.76 x 10-5. n(NH3COOH)=CxV=0.5x200/1000=0.1mol n(Naoh)=CxV=0.5x200/1000=0.1mol I have no idear of what to do after finding the number of moles
Monday, November 9, 2015 by BAFANA

AP Chemistry
Hey guys! I have answers, but am confused. Please and thanks for any help! A) Which of the following is false? 1.A spontaneous change occurs by itself without assistance. 2.The greater the statistical probability of a state, the greater is its entropy. 3.A non-spontaneous ...
Monday, November 9, 2015 by Allie

Chemistry
How to I find the spectator ions of BaCl2+K2SO4->2KCl+BaSO4
Monday, November 9, 2015 by Sara

Chemistry
the process of respiration, glucose is oxidized completely. In fermentation, O2 is absent, and glucose is broken down into Co2 and H2o. Calculate delta g for respiration of 1.00 g of glucose Calculate delta g for fermentation of 1.00 g of glucose. My answers: -16.0 kJ and -1....
Monday, November 9, 2015 by Judith

Chemistry
1) A saturated solution of the slightly soluble salt MA3 is 1.4 ×10^–3 M in MA3. What is its Ksp value? 2) A 20.0 mL sample of NaIO3 was treated with an excess of KI and HCl and the iodine produced titrated with 0.05125 M Na2S2O3. 19.35 mL of Na2S2O3 solution were ...
Monday, November 9, 2015 by Brad

Organic Chemistry 2
What is the impurity that must be removed from the benzaldehyde reagent before it can be used in this experiment? this is from are Benzil lab
Monday, November 9, 2015 by John

Organic Chemistry 2
Compare the IR spectrum of benzoin ) with the IR spectrum of benzil . Explain how the changes in the important peaks are related to the differences between the two structures.
Monday, November 9, 2015 by John

Chemistry
Which of the following nitrogen-containing compounds would supply the most nitrogen per gram of fertilizer? a. iron azide, Fe(N3)2, MW = 140 g/mol b. sodium azide, NaN3, MW = 65 g/mol c. potassium nitrite, KNO2, MW = 85.1 g/mol d. potassium azide, KN3, MW = 81.1 g/mol e. There...
Monday, November 9, 2015 by Sarah

Chemistry
The thermal decomposition of carbonates leads to the loss of CO2. The decomposition of an unknown carbonate leads to a 35.1% weight loss. The unknown was which of the following compounds? A. Li2CO3 B. MgCO3 C. CaCO3 D. ZnCO3 E. BaCO3 How do I solve this?
Monday, November 9, 2015 by Anonymous

chemistry
the heat capacity of copper is 0.382J/g degrees celsius. a 22.6g sample of copper at 93 degrees celsius is placed in 50g of water at 23.9 degrees celsius. what is the final temperature of the system?
Monday, November 9, 2015 by zainab

chemistry
a metal sample having a temperature of 100 degrees Celsius and a mass of 45.2g was placed in 50g of water with a temperature of 26 degrees Celsius. at equilibrium, the final temperature was 32.7 degrees Celsius. a)how much heat flowed into the water? b)what is the heat ...
Monday, November 9, 2015 by zainab

chemistry
the process of respiration, glucose is oxidized completely. In fermentation, O2 is absent, and glucose is broken down into Co2 and H2o. Calculate delta g for respiration of 1.00 g of glucose Calculate delta g for fermentation of 1.00 g of glucose. My answers: -16.0 kJ and -1....
Monday, November 9, 2015 by Juidith

chemistry
Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. (a) Find ÄH°rxn, ÄG °rxn, and ÄS °rxn, given these data at 298 K: (b) At what temperature is the reaction spontaneous? What ...
Monday, November 9, 2015 by Dalton

chemistry
Enter a chemical equation for the ionization in water of CH3CH2COOH. Is the acid strong or weak? Select the Lewis structure for the ion formed by the acid when it ionizes. Chemical equation: Note: Include physical states.
Monday, November 9, 2015 by y

Chemistry
the process of respiration, glucose is oxidized completely. In fermentation, O2 is absent, and glucose is broken down into Co2 and H2o. Calculate delta g for respiration of 1.00 g of glucose Calculate delta g for fermentation of 1.00 g of glucose. My answers: -16.0 kJ and -1....
Monday, November 9, 2015 by Judith

Chemistry
Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to include states for the ...
Monday, November 9, 2015 by Kyson

Organic Chemistry
How am I supposed to do these questions? I'm completely lost. A 0.120 M solution of an enantiomerically pure chiral compound D has an observed rotation of 0.12° in a 1-dm sample container. The molar mass of the compound is 130.0 g/mol. (b) What is the observed rotation...
Sunday, November 8, 2015 by Jeff

Organic Chemistry
What observed rotation is expected when a 1.44 M solution of (R)-2-butanol is mixed with an equal volume of a 0.720 M solution of racemic 2-butanol, and the resulting solution is analyzed in a sample container that is 1 dm long? The specific rotation of (R)-2-butanol is –...
Sunday, November 8, 2015 by Mary

chemistry
Assume that 268mL of 5.00M NaOH are diluted to a final volume of 574mL with water. What is the final molarity of NaOH (FM=40.0).
Sunday, November 8, 2015 by Morgan

Chemistry (Check)
Ammonia can be produced in a two-step process. First, nitrogen reacts with red-hot magnesium to form magnesium nitride. Then magnesium nitride reacts with water to form magnesium hydroxide and ammonia. A. Write each balanced chemical reaction. B. How many grams of magnesium ...
Sunday, November 8, 2015 by Anonymous

Chemistry (Check)
Ammonia can be produced in a two-step process. First, nitrogen reacts with red-hot magnesium to form magnesium nitride. Then magnesium nitride reacts with water to form magnesium hydroxide and ammonia. A. Write each balanced chemical reaction. B. How many grams of magnesium ...
Sunday, November 8, 2015 by Anonymous

chemistry
Calculate ΔGo (in J) for 2 moles of electron(s) in each half-reaction and a standard potential of 0.44 V
Sunday, November 8, 2015 by moe

Chemistry
The thermal decomposition of carbonates leads to the loss of CO2. The decomposition of an unknown carbonate leads to a 35.1% weight loss. The unknown was which of the following compounds. A. Li2CO3 B. MgCO3 C. CaCO3 D. ZnCO3 E. BaCO3
Sunday, November 8, 2015 by Anonymous

chemistry
the process of respiration, glucose is oxidized completely. In fermentation, O2 is absent, and glucose is broken down into Co2 and H2o. Calculate delta g for respiration of 1.00 g of glucose Calculate delta g for fermentation of 1.00 g of glucose. My answers: -16.0 kJ and -1....
Sunday, November 8, 2015 by Judith

Chemistry
Calculate the molarity of a solution prepared by dissolving 10.0 grams of NaOH and then diluting the solution to 500mL.
Sunday, November 8, 2015 by Anonymous

chemistry
Suppose that 2.69 mol of hydrogen gas occupies a 64.6 L steel tank. At what temperature in °C will the pressure in the tank be 1,383 torr?
Sunday, November 8, 2015 by heri

chemistry
a solution is known to contain Cl, NO3, NO2, and SO4 ions. which of these ions can be positively identified?
Sunday, November 8, 2015 by Frank

chemistry
why wouldn't HCl be a good acid to use to determine the solubility of a silver precipitate in acid soulution?
Sunday, November 8, 2015 by Frank

Chemistry
For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, /explain/ how this result occurs a) after removing the flask from the water bath, the experimenter cools the flask to room ...
Sunday, November 8, 2015 by S

Chemistry
How would you balance this equation?? Ba(NO3)2 + NH2SO3H + H2O -> Ba(NH2SO3)2 + HNO3 Would you have to make the H2O 0, ultimately removing H2O from the equation (is that even allowed?), or is there another way of balancing it??
Sunday, November 8, 2015 by Georgia

Chemistry
It is common in this experiment for students to calculate percent yields for the reaction that are above 100%. Is this result a violation of the law of conservation of matter? I need help writing an essay based on this prompt.
Sunday, November 8, 2015 by Eduardo

Chemistry
How many moles of phosphorus atoms are in 100 grams of P4S10?
Sunday, November 8, 2015 by Anonymous

Chemistry
How many atoms of carbon are present in 49 g of a compound that is 54 . 1% carbon, by weight?
Sunday, November 8, 2015 by Ashley

Chemistry
Which of the following nitrogen-containing compounds would supply the most nitrogen per gram of fertilizer? a. iron azide, Fe(N3)2, MW = 140 g/mol b. sodium azide, NaN3, MW = 65 g/mol c. potassium nitrite, KNO2, MW = 85.1 g/mol d. potassium azide, KN3, MW = 81.1 g/mol e. There...
Sunday, November 8, 2015 by Anonymous

chemistry
How much pure calcium carbonate (100.09 g/mol) is required to produce 40.0 mL carbon dioxide gas according to the reaction used in this experiment? Your unknown will contain between 25-100% calcium carbonate. Answer to 3 significant figures. Do not include the unit, g. Hint...
Sunday, November 8, 2015 by chem

Chemistry
Arrange the following in order of increasing mass: 1. one F atom 2. 1x10^-20 mol of F 3. 1x10^-20g of F 4. one F2 molecule A. 1<2<3<4 B. 1<4<3<2 C. 3<1<2<4 D. 2<1<3<4 E. none of these I'm thinking C
Sunday, November 8, 2015 by Anonymous

Chemistry
You synthesized copper (I) chloride and copper (I) oxide. How do they differ from their copper (II) analogs? comment on the stability of these moist solids in air. If unstable, what is the likely product of decomposition? -I'm not really sure where to go with this one, ...
Sunday, November 8, 2015 by Dan

Organic Chemistry 2
What is the impurity that must be removed from the benzaldehyde reagent before it can be used in this experiment? this is from are Benzil lab in this lab, benzoin condensation of benzaldehyde will be carried out with a biological coenzyme, thiamine hydrochloride, as the ...
Sunday, November 8, 2015 by John

Organic Chemistry 2
What is the purpose of adding NaOH ot the reaction? This is the from our Benzil Lab.
Sunday, November 8, 2015 by John

Organic Chemistry 2
Compare the IR spectrum of benzoin ) with the IR spectrum of benzil . Explain how the changes in the important peaks are related to the differences between the two structures.
Sunday, November 8, 2015 by John

Chemistry
Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot. Could we ...
Sunday, November 8, 2015 by Justin

Chemistry
Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot. Could we ...
Sunday, November 8, 2015 by Justin

Chemistry
Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot. Could we ...
Sunday, November 8, 2015 by Justin

Chemistry
For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, /explain/ how this result occurs a) after removing the flask from the water bath, the experimenter cools the flask to room ...
Sunday, November 8, 2015 by S

Chemistry (Ksp and Solubility)
Kindly answer my query as early as possible.Please solve the complete question A solution contains 0.01M Ag+ and 0.001M Ba+2 . ksp of Ag2CrO4 = 2.4*10e-12 ksp of BaCrO4 = 1.17*10e-10 A solution of K2CrO4 is added to this solution. Which will precipitate first,Silver chromate ...
Sunday, November 8, 2015 by Bilal Asif

Chemistry
How do I calculate the percent yeild of copper give the mass and concentration of Cu(NO3)2 and the final mass of copper
Sunday, November 8, 2015 by Dan

Chemistry
Ammonia can be produced in a two-step process. First, nitrogen reacts with red-hot magnesium to form magnesium nitride. Then magnesium nitride reacts with water to form magnesium hydroxide and ammonia. How many grams of magnesium would we have to start with to prepare 15.0 ...
Sunday, November 8, 2015 by Anonymous

Chemistry
Nitrogen can also be produced from sodium metal and potassium nitrate by the reaction: Na(s) +KNO3 (s) --> K2O(s) +Na2O(s) + N2(g) If we generate oxygen by the thermal decomposition of potassium chlorate: 2KClO3(s) --> 2KCl(s) +3O2(g) How many grams of potassium nitrate ...
Sunday, November 8, 2015 by Ka_Chin

Chemistry
the process of respiration, glucose is oxidized completely. In fermentation, O2 is absent, and glucose is broken down into Co2 and H2o. Calculate delta g for respiration of 1.00 g of glucose Calculate delta g for fermentation of 1.00 g of glucose. My answers: -16.0 kJ and -1....
Sunday, November 8, 2015 by Judith

Chemistry
Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to include states for the ...
Sunday, November 8, 2015 by Kyson

chemistry
Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. (a) Find ÄH°rxn, ÄG °rxn, and ÄS °rxn, given these data at 298 K: (b) At what temperature is the reaction spontaneous? What ...
Sunday, November 8, 2015 by Dalton

Chemistry
For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, /explain/ how this result occurs a) after removing the flask from the water bath, the experimenter cools the flask to room ...
Sunday, November 8, 2015 by S

Chemistry
is it easy to distinguish between between the different oxidation states of copper? why? -I answered yes because copper (I) is not as stable as copper (II), and there is a noticeable colour difference You synthesized copper (I) chloride and copper (I) oxide. How do they differ...
Sunday, November 8, 2015 by Dan

Chemistry
In a copper cycle lab if I add HCl to CuO to produce CuCl, what would a word equation for that reaction be? Is it a chemical reaction? and also for that step what complexes are observed? what does that mean?
Sunday, November 8, 2015 by Dan

Chemistry
For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, /explain/ how this result occurs a) after removing the flask from the water bath, the experimenter cools the flask to room ...
Sunday, November 8, 2015 by S

chemistry
calculate the mass in grammes of copper that will be deposited by dissolving 6.5g of zinc in copper tetraoxosulphate(vi) solution
Sunday, November 8, 2015 by jer

Chemistry
I recently calculated for concentration needed to my solution to get -1.5MPa PEG 6000 and I got 0.05g PEG/g H2O but I don't know how to convert this to moles/ L which is more familiar to me and more easier for preparing solutions. Please help.Thank you very much.
Sunday, November 8, 2015 by KIM:Please help me!

Grade 12 Chemistry
5.85gof Naclis Dissolvedin250mlofsolution.Calculatethem​ass%ofsolute?
Sunday, November 8, 2015 by Minibel

Chemistry
1. is it easy to distinguish between between the different oxidation states of copper? why? 2. You synthesized copper (I) chloride and copper (I) oxide. How do they differ from their copper (II) analogs? comment on the stability of these moist solids in air. If unstable, what ...
Sunday, November 8, 2015 by Dan

Chemistry
In a copper cycle lab if I add HCl to CuO to produce CuCl, what would a word equation for that reaction be? Is it a chemical reaction? and also for that step what complexes are observed? what does that mean?
Sunday, November 8, 2015 by Dan

Chemistry
Calculate the number of ion 16g H2CO3
Sunday, November 8, 2015 by Jia

chemistry
name three characteristics of nonmetals
Saturday, November 7, 2015 by tanya

Chemistry
An electron of a hydrogen atom falling from n=3 in the excited state to back to ground state gives off about 12eV. what form the "light" will it give off?
Saturday, November 7, 2015 by Giselle

Organic Chemistry 2
Compare the IR spectrum of benzoin ) with the IR spectrum of benzil . Explain how the changes in the important peaks are related to the differences between the two structures.
Saturday, November 7, 2015 by John

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