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June 30, 2016

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

Chemistry
What is a good website to practice limiting reagent problems?
Tuesday, August 25, 2015 by Jordan

chemistry
Will you help me use the half reaction method to balance these equations. I need to add water molecules and hydrogen ions in acid solutions. I also need to keep the balanced equations in net ionic form. thanks 1) Cl-(aq) + NO3-(aq) --> ClO-(aq) +NO(g) (in acid solution) 2) ...
Monday, August 24, 2015 by CLO

Chemistry
Can you please help me write the oxidation and reduction half reactions represented in each of these redox equations, and help me write the half reactions in net ionic form if they occur in aqueous solution. 1) PbO(s) + NH3(g) --> N2(g) + H2O(l) + Pb(s) 2) I2(s) + Na2S2O3(...
Monday, August 24, 2015 by sydney

chemistry
1 A metal X that raects with metal Y in a solution of Y but does not react with Z in a solution of Z means that --------------. Metal Y is the least reactive Metal X is the least reactive Metal Z is the least reactive Metal Y and metal Z have equal reactivity 2 Oxidation can ...
Monday, August 24, 2015 by mike

chemistry
1 In the reaction of potassium permanganate and iron salt in acidic medium, how many moles of manganese reacted with iron? 2 moles of Mn with 1 mole of Fe 1 mole of Mn with 5 moles of Fe 1 mole of Mn reacts with 1 mole of Fe 5 moles of Mn reacts with 1 mole 2 Which of the ...
Monday, August 24, 2015 by mikel

chemisrty
1 When chemicals pour on the skin, the laboratory first aid is to ---------------. Apply 1% sodium carbonate Apply 1% boric acid solution Flush the eye with a copious amount of clean lukewarm running water Wash with soap and warm water 2 For cut sustained in the laboratory ...
Monday, August 24, 2015 by mikel

Chemistry
How long will it take for a 18.0-g sample of iodine-131 to decay to leave a total of 2.25 g of the isotope? The half-life of iodine-131 is 8.07 days
Sunday, August 23, 2015 by Jillian

Chemistry
You have 75.0 mL of a 2.50 M solution of Na2CrO4 (aq). You also have 125 mL of a 2.15 M solution of AgNO3 (aq). Calculate the concentration of NO3 when the two solutions are added together.
Saturday, August 22, 2015 by Sarah

chemistry
So im tasked to make an aspirin, could you please help me think of a cute or awesome name for my aspirin?
Saturday, August 22, 2015 by rocelle

Chemistry
A compound contains 84% carbon and 10% hydrogen.find the emperical formula.
Friday, August 21, 2015 by Sanni

Chemistry
Experiment 1: A has .20 M, B has .20 M and the initial rate is 2.0*10^-4M/min Experiment 2: A has .20 M, B has .40 M, and the initial rate is 8.0*10^-4M/min Experiment 3: A has .40 M, B has .40 M, and the initial rate is 1.6*10^-3M/min Using the data above, answer the ...
Thursday, August 20, 2015 by Finn

Chemistry
How many grams of product are formed from 2.0 mol of N2 (g) and 8.0 mol of Mg(s)? Show all calculations leading to an answer.
Thursday, August 20, 2015 by Robi

CHEMISTRY URGENT HELP
carbon dioxide is moderately soluble in cold water but is completely boiled out if the water is boiled.Solubility increases rapidly with pressure. How is the above phenomenon used in the production of aerated drinks?
Thursday, August 20, 2015 by clive

The Chemistry of Life Quiz // Just Answers please
Which of the following are considered macromolecules? Select all that apply. (2 points) nitrogen lipids proteins*** carbon*** Which property allows water to stick to glass? (1 point) cohesion**** suspension adhesion solution How many valence electrons does carbon have ...
Thursday, August 20, 2015 by XenaGonzalez

Chemistry
how would the presence of a white solid in a solution effect the solution's absorbance? it made its absorbance higher, but i'm not too sure why
Thursday, August 20, 2015 by Casey

Dimensional Analysis Chemistry
want someone to check if this is right, Q: The concentration of lead in drinking water in a home was found to be 2.1x10-9 M. What is the concentration in ppm? ppb? MM=207.2 g/mol. 1 ppm = 1 mg/L. A: 2.1x10^-9 mol/L x 207.2 g/ 1 mol x 1000 mg / 1 g = 4.35x10^-4 ppm. and that is...
Wednesday, August 19, 2015 by paul

Chemistry
A buffer is made by mixing 100 mL of 0.25 M acetic acid (CH3COOH) and 150 mL of 0.10 M sodium acetate (CH3COONa). Calculate the pH of the solution after 0.5g of solid NaOH is added to the solution (Given Ka (CH3COOH) =1.8 x 10-5)
Wednesday, August 19, 2015 by Jaden

Chemistry
A mixture of C3H8 and C2H2 has a mass of 2.5 g . It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.5 times as many moles of CO2 as of water. Find the mass of C2H2 in the original mixture.
Wednesday, August 19, 2015 by Sunny

Chemistry
Predict whether the following reactions would be spontaneous or not under standard conditions or if it's impossible to tell. 2 KClO3(s) + 3 C(s) --> 3CO2(g) + 2KCl(s) Exothermic 2 NO(g) + O2(g) --> 2NO2(g) Exothermic H2(g) + Zn(ClO3)2(s) --> 2HClO3(l) + Zn(s) ...
Tuesday, August 18, 2015 by Finn

Chemistry
Calculate the pH of a potassium phosphate buffer if the pKa of KH2PO4 is 7.2 and the acid-base ratio is 2:1 I took Chemistry 7 years ago and am in a review for a Biochem course I am takin. I do not remember the basics so any help with how to get started or what equations to ...
Tuesday, August 18, 2015 by Liz

chemistry
/Users/Sydneyvanalphen/Desktop/Screen Shot 2015-08-18 at 3.21.30 PM.png hi i need help with this homework problem I don't get how they are getting the answer 75?
Tuesday, August 18, 2015 by sydney

Chemistry
1) A reactions has a delta H of -76 Kj and a delta S of -117 J/K. Is the reaction spontaneous at 298 K? Work: Delta G= -76kJ/mol - 298K(-117J/K/1000) Delta G= -41.134 Spontaneous 2) A reaction has a delta H of 11 kJ and a delta S of 49 J/K. Calculate the delta G at 298 K. Is ...
Tuesday, August 18, 2015 by Finn

Chemistry
During its combustion, ethane combines with oxygen to give carbon dioxide and water. A sample of ethane was burned completely and the water that formed has a mass of 1.61 grams. How many grams of ethane were in the sample?
Tuesday, August 18, 2015 by Margaleta

chemistry
what are the precautions taken while preparing tris(acetylacetonato)-manganese 3 from potassium permanganate and acetylacetone.
Tuesday, August 18, 2015 by elina

chemistry
How can DRY calcium carbonate be prepared from sodium carbonate? Na2Co3 + CaCl2 --- NaCL + CaCo3. but how to get dry calcium carbonate
Monday, August 17, 2015 by clive

chemistry
Ethane burns in limited supply of air to give carbon monoxide. What would be the balanced equation for it?
Monday, August 17, 2015 by Anonymous

chemistry
what is the number of moles of Fe2O3 formed when 5.6liter of O2 reacts with 5.6g of Fe?
Monday, August 17, 2015 by swetha

chemistry
Balance by partial methods P4 + hno3 = h3po4+ no2+h2o
Monday, August 17, 2015 by raman

CHEMISTRY
ARRANGE THE FOLLOWING 0.1 M SOLUTIONS IN ORDER OF INCREASING PH
Monday, August 17, 2015 by Anonymous

Chemistry
Why may the absorbance of a filtrate be higher than it's theoretical concentration?
Sunday, August 16, 2015 by Hannah

Chemistry
I have a problem that says: Copper is an excellent electrical conductor widely used in making electric circuits. In producing a printed circuit board for the electronics industry, a layer of copper is laminated on a plastic board. A circuit pattern is then printed on the board...
Sunday, August 16, 2015 by Kerry

Chemistry H
"When you pulled the steel wool apart, you found that the mass was unchanged. When you heated the steel wool, you found that the mass changed. Explain."
Saturday, August 15, 2015 by Rachel

Chemistry
All Brønsted-Lowry acids A. are aqueous solutions. B. can act as Arrhenius acids. C. donate protons. D. all of the above I got C but could it be D?
Saturday, August 15, 2015 by sydney

Chemistry
How many liters of Carbon Dioxide are formed by burning 6011.0 grams of C3H7OH with excess of oxygen gas and is carried out at 20.00 degrees Celsius, and 1.150 atm of pressure. I know this needs PV=nRT but the burning and excess part is throwing me off. Please help me learn ...
Saturday, August 15, 2015 by Alicia

chemistry
Outline the following synthesis: a) 2 – methyl propene -> 2-methyl-2-propanol. b) 3 –ethylpentene -> carbon dioxide, water and 2-ethylbutanoic acid. c) 2 methyl-2-pentene -> 2-chloro-2-methylpetane and 3-chloro-2-methylpentane d) 1-ethylcyclohexene -> 1-...
Saturday, August 15, 2015 by aiman

Chemistry
We were testing standard solutions of Cu(NO3)2 and a filtrate of Cu(NO3)2 using a spectrophotometer and all of the absorbances recorded were higher than what they were predicted to be. Why might this be?
Friday, August 14, 2015 by Georgia

Chemistry
A buffer solution A. contains approximately equal amounts of a weak acid and its conjugate base. B. increases its properties with an increase in the concentrations of the two buffer components. C. resists changes in pH. D. all of the above I got C is that correct, to is it D? ...
Friday, August 14, 2015 by Syd

Chemistry
The equivalence point of any acid titrated with a base occurs when the A. concentration of the acid and concentration of the titrant are equal. B. mass of the acid and the mass of the titrant are equal. C. pH of the mixture of the acid and titrant is 7.0. D. volume of the acid...
Friday, August 14, 2015 by coco

Chemistry
For the reaction ? Li+? N2 →? Li3N , what is the maximum amount of Li3N which could be formed from 11.79 g of Li and 17.08 g of N2? I got 19.72 g as my final answer and I just want to make sure I am correct. If I am not can you please help me understand this problem?
Friday, August 14, 2015 by Allie

chemistry
write the balanced chemical equation for the reaction that would occur ewhen a base is added to a solution containing H2PO4-/HPO4^2- buffer system can you please help we write this balanced equation. thank you
Friday, August 14, 2015 by coco

chemistry
3-pentanol is heated with sulphuric acid (H2SO4) to become compound M. Compound M is reacted with Br2/ H2O to form Compound N. Outline the reaction step and name the compound M and N
Friday, August 14, 2015 by aiman

Chemistry
in the equation, n = cv, what is the meaning of n? I know that it stands for the number of moles, but I'm not exactly sure what that means. Our teacher wants us to mention Avogradro’s number in our explanation
Friday, August 14, 2015 by Jessica

Chemistry Ap
A sprinter completes the 100 yard dash in 9.30 seconds. How long would it take her to complete 100. meters if she continued at the same speed? 1. 10.2 sec 2. 10.9 sec 3. 10.7 sec 4. 9.30 sec
Thursday, August 13, 2015 by Jai

Chemistry
How many moles of acetic acid are present in 10.00 mL if the concentration is 0.500M HC2H3O2?
Wednesday, August 12, 2015 by Ray

Chemistry
I'm working on a problem that says: A 4.00 gram sample of a mixture of CaO and BaO is placed in a 1.00 L vessel containing Co2 at a pressure of 730 torr and a temperature of 25C. The CO2 reacts with the CaO and BaO forming CaCO3 and BaCO3. When the reaction is complete, ...
Wednesday, August 12, 2015 by Zara

chemistry
Help !determine the emprical formula of a compound w which had 34.2 of iron and 65.8 of chlorine cl35.5 fe56
Wednesday, August 12, 2015 by lol

Chemistry
Can someone explain to me what an intermediate product is and give me and example?
Wednesday, August 12, 2015 by john

chemistry
132gram o2 is required for a combustion of 28 liter mixture of ethane and ethene (at NTP) than find out mole fraction of ethane and ethene in the mixture?
Wednesday, August 12, 2015 by rekha

chemistry
how much grams of cao is produced by oxidation of 1gm of calcium
Wednesday, August 12, 2015 by Aarti

Chemistry
Starting with copper metal, describe how a sample crystals of copper 2 chloride may be prepared in the labaratory
Wednesday, August 12, 2015 by Faith

Chemistry
Explain how you would obtain solid sodium carbonate from a mixture of lead carbonate and sodium carbonate powder
Wednesday, August 12, 2015 by Faith

Organic Chemistry (University)
We're supposed to try and figure out the structure of a compound based off the the following information: δ: 2.4 2H triplet δ: 2.1 3H singlet δ: 1.5 2H triplet δ: 1.3 6H singlet δ: 0.9 3H triplet >δ: 2.4 2H triplet This is probably a CH2 ...
Tuesday, August 11, 2015 by james

Chemistry
Can you please explain to me how you would regulate the pressure to favor the products in the this equilibrium system. MgCO3(s)--><-- MgO(s)+CO2(g)
Tuesday, August 11, 2015 by coco

Chemistry
A buffer solution A. contains approximately equal amounts of a weak acid and its conjugate base. B. increases its properties with an increase in the concentrations of the two buffer components. C. resists changes in pH. D. all of the above This one is D right
Tuesday, August 11, 2015 by Lili

Chemistry
All Brønsted-Lowry acids A. are aqueous solutions. B. can act as Arrhenius acids. C. donate protons. D. all of the above I think it is D, but I also think it is c can you please tell me if either of these answers are right thanks
Tuesday, August 11, 2015 by Lola

Chemistry
All Brønsted-Lowry acids A. are aqueous solutions. B. can act as Arrhenius acids. C. donate protons. D. all of the above I am a little confused. I think it is D, but I'm second guessing myself with C
Tuesday, August 11, 2015 by Lola

Chemistry
Can you please explain to me how you would regulate the pressure to favor the products in the this equilibrium system. MgCO3(s)--><-- MgO(s)+CO2(g) Thank you
Tuesday, August 11, 2015 by Sydney

Chemistry
Can you please explain to me how you would regulate the pressure to favor the products in the this equilibrium system. MgCO3(s)--><-- MgO(s)+CO2(g) Thank you
Tuesday, August 11, 2015 by Sydney

Chemistry
if the rate of a certain reaction is 6M/hr at 273K, what would be the predicted rate at 278k with activation 30kj/mol
Tuesday, August 11, 2015 by Anonymous

nsikayethu secondary comprehensive school
physical science (chemistry).place them in order Which liquid will evaporates faster between ethanol, nail porish remover, methylated spirits and water
Tuesday, August 11, 2015 by snenhlanhla

Chemistry
The following reaction represent a propsed reaction mechanism for the formation C(C6H5)3OH from C(C6H3)3Cl. Step 1: C(C6H5)3Cl--> C(C6H5)3^+ + Cl- Step 2: C(C6H5)3^+ + OH- --> C(C6H5)3OH What are the intermediate product(s) of the net reaction? Explain your answer. So I ...
Monday, August 10, 2015 by Jake

Chemistry
An organic compound x contains 40% carbon, 6.7% hydrogen the third compound oxygen. If the relative molecular mass of the compound is 60, calculate (i) the empirical formular of x (ii) the molecular formular of x
Monday, August 10, 2015 by Akighir Reuben

Chemistry
I want to make 10 ml solution of 80% NaOH and 20% KOH
Monday, August 10, 2015 by Pratyush

chemistry
can you please explain to me why a common ion lowers the solubility of an ionic compound
Monday, August 10, 2015 by sydney

chemistry
By applying Le Châtelier’s principle to a reaction that has come to equilibrium, the reaction can be made to A. produce more reactants. B. run to completion. C. reach a new chemical equilibrium. D. All of the above Is the answer D?
Sunday, August 9, 2015 by syd

Chemistry
Before a chemical reaction reaches equilibrium, A. the reaction rates of the reactants and products increase. B. the reaction rate of the reactants increases and the reaction rate of the products decreases. C. the reaction rates of the reactants and products decrease. D. the ...
Sunday, August 9, 2015 by soco

Chemistry
Which processes are taking place in the following reaction? 2CO(g) + O2(g) ⇌ 2CO2(g) A. displacement and reduction B. synthesis and decomposition C. ionization and recombination D. sublimation and evaporation Is B right?
Sunday, August 9, 2015 by Coco

Chemistry
The following reaction represent a propsed reaction mechanism for the formation C(C6H5)3OH from C(C6H3)3Cl. Step 1: C(C6H5)3Cl--> C(C6H5)3^+ + Cl- Step 2: C(C6H5)3^+ + OH- --> C(C6H5)3OH What are the intermediate product(s) of the net reaction? Explain your answer. What ...
Sunday, August 9, 2015 by jonah

chemistry
Standard Addition Question: Serum containing Na+ gave a signal of 4.27 mV in an atomic emission analysis. Then 5.00 mL of 2.08 M NaCl were added to 95.0 mL of serum. This spiked serum gave a signal of 7.98 mV. Find the original concentration of Na+ in the serum. I can't ...
Sunday, August 9, 2015 by Phil

Chemistry
The student used the KHP in a subsequent titration experiment where he titrated 25.00 +/- 0.03 ml of the acid against an unknown solution of NaOH. The titration required 23.70 +/- 0.10 ml of the base. What is the concentration of NaOH?
Sunday, August 9, 2015 by Aaeisha

Important question regarding chemistry
Explain intermolecular hydrogen bonding with reference to ortho nitrophenol
Saturday, August 8, 2015 by Sonam

Chemistry
I'm having trouble understanding rate laws and manipulating them. So, for example, the rate law is rate= k[CO2][O3]. I was taught, maybe if I am just forgetting some pieces(been awhile), if I were to triple/double the partial pressure of CO2/O3, the rate of that element ...
Friday, August 7, 2015 by Jake

Chemistry
Radioactive decay is first order in the decaying isotope. For example, strontium-90 contained in fallout from nuclear explosions decays to yttrium-90 and a beta particle. Write the rate law for the decay of strontium-90. Can you please take me step by stem through this problem?
Friday, August 7, 2015 by Soco

Chemistry
what information must you know to calculate the boiling point elevation of a solution of hexane in benzene. Is it the temp, Kb and the molality?
Friday, August 7, 2015 by Coco

Chemistry
heating cyclopropane (C3H6) converts it to propane (CH2=CHCH3). The rate law is first order in cyclopopane. If the rate constant at a particular temp is 6.22x10^-4 s^1 and the concentration of cyclopropane is held at .0300 mol/L, what mass of propane is produced in 10.0 min in...
Friday, August 7, 2015 by Coco

Chemistry
Use the data in the table to determine how long it will take for half of the original amount of SO2Cl2 to decompose at the average reaction rate. Experimental Data for SO2Cl2(g) → SO2(g) + Cl2(g) Time (min) [SO2Cl2](M) [SO2](M) [Cl2](M) 0.0 1.00 0.00 0.00 100.0 0.87 0.13...
Friday, August 7, 2015 by Chloe

chemistry
suppose that a large volume of 3% hydrogen peroxide decomposes to produce 12mL of oxygen gas in 100 s at 298 K. Estimate how much oxygen gas would be produced by and identical solution in 100s at 308 K hi can you please help me set up this problem, then I can do the math, I ...
Thursday, August 6, 2015 by Chloe

chemistry
Calculate the molality of the solution prepared by dissolving 0.50 g (NH4)2SO4 in 50g H2O
Thursday, August 6, 2015 by amy

Chemistry
The rate law for the reaction NO + O3 > NO2 is rate= k[NO][O3]. What will the effect on the reaction rate if the partial pressure of NO is doubled? What will the effect if the partial pressure of O2 is tripled? Just for clarification: NO will be doubled and O3 would be ...
Thursday, August 6, 2015 by Liane

Opra college
Chemistry work........the volume of oxygen measured at stp will br produced on heating 24.5grams of potassium trioxochlorate(v)
Thursday, August 6, 2015 by Pelumi

Chemistry
Predict whether each of the following reactions would be spontaneous or non spontaneous under standard conditions or if it is impossible to tell with the data given. a)2KClO3(s)+3C(s)-->3CO2(g)+2KCl(s) Exothermic b) 2NO(g) + O2(g) ---> 2NO2(g) Exothermic c)H2(g)+Zn(ClO3)...
Thursday, August 6, 2015 by Ferb

DPS sub: science ( chemistry)
an element 'x' react with water to form a solution which turns phenolphthalein indicator pink .The element 'x' is most likely a) sulphur b) sodium c) carbon d) silicon
Thursday, August 6, 2015 by kristi

chemistry
Calculate the pH at the equivalence point in titrating 0.110 M solutions of each of the following with 8.0×10−2 MNaOH. Part A hydrobromic acid (HBr)
Thursday, August 6, 2015 by Anonymous

Chemistry
What is the balanced equation of reaction between glacial acid, benzoic acid and sodium hydrogen carbonate solution
Thursday, August 6, 2015 by Realone

chemistry
Why is filter paper a poor material on which to powder a solid before introducing it into a melting tube?
Thursday, August 6, 2015 by charlotte

Chemistry
What data do you need to determine whether the following reaction is spontaneous or not? 4Fe(s) + O2(g) ----> 2Fe2O2(s) Would it be temperature, delta H and delta S?
Wednesday, August 5, 2015 by Sharkeisha

Chemistry
If there are 5,280 ft=1.00 mile ,how many miles are in 50,000 ft?
Wednesday, August 5, 2015 by Lara

Chemistry
If the speed of light is 186,000 miles / sec, how far does light travel in 8.0 minutes?
Wednesday, August 5, 2015 by Sara

Chemistry(Titration)
Why is methyl orange indicator used instead of phenolpthalein when determing calcium content in a chalk by back titration
Wednesday, August 5, 2015 by Kester

college. physics and chemistry and mathematics
An element crystalline in face centred cubic lattice. CCalculate the length of the side of the unit cell if the radius of atom is200pm
Wednesday, August 5, 2015 by nerswn narzary

chemistry
What is the pH of a buffer solution if you have 250 ml of a 1.56M Acetic Acid and you added 26.56 grams of sodium acetate (NaCH3CO2)? What is the new pH if you now add 1gram of NaOH to the buffer solution?
Wednesday, August 5, 2015 by lilly

Chemistry
Determine the mass of PbSO4 produced when 10mL of 0.2M CuSO4 reacts with 10mL of 0.2M Pb(NO3)2? Balance the equation CuSO4 + Pb(NO3)2 → PbSO4 + Cu(NO3)2 Find the number of moles for CuSO4 c=n/v n=c × v n=0.2 × 0.01 n=0.002 mol Since it is a 1:1 ratio, the ...
Wednesday, August 5, 2015 by Kendall

Chemistry
What is the sign of the entropy change for the following reaction, which is the principal process taking place when mortar hardens? Ca(OH)2(s) + CO2(g) ---> CaCO3(s) + H2O(l) Would the sign of entropy be negative since a solid and gas yields a solid and what does it mean by...
Tuesday, August 4, 2015 by D

college chemistry
The air in a typical La Crosse basement contains 53 atoms of 222Rn per liter. A. If the basement has 950 ft^2 of floor space and is 8.0 feet tall, how many 222Rn atoms are there in the whole basement? B. Assuming a total pressure of 1.00 atm, what is the partial pressure of ...
Tuesday, August 4, 2015 by Sara

college chemistry
A piece of wood is discovered in the Amazon with a 14C/12C that is 64.3% that of living organisms. How old is it? I have no clue how to do this please help.
Tuesday, August 4, 2015 by Sam

Chemistry
In this reaction solid NaOH is added to approximately 100 mL of 0.500 mol/L HCl. Trial 1: 2.02 g of solid NaOH is added to 102.0 mL of the HCl solution. The temperature goes from 22.00°C to 32.0°C. Calculate the heat evolved in each trial (Q). I'm confused on how ...
Tuesday, August 4, 2015 by Emily

Urgent Chemistry
The diffusion current for a standard is 1 x 10^-4M solution of hydroquinone is 17.5 microamperes. An unknown solution of hydroquinone, when diluted hundred folds and polarographed under same conditions yielded a current of 30.5 microamperes. Calculate the concentration of ...
Tuesday, August 4, 2015 by Adeola

chemistry
What are the uses of azomethine?
Tuesday, August 4, 2015 by Edward

URGENT CHEMISTRY
1. Write the equilibrium expressions for the following reactions: a) 2 N2O(g) + O2(g)  4 NO(g) b) H2(g) + CO2(g)  H2O(g) + CO(g) c) 4 HCl(g) + O2(g)  2 Cl2(g) + 2 H2O(g) d) 3 H2(g) + N2(g)  2 NH3(g) e) H2(g) + Cl2...
Tuesday, August 4, 2015 by Michael

Chemistry
I really need help with this I am really confused with the law, I have looked at multiple examples and I am still so confused, I know you can't give me the answer, but is there anyway you could please take me through this question step by step? Use Hess's law and ...
Tuesday, August 4, 2015 by Chloe

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