Friday
September 30, 2016

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

AP Chemistry
(DrBob222 please help me) A sample of 1.97 grams of Z is dissolved into 500 grams of water which is in a styrofoam coffee cup. The temperature is monitored and is found to rise from 25.015◦C to 25.484◦C. What is ∆Hsolution for substance Z? Assume no heat is ...
Thursday, September 22, 2016 by Rachel

Chemistry
Hey, can someone help me with this? A compound containing only C, H and O was subjected to combustion analysis. A sample of 6.120×10^-2 g produced 1.601×10^-1 g of CO2 and 5.243×10^-2 g of H2O. Determine the empirical formula of the ...
Thursday, September 22, 2016 by James

Chemistry
Trying to wrap my head around this, thanks for the help: You have 8.63 moles of C2H6O2 in the following unbalanced equation: (I already balanced it, here is the balanced): C2H6O2 + 5 O2 → 4 CO2 + 6 H2O How many moles of water are produced in this reaction?
Thursday, September 22, 2016 by BHT

chemistry
Is the following sentence true or false? The value of an error must be positive.
Thursday, September 22, 2016 by Anonymous

analytical chemistry
Calculate the concentration of the initial nitrate stock solution (in ppm) if exactly 0.361 g of KNO3 is dissolved in a 1 L volumetric flask with distilled water. Here I want the concentration of nitrogen in ppm.
Thursday, September 22, 2016 by Angel

Chemistry
For a reaction N2+O2=2NO If Kc=10-30 at 25°C One Can predict with solid reason? (1) More NO is formed (2) The forward reaction goes to completion (3) The backward reaction goes to completion (4) More reactant can consumed
Thursday, September 22, 2016 by Ujala

Chemistry
For a reaction N2+O2=2NO If Kc=10-30 at 25°C One Can predict (1) More NO is formed (2) The forward reaction goes to completion (3) The backward reaction goes to completion (4) More reactant can consumed
Thursday, September 22, 2016 by Ujala

Chemistry
So I have to find the % by mass of an unknown metal that reacted with HCl to create MCl2 (with the M being unknown). Then I need to determine identity of the missing metal. I know that the final mass of the compound MCl2 is 12.47g and that the original mass of the metal M ...
Wednesday, September 21, 2016 by Krys

Chemistry
how would you prepare 250 mL solution containing the following: 0.30 M mannitol, 0.025 M phosphate buffer pH 7.5? You are given solid mannitol, kh2po4, and k2hpo4. (pKa=6.86)
Wednesday, September 21, 2016 by RP

Chemistry
How would NaHCO3 dissociate in water for a beaker diagram? Would it be Na+ and HCO3-
Wednesday, September 21, 2016 by Anonymous

Chemistry
When you mixand separate CaCO3 and SiO2 with acetic acid-vinegar, it is a chemical reaction. It bubbles and CO2 is produced. What property of CaCO3 causes this to happen? Could you explain this to me pls. I am guessing the acetic acid reacts with one of the acetic acid, but ...
Wednesday, September 21, 2016 by lulu

Organic chemistry
An unknown compound (x) melts at 60°C and is mixed with a compound (y) that melts at 45°C and is soluble in x. Will the Melting point for the mixture start below 45°? I think so, because if you look at ice and salt for an example, salt has a way higher melting ...
Wednesday, September 21, 2016 by Shay

analytical chemistry
Calculate the concentration of the initial nitrate stock solution (in ppm) if exactly 0.361 g of KNO3 is dissolved in a 1 L volumetric flask with distilled water.
Wednesday, September 21, 2016 by Angel

chemistry
6 cm/sec to mph i got 9.664mph
Wednesday, September 21, 2016 by tom

Chemistry
The solubility of copper sulphate at 0 C
Wednesday, September 21, 2016 by Fahad

maths
In a class of 60 students, the number of students who passed biology is 6 more than the number who passed chemistry. Every student passed at least one of the two subjects and 8 students passed both subjects. I) how many students passed biology? ii) how many students passed ...
Wednesday, September 21, 2016 by ob

chemistry
How many grams of fe is present in 30g of FeSO4
Wednesday, September 21, 2016 by Abdul Rehman umer

College Chemistry
Determine the concentrations of MgCl2, Mg2+, and Cl- in a solution prepared by dissolving 2.39 x 10^-4g MgCl2 in 2.50L of water. Express all three concentrations in molarity. Also display the concentrations of ionic species in part per million (ppm).
Tuesday, September 20, 2016 by Bailey

chemistry
How many mL of 0.6 M H2SO4 solution are needed to react completely with 23.62 g of Fe2O3 in the following reaction?
Tuesday, September 20, 2016 by Alex

Chemistry AP
The equilibrium constant for the formation of phosphorus pentachloride is 1.9. If the partial pressure of each gas is 0.5 atm, will the reaction (as written) proceed forward or backward to reach equilibrium? PCl3(g) + Cl2(g) PCl5(g) A. Forward, because K is greater than Q B. ...
Tuesday, September 20, 2016 by Jessie

chemistry
2NO+O2->2NO2 a) During a certain interval of time the variation of oxygen O2 moles is -5mol. Calculate the variation of the number of moles of nitrogen monoxide NO and that of nitrogen dioxide NO2 during the same interval of time. b) The duration during which the variation ...
Tuesday, September 20, 2016 by angy

science chemistry
balance Redox :- CuS + SO4²- = CuO+SO2
Tuesday, September 20, 2016 by Yashvi

Chemistry
How many grams of CO2 is produced from 855 grams of C6H12O6 in the process of cell respiration? Please further discuss the solution on how to get convert the mols of glucose to mols of CO2. Thank you.
Tuesday, September 20, 2016 by Anonymous

Chemistry
You have to work with 240 mL of a liquid. You are provided with 250 mL, 400 mL and 800 mL beakers. Which would be the best size of beaker to use? Which would be the worst size? Explain your reasoning. A 250 beaker has graduations every 25 mL. With what accuracy can you ...
Tuesday, September 20, 2016 by Lisa

maths
In a class of 80 students, 53 study Art, 60 study Biology, 36 study Art and Biology, 34 study Art and Chemistry, 6 study Biology only and 18 study Biology but not Chemistry. Illustrate the information on a Venn diagram. Determine the number of students who study (I) Arts only...
Tuesday, September 20, 2016 by Kwame

Chemistry
10. Use the accepted Ksp value of Calcium hydroxide to calculate the following: a. What is the most calcium hydroxide that can be dissolved in 1.0 Liters of de-ionized water? b. What is the most calcium hydroxide that can be dissolved in 125.0 ml of de-ionized water? c. What ...
Tuesday, September 20, 2016 by John

Chemistry
A sample of 5.52 grams of NaOH is dissolved into 659 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 1.52 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the final solution?
Monday, September 19, 2016 by Greatest

Chemistry
If 33.8 mL of lead(II) nitrate solution reacts with excess sodium iodide to yield 0.865g of precipitate, what is the molarity of the lead(II) ions in the original solution? im not exactly sure how to start this problem. But i went ahead and gave it a shot .865 PbI2 x 1 mol ...
Monday, September 19, 2016 by Anonymous

Chemistry
The mass of an empty container is 91 g. The mass of the container filled with water is 111 g. What is the volume of the container? The density of water is 1 g/cm3 .Answer in units of cm3 20cm3 016 (part 2 of 5) 1.0 points The container was emptied, dried, and a piece of metal ...
Monday, September 19, 2016 by Katie

Chemistry
How does the polarity of water cause its cohesive property? Describe with an example that we can actually see. I really need help with this!!! Especially on describing an example that we can actually see..... Can someone please explain this to me and give me an example?
Monday, September 19, 2016 by Starcatcher

science chemistry
balance Redox :- CuS + SO4²- = CuO+SO2
Monday, September 19, 2016 by Yashvi

chemistry
One isotope of a nonmetallic element has mass number 16 and 7 neutrons in the nucleus. The anion derived from the isotope has 10 electrons. Write the symbol for this anion. I thought the answer was O^2- but this isnt correct
Monday, September 19, 2016 by Dani

chemistry
The diameter of a neutral neon atom is about 1.4 ✕ 10^2 pm. Suppose that we could line up neon atoms side by side in contact with one another. Approximately how many neon atoms would it take to make the distance from end to end 1 cm? I did 1.4 x 10^2 pm x (1 m/10^9 pm) ...
Monday, September 19, 2016 by Dani

chemistry
How many kilojoules are required to melt 15g of ice at 0 degrees C, and raise the temperature of the liquid that forms to 85 degrees C?
Monday, September 19, 2016 by Todd

Chemistry help please!
Why does a clear, saturated solution of PbI2 form a yellow precipitate when a small amount of KI is added to the solution? A. KI is insoluble in PbI2. B. PbI2 is always insoluble in water. C. Adding KI is like adding I-, which drives the reaction toward the formation of I-. D...
Monday, September 19, 2016 by Laura

Chemistry please help!
What happens to the following reaction at equilibrium if the pressure is decreased? 2H2(g) + O2(g) 2H2O(g) A. The equilibrium shifts left because Q > K. B. The equilibrium shifts right because Q < K. C. The equilibrium shifts left because Q < K. D. The equilibrium ...
Monday, September 19, 2016 by Laura

CHEMISTRY
BLEACHING AGENT OF CHLORINE(Cl)
Monday, September 19, 2016 by MWOMBEKI'S SON

Chemistry
Heating 1.0 mole of ammonia and 1.0 mole of molecular nitrogen at 723k in a 10L flask,the following equilibrium is observed: N2(g)+3H2(g)=2NH3(g) when the equilibrium is reached ,0.40 moles of molecular hydrogen are present in the flask,determine Kp and Kc and equilibrium ...
Monday, September 19, 2016 by Gianna mele

Chemistry
H2S decomposes at 438k ,according to the following equilibrium: H2S(g)=H2(g)+S(s) Knowing that Kc=1.1*10-2,determine the gram amount of sulfur formed at the equilibrium coditions in a 5L flask ,where the initial concentration of H2S was 0.7M. Also,calculate Kp.
Monday, September 19, 2016 by Gianna mele

Chemistry
10g of NOBr were added to a 5L flask and the temperature was fixed to 350K. The following equilibrium is reached : NOBr(g)=NO(g)+1/2Br2(g);The pressure measured at the equilibrium was 0.63 atm.Determine Kp and Kc. I need help to solve this problem.I already done 50% but at the...
Monday, September 19, 2016 by Gianna mele

Chemistry
If you had dehydrated 1.00g of the hydrate CaCl2 ∙6H2O how many grams of anhydrous CaCl2 would you expect to be produced? Show calculations. I really am having a hard time with this question. I don't know where to start and how to perform it.
Sunday, September 18, 2016 by Chris

Chemistry
a. Write and balance the equation for the reaction of calcium carbonate with hydrochloric acid, then answer the following questions. b. What mass of calcium carbonate is required to neutralize 83.5mL of 6.00M HCl? does the balanced equation have any significance in this ...
Sunday, September 18, 2016 by Anonymous

Chemistry
How do i calculate these and express the answers in significant digits? 2.865 x 10^4m x 1.47 x 10^3 8.071 cm^2/ 4.216 1.142 x 10^-8 mm^2 / 8.5 x 10^-4 mm i tried the first one and got 4212. but i don't know if it's right
Sunday, September 18, 2016 by Holfbrincl

Chemistry
Calculate the concentration of chloride ions in the following solution. 73.28g of sodium chloride in 862. mL of solution. would it be 73.28g x 2 / 58.44g NaCl = 2.50 mol of Cl 2.50 mol Cl / .862 L = 2.91 M Cl
Sunday, September 18, 2016 by Anonymous

Chemistry
1.0 x 10^5 mL=m^3
Sunday, September 18, 2016 by Anonymous

Chemistry
Calculate the number of moles of Cl atoms in 6.28 mg CuCl2.
Sunday, September 18, 2016 by Collin

chemistry
suppose that you have a micro pipet which delivers 100 drops per cubic centimeter, and a solution of 5.0% by volume of oil in alcohol. if you had used 10 drops of this solution, how many cubic centimeters of pure oil would be left after evaporation of the alcohol?
Sunday, September 18, 2016 by diana

Chemistry
There have been two ways on making transuranium elements: neutron bombardment and a)beta bombardment b)gamma bombardment c)positron bombardment d)photon bombardment e)heavy atom bombardment
Sunday, September 18, 2016 by Mark

chemistry
a graduated cylinder containing 75.0 mL of water has a mass of 149.86 g. A piece of metal is added to the cylinder and the volume of the water changes to 86.3 mL. The mass of the graduated cylinder, water and metal rises to 218.90 g.
Sunday, September 18, 2016 by nicholas

calculus and chemistry
A container of hot liquid is placed in a freezer that is kept at a constant temperature of 10°F. The initial temperature of the liquid is 160°F. After 5 minutes, the liquid's temperature is 60°F. How much longer will it take for its temperature to decrease to ...
Sunday, September 18, 2016 by Sarah

Chemistry
The mineral dolomite has the formula caco3.mgco3. When dolomite is heated for an extended period of time at elevated temperature it decomposed to give carbon dioxide and a mixture of calcium oxide and magnesium oxide. If a 5.424 g sample of the mineral is heated for several ...
Sunday, September 18, 2016 by Andin

Chemistry
KMnO4 + H2SO4 + H2S will give K2SO4 + MnSo4 + H20 + S
Sunday, September 18, 2016 by Himanshu

Chemistry
pH indicators change color at their _____. The pH at which the color change happens for a particular indicator molecule depends on its: A. pKa; concentration. B. pKa; Ka or Kb. C. equivalence point; Ka or Kb. D. equivalence point; concentration. Is the correct answer A?
Sunday, September 18, 2016 by Laura

CHEMISTRY
As a technician in a large pharmaceutical research firm, you need to produce 450. mL of 1.00 M a phosphate buffer solution of pH = 7.20. The pKa of H2PO4− is 7.21. You have 2.00 L of 1.00 M KH2PO4 solution and 1.50 L of 1.00 M K2HPO4 solution, as well as a carboy of pure...
Sunday, September 18, 2016 by jess

Chemistry
You are required to prepare 100g of potassium nitrate crystals from its saturated solution at 75 degree Celsius. If the solubility of potassium nitrate at 75 degree Celsius is 155g and 20 degree Celsius is 31g, find the weight of potassium nitrate solution at 75 degree Celsius...
Sunday, September 18, 2016 by Sagnik

Chemistry
Given the reaction: Cu2+(aq) + S2-(aq) CuS(s) What will happen (a) if CuSO4(aq) is added? And (b) if Na2SO4(aq) is added? A. (a) Nothing; (b) Less product will form B. (a) Less product will form; (b) Nothing C. (a) Nothing; (b) More product will form D. (a) More product will ...
Sunday, September 18, 2016 by Laura

Chemistry
At a high temperature, the equilibrium constant for the decomposition of hydrogen iodide is 65.0. If the initial concentration of HI is 1.60 M, what is the concentration of hydrogen at equilibrium? 2Hl(g) H2(g) + I2(g) A. 1.42 M B. 0.753 M C. 0.240 M D. 0.802 M I think that ...
Sunday, September 18, 2016 by Laura

Chemistry
How many grams of CO2 is produced from 855 grams of C6H12O6 in the process of cell respiration?
Sunday, September 18, 2016 by Anonymous

chemistry
How many grams of FeBr 3 would be present in 150.0 mL of a 0.435 M FeBr 3 solution?
Sunday, September 18, 2016 by lana

Chemistry
an empty graduated cylinder weighs 82.450g. when gilled tp 50.0 mL with a liquid it weighs 110.810g. what is the density of the liquid?
Saturday, September 17, 2016 by Troy

Chemistry
Which of the following has no effect on the rate ofa reaction? a)degree of branching or size of reactant molecules b)value of Heat of reaction c)presence of a catalyst d)temperature of the reactants e) concentrations of the reactants
Saturday, September 17, 2016 by Mike

Chemistry
For the reaction C2H4Br2+ 3KI>C2H4+2KBr+KI3, when the rate of reaction is 2.0x10^-5, what is the rate of disappearance of KI?
Saturday, September 17, 2016 by Mike

Chemistry
Convert a density of 13.6g/ml to lb/ft^3
Saturday, September 17, 2016 by Anonymous

Chemistry
2.36 x 10^4 s= ? days
Saturday, September 17, 2016 by Anonymous

Chemistry
The pH of your swimming pool is found to be 6.89. What is the concentration of H+ ions in the pool? A. 7.76 × 106 M B. 0.84 M C. 1.29 × 10-7 M D. 1.29 × 107 M
Saturday, September 17, 2016 by Laura

Chemistry
Which of the following pairs would make a good buffer? A. H2C2O4 and HC2O4- B. HNO3 and NO3- C. NaOH and NaCl D. HCl and NaOH Would it be C? I think I remember learning about these in a lesson about buffers, hence why my instinct is to go with C...
Saturday, September 17, 2016 by Laura

Chemistry
A solution has [OH-] = 3.5 × 10-6. Based on that, what must be true about this solution? A. It is an acidic solution. B. It is a strong base. C. It is a strong acid. D. It is a basic solution.
Saturday, September 17, 2016 by Laura

Chemistry
When are more products of a reaction available initially than at equilibrium? A. K = 0 B. Q < K C. Q = K D. Q > K
Saturday, September 17, 2016 by Laura

chemistry
A mixture of SO3,SO2 and O2 gases is maintained in 10litre flask at which the Kc for reaction is 100 . If number of moles of SO2 and SO3 are equal then how many moles of O2 present.
Saturday, September 17, 2016 by snehi kashyap

chemistry
calculate the number of moles and mass of methane (ch4) required to produce 11 kg of carbondoxide(co2) when combusted ?
Saturday, September 17, 2016 by anu

Chemistry
assume that a drop has a volume of o.o5 ml. if a titration requires 30.00 ml for completion, what % error will each extra drop over 30 ml cause? is it 30.05-30 divided by 30 then times 100 which is equal to 0.17 %
Saturday, September 17, 2016 by Renae

Science Chemistry
A saturated solution of kcl is prepared at 25degree celsius. What would happen if temperature is cooled to 10degree celcius?
Saturday, September 17, 2016 by Jim

Chemistry
1.Name the raw materials used in the manufacture of Sodium Carbonate by Solvay process.
Friday, September 16, 2016 by Tonoy

Inorganic Chemistry
1) Ethylene has a D2h point group. a. List every symmetry operation for ethylene. b. Write a transformation matrix for each operation and describe the effect that each operation has on the molecule’s coordinates in (x,y,z) Thank you!
Friday, September 16, 2016 by Saki

chemistry
For a deep descent,a scuba diver uses of helium and oxygen with a total pressure of 8.00 atm. If the oxygen has a partial pressure of 1200 mmHg , what is the partial pressure of the helium?
Friday, September 16, 2016 by alleah

chemistry
1.000 g of bronze was dissolved in the mixture of acids. The solution was transferred into 100 ml volumetric flask and filled to the mark. 10 ml aliquote of this solution was transferred into another 100 ml flask and diluted to the mark. 10 ml of the resulting solution was ...
Friday, September 16, 2016 by EMEKA

Chemistry
CHCl3 + MnO4- = Cl2 + CO2 + Mn+2 Balance the above with half reactions in acidic medium. For the above reaction, can you please show the half reactions...which is getting oxidised...both C and Cl's oxidation # are changing showing both getting oxidised,.how is this ...
Friday, September 16, 2016 by Maria

Chemistry
What are the other two independent other than concentration for reaction of hydrochloric acid with calcium carbonates. And what are thier control variable?
Friday, September 16, 2016 by Zee

value chemistry
observation made when chlorine is bubbled through sodium iodide
Friday, September 16, 2016 by value mwende

chemistry
Describe how would accurately prepare one litre of 150 ppm using copper
Friday, September 16, 2016 by hilda

Chemistry
MgCl2 (aq) → Mg+2(s) + 2Cl-(g) are the states right? or would Mg+2 be a (g). Note: MgCl2 is very soluble. thanks
Thursday, September 15, 2016 by Sherry

Chemistry
When coal is mined, it is tested for how much heat it can produce when it burns. A 1.245g sample of coal was placed into a calorimeter containing 2000.0 mLs of water at 17.5 degrees Celsius. After the coal was combusted in the calorimeter, the water's temperature was found...
Thursday, September 15, 2016 by A. Pool

Chemistry
The toxic metal cadmium Cd2+ has a tendency to complex with as many as 4 Cl- ions. The complexation reactions can be written as: Cd2+ + Cl- ---> CdCl+ ``````` log Kf,1 = 1.98 Cd2+ + 2Cl- ---> CdCl20 `````` log Kf,2 =2.60 Cd2+ + 3Cl- ---> CdCl3- `````` log Kf,3 = 2.40 ...
Thursday, September 15, 2016 by Will

Chemistry G.12
(a) Which of the properties, crystal lattice energy and hydration energy, reduces the solubility of an ionic compound? (b) Which property, when increased, increases the solubility? I was thinking for (a) that it would be crystal lattice energy and for (b) hydration... Im not ...
Thursday, September 15, 2016 by Sherry

Chemistry
If 0.250 L of aqueous solution with a density of 1.00 g/mL contains 13.7 g of pesticide, express the concentration of pesticide in (a) ppm and (b) ppb.
Thursday, September 15, 2016 by MONICA

CHEMISTRY
BALANCE THE REDOX REACTION USING HALF CELL METHOD IN AN ACIDIC MEDIUM CHCl3 + MnO4- = Cl2 + CO2 + Mn+2
Thursday, September 15, 2016 by Maria

Chemistry
Half reaction method of balancing redox reaction CHCl3 + MnO4- = Cl2 + CO2 + Mn+2
Thursday, September 15, 2016 by Maria

ap chemistry
Which of the following statements about the pH scale is not true? A. In a pH expression, the hydronium ions, H3O+, can be abbreviated simply as H+. B. A solution with a pH of 4 has twice the [H+] of a solution with a pH of 2. C. The pH scale is based on a scale involving ...
Thursday, September 15, 2016 by jessie

ap chemistry
When are more products of a reaction available initially than at equilibrium? A. K = 0 B. Q < K C. Q = K D. Q > K
Thursday, September 15, 2016 by jessie

chemistry -3.2.4
Given the reaction: Cu2+(aq) + S2-(aq) CuS(s) What will happen (a) if CuSO4(aq) is added? And (b) if Na2SO4(aq) is added? A. (a) Nothing; (b) Less product will form B. (a) Less product will form; (b) Nothing C. (a) Nothing; (b) More product will form D. (a) More product will ...
Thursday, September 15, 2016 by erika

chemistry - 3.1.6
At a high temperature, the equilibrium constant for the decomposition of hydrogen iodide is 65.0. If the initial concentration of HI is 1.60 M, what is the concentration of hydrogen at equilibrium? 2Hl(g) H2(g) + I2(g) A. 1.42 M B. 0.753 M C. 0.240 M D. 0.802 M I'm ...
Thursday, September 15, 2016 by erika

Chemistry
A 0.2512 stock sample of HCl is tirade to equivalence . If 16.77ml of 0.1410 M NaOH is required to reach the equivalence point, what volume of stock HCl was used for the tritation?
Thursday, September 15, 2016 by Nicole

chemistry - 4.1.4
The [OH-] ion concentration of a sample is 1 × 10-10 M. What is the concentration of [H+] in the sample at 25°C? A. 1 × 10-14 M B. 1 × 10-4 M C. 1 × 10-10 M D. 1 × 10-6 M I think the answer is C. is this correct?
Thursday, September 15, 2016 by erika

chemistry
The problem is as follows: The toxic metal cadmium Cd2+ has a tendency to complex with as many as 4 Cl- ions. The complexation reactions can be written as: Cd2+ + Cl- ---> CdCl+ log Kf,1 = 1.98 Cd2+ + 2Cl- ---> CdCl2^0 log Kf,2 =2.60 Cd2+ + 3Cl- ---> CdCl3- log Kf,3...
Thursday, September 15, 2016 by Will

chemistry
What is a neutralization reaction? A. A reaction that involves neutral reactants B. A reaction in which the reactants are a salt and water C. A reaction in which the product is either acidic or basic D. A reaction that removes essentially all H+ and OH- I know that it isn'...
Thursday, September 15, 2016 by erika

chemistry
If the equilibrium constant is much less than 1, what can you conclude about the concentrations of the reactants and products? A. Reactants are in the numerator of the equilibrium expression, so the concentration of the reactants is high. B. Products are in the numerator of ...
Thursday, September 15, 2016 by erika

chemistry
How can you shift the equilibrium of the reaction between hydrogen and chlorine toward the products? H2(g) + Cl2(g) --> 2HCl(g) A. Add Cl2. B. Remove H2. C. Increase the pressure. D. Add HCl. would the answer to this one be to add Cl2? so answer A?
Thursday, September 15, 2016 by erika

chemistry
Given the reaction: Cu2+(aq) + S2-(aq) CuS(s) What will happen (a) if CuSO4(aq) is added? And (b) if Na2SO4(aq) is added? A. (a) Nothing; (b) Less product will form B. (a) Less product will form; (b) Nothing C. (a) Nothing; (b) More product will form D. (a) More product will ...
Thursday, September 15, 2016 by erika

chemistry
The equilibrium constant for the formation of phosphorus pentachloride is 1.9. If the partial pressure of each gas is 0.5 atm, will the reaction (as written) proceed forward or backward to reach equilibrium? PCl3(g) + Cl2(g) PCl5(g) A. Backward, because K is greater than Q B. ...
Thursday, September 15, 2016 by erika

chemistry
What effect does raising the temperature of the reaction chamber at a constant pressure have on the following reaction at equilibrium? 2NO2(g) N2O4(g) + heat A. The equilibrium shifts toward the reactants because the reverse reaction is endothermic. B. The concentration of NO2...
Thursday, September 15, 2016 by erika

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