a certain reaction has the following generaln form

72,211 results, page 49

Chem, help please

Consider the reaction N2 + 3H2 in equilibrium with 2 NH3 . At 25°C Ho = -92.22 kJ and So = -198.53 J/K. Using this information, calculate the equilibrium constant for the reaction at 226°C. (R = 8.314 J/K) Enter your answer using TWO significant figures. You may use ...

chemistry

The reaction of MnO4- with oxalic acid (H2C2O4) in aciic solutiob, yielding Mn2+ and CO2 gas, is widely used to determine the concentration of permanganate solutions. (a) write a balanced equation for the reaction would it be MnO4- + H2C2O4 --> Mn2C2O4 + H2O + O3-?????

Chemistry

In the SN2 mechanism, considering that the nucleophile attacks at the same time as the leaving group leaves, what would the effect of having a hindered (crowded) reaction center be on the rate of the reaction? Would you expect it to react slower or faster than an unhindered ...

college math/chemistry

chemical reaction: E + S <=> E~S <=> E-S <=> indicates a bidirectional reaction with different forward and backward rate constants. we can call these k1, k2, k3 and k4 in the above equation. Here, the enzyme binds to the substrate; the initial complex E~S ...

Pre algebra

Write the following ratio in simplest form 32 min : 36 min A 8:9******************* B 8:36 C 32:9 D 128:144 In a sports equipment locker there are 81 balls and 45 baseball mitts. Write the ratio of balls to baseball mitts in simplest form A 9:5***************** B 10:18 C 10:5 ...

chemstry

In a constant-pressure calorimeter, 50.0 mL of 0.340 M Ba(OH)2 was added to 50.0 mL of 0.680 M HCl. The reaction caused the temperature of the solution to rise from 23.69 °C to 28.32 °C. If the solution has the same density and specific heat as water, what is ÄH for this ...

Science

In a constant-pressure calorimeter, 70.0 mL of 0.330 M Ba(OH)2 was added to 70.0 mL of 0.660 M HCl. The reaction caused the temperature of the solution to rise from 21.27 °C to 25.77 °C. If the solution has the same density and specific heat as water, what is ÄH for this ...

Chemistry

In a constant-pressure calorimeter, 60.0 mL of 0.320 M Ba(OH)2 was added to 60.0 mL of 0.640 M HCl. The reaction caused the temperature of the solution to rise from 23.24 °C to 27.60 °C. If the solution has the same density and specific heat as water, what is ÄH for this ...

chemistry

In a constant-pressure calorimeter, 65.0 mL of 0.330 M Ba(OH)2 was added to 65.0 mL of 0.660 M HCl. The reaction caused the temperature of the solution to rise from 21.91 °C to 26.41 °C. If the solution has the same density and specific heat as water, what is ÄH for this ...

Chemistry

The following reaction is first order, C2H6==> 2CH3. If the rate constant is equal to 5.5 x 10-4 s^-1 at 1000 K, how long will it take for 0.35 mol of C2H6 in a 1.00 L container to decrease to 0.20 mol in the same container? Thank you very much

chemistry

Calcium carbonate reacts with hydrochloric acid according to the following reaction: CaCO3 (s) + 2 HCl (aq) --> CaCl2 (aq) + H2O (l) + CO2 (g) How many grams of calcium carbonate would be required to neutralize 50.0 cm3 of 8.00 M HCl?

Chemistry answers

HA(aq)+ H2O (l) <-> H3O+(aq)+ A¯ (aq) Given the reaction above, which of the following will cause an increase in the pH of an equilibrium mixture? Give all answers which apply. A) add KA B) add HA C) remove A¯ D) remove HA E) none of these will affect the pH. Answer A ...

Chemistry answers

HA(aq)+ H2O (l) <-> H3O+(aq)+ A¯ (aq) Given the reaction above, which of the following will cause an increase in the pH of an equilibrium mixture? Give all answers which apply. A) add KA B) add HA C) remove A¯ D) remove HA E) none of these will affect the pH. Answer A ...

chem

Determine the volume of 0.240 M KOH solution required to neutralize each of the following samples of sulfuric acid. The neutralization reaction is shown below. H2SO4(aq) + 2 KOH(aq)--> K2SO4(aq) + 2 H2O(l) (a) 26 mL of 0.240 M H2SO4 thanks

chemistry

Hi, I can't figure out how to start this one. I know I need to figure out the proportions or something of that sort. Any help is greatly appreciated Thanks! Calculate ƒ¢H for the reaction NO(g) + O(g) ¨ NO2(g) given the following: NO(g) + O3(g) ¨ NO2(g) + O2(g) ƒ¢H...

Chemistry

Calculate ∆Hºf /mol for propane, C3H8(g), given the following reaction: (10 points) C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(ℓ ); ∆Hºrxn = -2219.9 kJ

Chemistry

Which of the following is an oxidation-reduction (redox) reaction? A. 2K(s) + 2H2O(l) → 2KOH(aq) + H2(g) B. 2NaN3(g) → 2Na(g) + 3N2(g) C. 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g) D. Fe(s) + Ni(NO3)2(aq) → Fe(NO3)2(aq) + Ni(s) E. all of the above

Chemistry

If 10.5 g of hydrogen, H2, were mixed with 6.51 g of acetylene, C2H2, and allowed to react according to the following equation, what is the theoretical yield of ethane, C2H6, produced? If 7.00 g of ethane, C2H6, were recovered at the end of the reaction, what is the percent ...

ap chem

Bismuth can be electrolytically reduced according to the following reaction: BiO(+)+ 2H(+)+ 3e¯ >>> Bi + H2O How many grams of bismuth can be reduced by applying a 5.60 A current for 23.8 min. to a solution containing BiO+ ions (assuming 100% efficiency)?

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?

Chemistry

Write a balanced equation from the following statement: Zinc metal and sulfuric acid are combined to form hydrogen gas and zinc sulfate (Enter the formulas in the order they are listed. Do not leave a space between the coefficient and the formula)

Math

In the question I am working on, there are three jars filled with balls, and a die. Depending on the number that comes up from the die determines which jar a ball is drawn from. I created a tree and have all my individual probabilities. The question asks the probability of a ...

chemistry

Reaction: CaCO3 + 2 HCl -> CaCl2 + CO2 + H2O Calculate the molarity of hydrochloric acid solution if an initial mass of 4.568g of CaCO3 was reacted with 25.0mL of the acid and 2.678g of CaCO3 remain after the reaction is complete.

Chemistry

A 0.960mol quantity of Br2 is added to a 1.00 L reaction vessel that contains 1.23mol of H2 gas at 1000 K. What are the partial pressures of H2, Br2, and HBr at equilibrium? At 1000 K, Kp=2.1×106 and ΔH∘ = -101.7 kJ for the reaction H2(g)+Br2(g)⇌2HBr(g).

Chemistry

In the gas-phase reaction given below, the [I2] changes from 0.400 M at 0.00 min to 0.200 M at 3.00 min. I2 + Cl2 --> 2 ICl Calculate the average reaction rate in moles I2 consumed per liter per minute. mol/(L·min)

AP Chemistry

Tungsten(VI) oxide can be reduced to tungsten by heating it with carbo, as shown in the reaction: 2WO3(s) + 3C(s) <---> 2W(s) + 3CO2(g) If the original mass of WO3 is 37.0 g, how many grams of CO2 must be collected from the reaction in order to infer that the solid that ...

chemistry

True or False: 1. A rate law can be written from the molecularity of the slowest elementary step. 2.The final rate law can include intermediates. 3.The rate of a reaction is dependent of the fastest step in the mechanism. 4.A mechanism can never be proven to be the correct ...

Chemistry

2M +6HCl–>2MCl+3H2 Delta H= -638.0 Kj HClg—>HCl aq= Delta H -74.8 Kj H2+Cl2–>2HCl Delta H -1845.0 Kj MCl3s–> MCl3 aq Delta H -249.0 Kj Use the information above to determine the enthalpy of the following reaction. 2M +3Cl2–>2MCl3 Delta H =???

chemistry

The reaction A to products is first order in A. 1.) If 2.00 g A is allowed to decompose for 42 min, the mass of A remaining undecomposed is found to be 0.50 g. What is the half-life, t_{1/2}, of this reaction? 2.)Starting with 2.00 g A, what is the mass of A remaining ...

APCHEm urgent!!!!!!

Hi thank you so much!!!! What is a net ionic equation for the reaction of H+ with Cu(NH3)4 ^2+ ALSO what is the net ionic equation for the reaction of H+ with Hg2Cl2 Does the H+ addition increase, decrease, or has no impact on the solubility of the salt.?

chemistry

A 0.100 mol sample of H2S is placed in a 10.0 L reaction vessel and heated to 1132°C. At equilibrium, 0.0285 mol H2 is present. Calculate the value of Kc for the reaction below at 1132°C. 2 H2S(g) 2 H2(g) + S2(g)

chemistry

Write the overall ionic equation and the net ionic equation for the reaction between BaCl2 and Na2SO4 in aqueous solution, indentify the spectator ion and the precipitate ion for this reaction. help :(

chemistry

A reaction has a rate law, rate = kA]B]^2 What is the overall order of the reaction? a. 2 b. 3 c. 0 d. 1 e. 4 chemistry - DrBob222, Friday, February 17, 2012 at 10:53pm The overall is the sum of the orders of each component. still don't get it but guessing A

chemistry

What is the purpose of a calorimeter? A. To determine the temperature of a chemical reaction B. To determine the energy changes of a chemical reaction C. To identify the specific temperature of an unknown substance I think the answer might be c

chemistry

for the reaction A + B C the concentrations of AB, and C are 0.2M, 0.4M and0.)M respectively at 0 minutes. After 30 minutes the concentrations of A and B drop to ).080mM and 0.280M respectively, while the concentration of C rises to 0.120M. Calculate the rate of this reaction.

chemistry

A chemist determined by measurements that 0.0850 moles of mercury participated in a chemical reaction. Calculate the mass of mercury that participated in the chemical reaction. Round your answer to 3 significant digits.

chemistry

Which of the following is the formation reaction for CaO(s) ? can you check my answer(the one that has star next to it) A. Ca(s) + 1/2O2(g)= CaO(s). B. CaO(s)= Ca(s) + 1/2O2(g) C. Ca2+(aq) + O2–(aq)= CaO(s) D. 2 Ca(s) + O2(g)= 2CaO(s) (*) E. 2 CaO(s)= 2 Ca(s) + O2(g)

chemistry

the fuel methanol(CH3OH) is made by the reaction of carbon monoxide and hydrogen. a) write the balanced chemical reaction b)how many grams og hydrogen are needed to produce 45.0 grams of methanol?

Another caffeine from tea question

Can anyone show me the reaction of sodium carbonate with water to produce bicarbonate and hydroxide as sodium carbonate dissolves? And if any, what is the reaction of tannins and caffeine with this solution? Thanks loads!

OChem

Could someone explain these two reaction mechanisms (I know they are substitution): 1) 1-propanol reacted with H2SO4 and NaBr 2) 2-pentanol reacted with H2SO4 and NaBr does the carbocation rearrange for the second reaction? thanks for the help!

Science

Why do reaction times(reflexes) differ from person to person? Wny does your reaction time improve when the same thing is done over and over again. ( slap in face 10 times)

Science

Why do reaction times(reflexes) differ from person to person? Wny does your reaction time improve when the same thing is done over and over again. ( slap in face 10 times)

chemistry

Calculate the value of the equilibrium constant (Kp) for the reaction shown, if F(g) was found to be 96.80 % decomposed at 1000 K when its initial pressure was 4.638 atm. The initial pressure of the reaction products is 0 atm. 2F(g) = F2(g)

Chemistry

A 5.00L reaction vessel is filled with 1.00mol of H2, 1.00mol of I2, and 2.50mol of HI. If equilibrium constant for the reaction is 129 at 500k, what are the equilibrium concentrations of all species? H2(g) + I2(g) <-> 2HI(g) Kc = 129

Chemistry

20.00mL of 0.55M CH3COOH solution is mixed with 9.95mL of 1.0M NaHCO3 solution. The reaction occurring is CH3COOH + NaHCO3 --> CH3CHOO + Na + H2O +CO2. Which is the limiting reagent in this reaction?

psychology

Ryan,an avoid football enthusiast,and his mother,who is much less familiar with the game are watching their favorite college team attempt to scoreWhich of the following conclusions is most likely? a)The positons of the players form 11 chunks in both Ryan's and his mother's STM...

psychology

Ryan,an avid football enthusiast,and his mother,who is much less familiar with the game are watching their favorite college team attempt to scoreWhich of the following conclusions is most likely? a)The positons of the players form 11 chunks in both Ryan's and his mother's STM ...

stats

suppose you are to form a scatterplot oby collecting data for the given pair of variables. determine the likely direction form and strngth. Student: high grade point average, student: studying consistency

chemisry

Two half cells in a galvanic cell consist of one iron electroide in a solution of iron sulphate and a silver electrode in a silver nitrate solution a) Assume that the cell is operating as a galvanic cell. State the oxidation half reaction, the reduction half reaction and the ...

Chemistry - Stoichiometry

Elements X and fluorine react to form two different compounds. In the first reaction 0.480g of X reacts with 1.000g of F. In the second, 0.960g of X reacts with 1.000g of F. Which are possible formulas for the two compunds First Compound Second Compound a)XF X2F2 b)XF2 XF c)...

chemistry

Which of the answer choices correctly defines reaction rate? the amount of reactants used in a specific type of reaction the amount of products produced in a specific type of reaction the speed at which reactants change to products over a given time the speed at which products...

chemistry

What volume (in Liters) of hydrogen must react to form 17.0L of ammonia according to the following balanced equation: N2(g) + 3H2(g) --> 2NH3(g) Ratio from equation is H : NH3 = 3 : 2 = 3/2 : 1 = 17x3/2 : 17 = 25.5 : 17 17 L of hydrogen can you check my work is this right?

chemistry

Which of the following pairs can be used to prepare a buffer? (select all that can apply) a. HCl/NaCl b. HF/KF c. NH3/NH4Cl d. HNO3/HNO2 e. NaNO2/HNO3 can you also please explain how they form a buffer? thank you

Chemistry

2 NO(g) + O2 (g) <==> 2 NO2 (g) Given that Kp=7.96×1012 for the reaction above and the following starting conditions: Initial Concentrations p(NO)=0.775 atm p(NO2)=0.000 atm p(O2)=0.789 atm Determine the equilibrium concentration of NO2.

chemistry

Silver chloride can be prepared by the reaction of 100mL of 0.20M silver nitrate with 100mL of 0.15M calcium chloride. after the reaction goes to completion, what concentration of which ion remains in solution?

chem

If the initial pressure of HD(g) is 2.270 atm, calculate the % decomposition of HD(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kp at 727.0 °C is 0.26. The initial pressure of the reaction products is 0 atm. 2HD(g) = H2(g)+D2(g)

Chemistry(Please help, thank you!)

Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 10-3 NO2(g) == NO(g) + ½ O2(g) Kc = 3.93 calculate a value for Kc for the reaction, NOCl (g) + ½ O2 (g) == NO2 (g) + ½ Cl2 (g) I do not understnad how I am suppose to use the Kc values given if they give you a new ...

Chemistry

Calculate the value of the equilibrium constant (Kc) for the reaction shown, if NO2(g) was found to be 95.54 % decomposed at 45.00 °C when its initial concentration was 5.725 mol/L. The initial concentration of the reaction products is 0 mol/L. 2NO2(g) = N2O4(g)

Chemistry

You have a reaction using the following criteria: 1.3456 g of barium chloride solution (0.786M) is mixed with 1.20089 g of sodium sulfate solution (1.3M). The ambient pressure is 754.564 mmHg and the temperature is 56.889 degrees celsius. Determine the volume of the gas produced.

Chemistry

Consider the following reaction in water: P4 (s) + 6 H2O (l) → 2 PH3 (g) + 2 H3PO3 (aq) If you allow 23.42 g of P4 to react what would be the pressure that the dry gas would exert on a 15.00 mL container at STP. Assume all of the phosphorus reacted. This can be solved by...

Chemistry

1) What volume of oxygen gas at 28 Celsius and 102 kPa is needed to react completely with 150 g of iron according to the following reaction. Fe(s) + O2 (g) FeO(s) 2) A bunsen burner is lit in a lab that at 24.7 Celcius and 1.07 atm. What mass of water is produced in the ...

Chemistry

Hydrogen iodide decomposition via a second-order process to produce hydrogen and iodine according to the following chemical equation: 2 HI(g) -> H2 (g) + I2 (g) If it takes 489 seconds for the initial concentration of HI to decrease from 0.0693 M to 0.0174 M, what is the ...

Chemistry

In a combination reaction, 2.22 g of Magnesium is heated with 3.75 g of Nitrogen a) which reactant is present in excess? b) how many moles of product are formed? c) after reaction, how many grams of each reactant and product are present?

Chemistry

Na (s) + 1/2F2 (g) = 2NaF (s) Are the reactants at higher or lower energy than the products and is the reaction endothermic or exothermic? I feel that the reaction is exothermic, but can't determine higher or lower enery?

HELP-CHEMISTRY!

Na (s) + 1/2F2 (g) = 2NaF (s) Are the reactants at higher or lower energy than the products and is the reaction endothermic or exothermic? I feel that the reaction is exothermic, but can't determine higher or lower enery?

Chemistry

The reaction of 1 Mol of iron metal with 3 Mol aqueous HCI produces 1.5 mol H2 gas, 1 mol aqueous FeCI3, and 87.9 kj of heat. Write a thermochemical equation for this reaction

chemistry

Consider the following double displacement reactions. For each reaction, complete and balance the equation and give the net ionic equation. NH4Cl(aq)+Ca(NO3)2(aq) -> NH4(NO3)2+CaCl the second half of the equation is what I had done but I think its not right...

chemistry

Manganese(III) fluoride, MnF3, can be prepared by the following reaction: 2MnI2(s) + 13F2(g) → 2MnF3(s) + 4IF5(l) If the percentage yield of MnF3 is always approximately 51%, how many grams of MnF3 can be expected if 40.0 grams of each reactant is used in an experiment?

Chemistry

What is the value of the equilibrium constant at 25°C for the reaction between each of the following? (a) Sn(s) and Pb2+(aq) (b) Cr(s) and Cu2+(aq) I have been unable to get either and have spent the last two hours attempting it. I have been using the equation K = 10^(nEcell...

Pre Cal.

Express 5sqrt(3) - 5i in polar form. A: 10(cos(11pi/6) + i sin(11pi/6)) Express 4(cos(3pi/4) + i sin(3pi/4)) in rectangular form. A: -2sqrt(2) + 2sqrt(2i Write 2x+y=5 in polar form. A: sqrt(5)= r cos (theta-27degrees) Are these correct?

ChemistryDrBob222

Arrows disappeared from below added them back to the equations. ??(a) I don't understand ln(No/N)=akt The decomposition of IBr(g)into I2 (g) and Br2 (g) is first order in IBr with k = 0.00255/sec. (a)Starting with [IBr] = 1.50M, what will [IBr] become after 2.50 minutes? (b)...

Ionic compounds Scinece

3. What happens to the change on individual ions when they form ions? 11. Write the names of the two ions in each of the following compounds. (C) Na2O (E) Na3PO4 (G) NH4OH (H) Ca (NO3)2 8. Use the tables of metals, non-metals, and polyatomic ions and the Periodic table to name...

science

If a reaction rate increases with temperature, how will the rate constant of the reaction change with temperature? A. The rate constant only changes upon addition of a catalyst to the reaction. B. The rate constant will decrease with temperature. C. The rate constant will not ...

chem

If a reaction rate increases with temperature, how will the rate constant of the reaction change with temperature? A. The rate constant only changes upon addition of a catalyst to the reaction. B. The rate constant will decrease with temperature. C. The rate constant will not ...

chemistry

the reaction contains initially 5 moles of CO and 2 moles of H2O.the volume is 1 litre.but at equilibrium it is 0.5 moles of h2o .then value of Kc for reaction is.

Math

find an equation for a plane parallel to the xy-plane; does not pass through the origin. (I know how you would find the equation if it says passes through a certain point. But I'm confused how to do it if it says does not pass through certain point)

physics

The load-bearing piston in a certain hydraulic system has an area 20 times as large as the input piston. If the larger piston supports a load of 2000N, how large a force must be applied to the input piston? A certain boat displaces a volume of 4.5m3 of water (the density of ...

chemistry

It took 20 seconds for a certain volume of oxygen to effuse through an orifice(small opening) at 298K. How long will it take the same volume of each of the following gases to effuse through the same orifice at the same temperature?. The gases are hydrogen, helium, and chlorine...

Chem

Using general solubility rules, write the balanced molecular equation when the following aq solutions are mixed. Underline the formula of the solid. If no precipitation reaction is likely, explain why. A. NHY4Cl, H2SO4 B. K2CO3, SnCl4 C. NH4Cl, Pb(NO3)2 D. CuSO4, KOH E.Na3PO4...

Biology (alert!)

Which sentence do you think does not agree with the true facts of coral reefs? 1. Off shore coral reefs are the cause of terrible storms in coastal communities. 2. Coral reefs form when the shells of thousands of corals join. 3. Sponges gives out chemicals that harden around ...

college chemistry

If the initial concentration of F(g) is 8.285 mol/L, calculate the % decomposition of F(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kc at 927.0 °C is 370.00. The initial concentration of the reaction products is 0 mol/L. 2F(g) = ...

chemisrty

Q5) The reaction for the combustion of propane is as follows: C3H8 + 5O2 ---->>3CO2 + 4H2O 1. If 20.0 g of C3H8 and 20.0 g of O2 are reacted, which is the limiting reactant? 2. How many grams of H2O can be produced? 3. How many grams of the excess reactant remains at the...

chem

3. Given a chemical reaction and H associated with the reaction: stoichiometry and limiting reactant problem involving gases. Why would we need delta H for a stoichimetry or limiting reactant problem? And can i get an example pleasE?

General Chemisty

2. Calculate the value of the equilibrium constant (Kc) for the reaction shown, if NO2(g) was found to be 95.54 % decomposed at 45.00 °C when its initial concentration was 5.725 mol/L. The initial concentration of the reaction products is 0 mol/L. 2NO2(g) = N2O4(g)

chem

The reaction is Br2 (g) <---> 2Br (g). It occurs at T = 1600 C. When 1.05 mol Br2 are placed in a 2 Liter flask, 2.50% of Br2 undergoes dissociation. Calculate the Kp for the reaction. Okay so i did the ICE table for this, Br2 (g) <---> 2Br (g) I : 1.05/2 ..... 0 C...

Chemistry

If you try to carry out a double displacement reaction by mixing together equal volumes of a solution that contains dissolved NaF and a solution that contains dissolved NaCl. Would you expect a reaction? Why or why not?

chem expirement!

You are required to design an experiment to test Hess's law using the combustion of ethanol. Write a brief design for this experiment. What I wrote as my answer: Hess’ Law: is the algebraic addition of chemical equations yields a net equation whose enthalpy of reaction is ...

Chemistry

At 700 K, the equilibrium constant for the reaction NO2(g) « 2NO(g) + O2(g) is Kc = 4.79×10-3 (M), and the rate constant for the reaction 2NO(g) + O2(g) ® NO2(g) is k = 3.13×10^3 M^-2s^-1. What is the rate constant for the reaction NO2(g) ® 2NO(g) + O2(g) at this ...

Biology

Would someone be kind enough to check the following paragraph for me, I need to complete it by adding the appropriate words from the following list, Cell walls, mitochondria, nucleus, DNA, eukaryotes, protoctists, endosymbiosis, organelle, membranes, diversity, bacteria, ...

chemistry

I got E) for the first and couldn't figure out the other one. Can any one verify the first and help with the second?? In which of the following processes is there a decrease in the potential energy of the substances involved? A) a coil spring is compressed B) two particles of ...

sita college

It took 20 seconds for a certain volume of oxygen to effuse through an orifice(small opening) at 298K. How long will it take the same volume of each of the following gases to effuse through the same orifice at the same temperature?. The gases are hydrogen, helium, and chlorine...

Chemisty.....Help =))

What is the molarity of ZnCl2 that forms when 30.0g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 285 mL . (please explain step by step I have no clue!) Zn(s) + CuCl2(aq) --> ZnCl2(aq)+ Cu(s)

Chemistry check answers

HA(aq)+ H2O (l) <-> H3O+(aq)+ A¯ (aq) Given the reaction above, which of the following will cause an increase in the pH of an equilibrium mixture? Give all answers which apply. A) add KA B) add HA C) remove A¯ D) remove HA E) none of these will affect the pH. Answer A ...

chemistry

Given the following thermochemical data: H2O(l)+2AgNO3(aq) ¡æ 2HNO3(aq)+Ag2O(s) ¥ÄH = 44.8 kJ 2Ag(s)+¨öO2(g) ¡æ Ag2O(s) ¥ÄH = -31.0 kJ ¨öO2(g)+H2(g) ¡æ H2O(l) ¥ÄH = -285.8 kJ Use Hess¡¯s Law to determine ¥ÄH for the reaction: ¨öH2(g)+AgNO3(aq) ¡æ Ag(s)+...

Chemistry Equation(again!)

Posted by chrissy on Saturday, January 6, 2007 at 1:23pm. In a lab expirement you add copper(II)nitrate to pure zinc. Write a balanced equation for this expirement and predict if a reaction will occur. For Further Reading Chemistry Equation - DrBob222, Saturday, January 6, ...

Chem

This is the problem: In a 1-L beaker, 203 ml of 0.307 M ammonium chromate was mixed with 137 ml of 0.269 M chromium (III) nitrite to produce ammonium nitrite and chromium (III) chromate. Write the balanced chemical reaction occuring here. If the percent yield of the reaction ...

Chemistry Dr. BOB

I don't get it!! In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and enthanol are "burned" to water vapor andCO2. Write a combustion reaction for ethanol. I need help with balancing the equation i ...

chem. question?+asap!!!!!

For the reaction, state if the reaction is quantitative, or, if not, state whether products or reactants are favoured at equilibrium. 1. 100 mL of 0.1 mol/L nitric acid reacts with 100 mL of 0.1 mol/L ammonium hydrogen carbonate My question is how do I know if it is quantitive...

Ms. Sue PLZ HELP!!!(Civics)

"Four score and seven years ago our fathers brought forth on this continent, a new nation, continent in Liberty, and dedicated to the preposition that all men are created equal." -Abraham Lincoln With which of the following statements is the author of the quote most likely to ...

chemistry

When 0.627 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 102C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. The molar heat of reaction, H rxn, for the reaction of ...

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