
A mixture of 2.5 moles of H2O and 100 g of C are placed in a 50.0 L container and allowed to come to equilibrium in the following reaction: C(s) + H2O(g) CO(g) + H2(g) The equilibrium concentration of hydrogen gas is found to be 0.040 M.

DrBobb22 Calcule the concentrations of Cd^+2 , [Cd(CN)4^2] and CN^ at equilibrium, when 0.42 moles of Cd(NO3)2 dissolves in 1 L of 2.50 M NaCN Kf for Cd(CN)4^2 Help!

At 450oC the value of equilibrium constant for the following system is 6.59 x 103. If [NH3] = 1.23 x 104 and [H2] = 2.75 x 103 at equilibrium, determine the concentration of N2 at that point. N2(g) + 3H2(g) 2NH3(g)

2H2S(g)2H2(g) + S2 delta H=220KJ k eq is 0.40 a 10.0L vessel containing 2.0 mol of H2S, 2.2 mol of H2, and 2.5 mol of S2 Calculate a trail k eq value to see whether the reaction is at equilibrium. trail k eq =(h2)^2(S2)/(H2S)^2 = (0.22)^2(0.25)/(0.2)^2

2H2S(g)2H2(g) + S2 delta H=220KJ k eq is 0.40 a 10.0L vessel containing 2.0 mol of H2S, 2.2 mol of H2, and 2.5 mol of S2 Calculate a trail k eq value to see whether the reaction is at equilibrium. trail k eq =(h2)^2(S2)/(H2S)^2 = (0.22)^2(0.25)/(0.2)^2


For the reaction, 2 SO2(g) + O2(g) == 2 SO3(g), at 450.0 K (Kelvin) the equilibrium constant, Kc, has a value of 4.62. A system was charged to give these initial concentrations, (SO3) = 0.254 M and (O2) = 0.00855 M, and (SO2) = 0.500 M. In which direction

1. The functions of the respiratory system are (select all that apply) A. to pump blood to your body B. to deliver oxygen to the body C. to remove carbon dioxide from the body D. to absorb nutrients 2. The domeshaped muscle that lies below the lungs and

At high temperature, 0.500 mol of HBR was placed in a 1.00L container where it decomposed to give the equilibrium: 2HBr <==> H2 + Br2 At equilibrium, the [Br2] is 0.0855 mol/L. What is the value of the equilibrium constant? My work: ..2HBr <==>

A voltaic cell consists of a Pb/Pb2+ halfcell and a Cu/Cu2+ halfcell at 25 C. The initial concentrations of Pb+2 and Cu+2 are 0.0500 M and 1.50 M, respectively. A. What is the initial cell potential? B. What is the cell potential when the concentration

Why must a balanced chemical equation be used when determining Keq?

Why must a balanced chemical equation be used when determining Keq?

In 1992, the life expectancy of males in a certain country was 73.5 years. In 1996, it was 75.7 years. Let E representthe life expectancy in yeart and let t represent number of years since 1992. Fill in the linear function E(t) that fits the data

In 1992, the life expectancy of males in a certain country was 73.5 years. In 1996, it was 75.7 years. Let E representthe life expectancy in yeart and let t represent number of years since 1992. Fill in the linear function E(t) that fits the data

1.00 mol of N2O4 and 1.00 mol of NO2 are placed in an 800 mL container. Calculate the initial concentrations of each gas. N2O4= 1.25 mol/L NO2=1.25 mol/L When equilibrium is reached, the concentration of NO2 increases by 0.50mol/L. Calculate the

getting ready to turn this in just want to check my answers any takers?? 1. In an atom, electrons ____. (1 point) are located in the nucleus are paired with neutrons are located in the electron cloud are always in the same place 2. The maximum number of


Keq for the reaction 2HI <> H2 +I2 has a value of 1.85x 10^2 at 425 degrees celsius. If 0.18 mol of HI is placed in a 2.0 L flask and allowed to come to equilibrium at this temperature. What will the equilibrium of [I2} be?

Manana, ____ , voy de compras muy temprano con mi tia y mi hermano menor de 12 anos. A mi hermano mayor, Ernesto, no le gusta ir de compras. English: Tomorrow, ____, I'm going shopping very early with my aunt and my younger brother of 12 years old. What

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).

1. Scientists hypothesize that the sun formed ____. (1 point) less than a billion years ago from a cloud of gas and dust less than a million years ago from a chunk of Jupiter 2. Two of the inner planets are ____. (1 point) Venus and Saturn Mars and Venus

Okay, I feel like this question should be really easy because it's a multiple choice question but how do you figure it out?? I'm completely drawing a blank. Consider the following equilibrium N2O4(g) <> 2NO2(g) Kc = 4.8E3 Which set of

I only have two questions, thank you! One difference between a point mutation and a chromosomal mutation is that ____ A. A point mutation affects the DNA of more genes than a chromosomal mutation B. A point mutation can involve a insertion or deletion, but

over time _____ has gained power at the expense of ____.

w^2 ____ w^0 or w^2/w0 Simplify. Answer as a power with a positive exponent

Zinc, copper, lead, and mercury ions are toxic to Atlantic salmon at concentrations of 6.42 times 10 to the 2 mM, 7.16 times 10 to the 3 mM, 0.965 mM, and 5.00 times 10 to the 2 mM, respectively. What are the corresponding concentration is milligrams

The value of Keq for the equilibrium H2 (g) + I2 (g) ↔ 2 HI (g) is 794 at 25 °C. What is the value of Keq for the equilibrium below? 1/2 H2 (g) + 1/2 I2 (g) ↔ HI (g)


I am supposed to fill in the blanks without a word bank. 1. I you push a crate with 40 N of force at an angle of 30 degrees and your friend pushes with a force of 40 N horizontally, the amount of work you are doing is _____ the amount of work your friend

Bromine gas is allowed to reach equilibrium according to the equation. Br2=2Br Kc=0.0011 at 1280°C Initial concentration of br2 is 0.063M and Br is 0.012M. How to calculate the concentration of these species at equilibrium. Please help me .

At a certain temperature, the equilibrium constant Kc is 0.154 for the reaction 2SO2(g) + O2(g)<> 2SO3(g) What concentration of SO3 would be in equilibrium with 0.250 moles of SO2 and 0.885 moles of O2 in a 1.00 liter container at this temperature?

The compound NOCl decomposes to nitric oxide and chlorine according to the following equation: 2 NOCl (g) → 2 NO (g) + Cl2 (g) Suppose that 0.550 mol NOCl is placed in a 2.00L flask at a given temperature. When equilibrium has been established, it is

I'm actually in 7th grade, but I'm doing 8th grade prealgebra, but anyway, here: I'm supposed to simplify these four problems and I don't really understand how: 28s (15 power) ____ 42s (12 power) 4m+(n[7th power]m) 63m(5 power)n(6 power)

You want to make 1000 ml of an 0.1 M HA buffer so that the pH=pKa of HA. To make this buffer you need to add ____ HA and ____ mL of 1M NaOH and then add enough water to give 1000 mL. HA is a weak acid.

can someone help and explain these to me? AngleWXZ and Angle ZXY is complementary the measure of AngleWXY=3x+3 a.)measure of angle=______ =measure of angle WXZ+the measure of AngleZXY(Angle Addition Postulate) b.) measure of AngleWXZ+ the measure of

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.

Calculate the concentrations of Cd2 +, [Cd (CN) 42] and CN at equilibrium when they dissolve 0, 42mol of Cd(NO3)2, molarity= 2.50 M Kf =7.1x10^16

What can you conclude about the relative equilibrium concentrations of CrO4 ion in each of the solutions 0.1M K2Cr2O7 and 0.1M K2CrO4?


DrBobb22 Calcule the concentrations of Cd^+2 , [Cd(CN)4^2] and CN^ at equilibrium, when 0.42 moles of Cd(NO3)2 dissolves in 1 L of 2.50 M NaCN Kf for Cd(CN)4^2 is 7.1x10^16

what are the equilibrium concentrations of Pb2+ and F in a saturated solution of lead (II)flouride if the Ksp for PbF2 is 3.2*10^8?

5.Like so many other young people he has been ___ into the false belief that there is an easy way to success delude 8.At the time it occured that mistake didn't seem to be too important but it had ____that still hurt me today consequence 11.We must ____ a

A voltaic cell consists of a Pb/Pb2+ halfcell and a Cu/Cu2+ halfcell at 25 C. The initial concentrations of Pb+2 and Cu+2 are 0.0500 M and 1.50 M, respectively. A. What is the initial cell potential? B. What is the cell potential when the concentration

If cell depolarises at +50mV, what are the concentrations of K+? I am really confused how to use the nernst equation to get the concentrations. If I set up 58 [Kout]/[Kin] = 50, will that be right? I am not sure how to start this problem.

Word box : eukaryote, prokaryote, cytoplasm, cell membrane, semipermeable, cytoskeleton, endoplasmic reticulum, ribosomes, Golgi apparatus, vesicle 1. ______ are the site of protein synthesis Ribosomes? 2. When DNA is not surrounded by nuclear membrane the

A department store is offering a coupon for 26% off for any purchases over $100. How much would you spend for a $100 purchase? You would spend $____. Construct a formula a piecewise functiom for the actual cost, C, of the purchase as a function of the

Evaluate the following limits. lim as x approaches infinity 6/e^x + 7=____? lim as x approaches negative infinity 6/e^x+7=____?

A 0.25 mol sample of n204 dissociates and comes to equilibrium in a 1.5 L flask at 100 degrees C. The reaction is N2O4 > 2 NO2. The Kc at 100 degrees C is 0.36. What are the equilibrium concentrations of NO2 and N2O4?

For the formation of ammonia, the equilibrium constant is known to be 5.2 × 10−5 at 25◦C. After analysis, it is determined that [N2] = 3.1 M and [H2] = 0.8 M, both at equilibrium. How many grams of ammonia are in the 10 L reaction vessel at


Assume that gaseous hydrogen iodide is synthesized from hydrogen gas and iodide vapor at 50 degrees celcius where the equilibrium constant is 1.00 x 10^2. Suppose HI at 5.00 10^1 M, H2 at 1.00 x 10^2 M, and I2 at 5.00 x 10^3 M are mixed in a 5.0 L

1. Which of the following compounds is an unsaturated hydrocarbon? methane *propyne nonane methyl 2. The general name for hydrocarbons with at least one triple covalent bond is ____. alkenes alkyls alkanes *alkynes 3. What is the name of the smallest

Zinc, copper, lead, and mercury ions are toxic to Atlantic salmon at concentrations of 6.42 times 10 to the 2 mM, 7.16 times 10 to the 3 mM, 0.965 mM, and 5.00 times 10 to the 2 mM, respectively. What are the corresponding concentration is milligrams

Consider the following equilibrium at 1000K: 2SO2 (g) + O2 (g) ¡ê 2SO3 (g) A study of this system reveals that there are 3.5E3 moles of sulfur dioxide gas, and 4.8E3 moles of oxygen gas present in a 11.0L flask at equilibrium. The equilibrium constant

grit, meteoric, and parody is left The rock singer enjoyed a sudden ____ rise in popularity but his career faded just as quickly as it had blossomed meteoric Even though so many people were criticizing and ridiculing him he had the ____ to continue doing

factor down (4^3)^2 ____ * _____ ______ _______ ______*______ _____ ____ when is it not possible to work an exponent multipication? In the space below give an example and work it out to prove what you say does not work

Silver ion concentrations are needed for a solution. You have 0.050 M AgNO3, if you added 5.0mL of 12. M NH3 to 500.mL of this solution, how much silver ion in M will you have at equilibrium? [Kf for Ag(NH3)2+ is 1.5 x 10^7]

When perturbing the equilibrium with heating and cooling, how many times do you think the equilibrium can be shifted before it stops working? Why? How about modification of the equilibrium through changes in concentration?

K=1.6x10^5 mol/L for the following reaction 2NOCl(g).... 2 NO(g) + Cl2(g) Calculate the concentrations of all species at equilibrium for each of the following original mixtures E) 2.4 mol of NOCl, 2.4 mol of NO, and 1.2 mol Cl2 in a 1.0 L flask F)1.9

(x+1/2x1  x1/2x+1) * (2x1/x  2x1/x^2) (x+1/2x1  x1/2x+1)*(2x1/x  2x1/x^2) The first parenthesis reduces to zero. Check that. I have the answers in the back of my book (just not how to get there) the book shows the answer as 6(x1)/x(2x+1). When


For the reaction 2CO(g)+O2 《=》2CO2 with equilibrium constant Kc. Suppose the equation is rewritten as CO + 1/2O2 《=》CO2 with an equilibrium constant Kc'.what is the relationship between Kc and Kc'

For the reaction 2CO(g)+O2 《=》2CO2 with equilibrium constant Kc. Suppose the equation is rewritten as CO + 1/2O2 《=》CO2 with an equilibrium constant Kc'.what is the relationship between Kc and Kc'

1. ______ _____ _____ is computed by taking the sum of the absolute values of the individual forecast errors and dividing by the numbers of errors (n). 2.our job as quantitative analysts is to develop the best ____ ____ between the variable being forecast

Article I, Section 8 of the U.S. Constitution grants Congress the power to do all of the following EXCEPT ____.

If 1.00 mol each of carbon dioxide and hydrogen is initially injected into a 10.0L reaction chamber at 986 degrees Celsius, what would be the concentrations of each entity at equilibrium? CO2(g) + H2(g) „²„³ CO(g) + H2O(g) k = 1.60 for 986 degrees

1. The functions of the respiratory system are (select all that apply) A. to pump blood to your body B. to deliver oxygen to the body C. to remove carbon dioxide from the body D. to absorb nutrients 2. The domeshaped muscle that lies below the lungs and

If 8000 dollars is invested in a bank account at an interest rate of 10 per cent per year, find the amount in the bank after 11 years if interest is compounded annually ____ Find the amount in the bank after 11 years if interest is compounded quaterly ____

Hi, I have a question regarding the following chemical equilibrium equation: 2CrO4^2 + 2H3O^+ <> Cr2O7^2 + 3H2O The question is: how would you manipulate the above equation to produce more Cr2O7^2 ions without adding any Chromium based

One leg of a right triangle has a length of 5 m. The other sides have lengths that are consecutive integers. Find these lengths. The other leg is ____ m The length of the hypotenuse is ____ m Is my answer correct? The other leg is 12 m The hypotenuse is 13

100. mL of 0.020 M CaCl2(aq) is added to 200. mL of 0.20 M K2SO4(aq). Calculate the equilibrium concentrations of Ca^2+ (aq) and SO4^2(aq)


Calculate Ke for the following (equilibrium concentrations given below substances) H2(g)+Br2(g) yields 2HBr(g) + heat[.513] [.62] [.346] Thank you!

calculate Ke for the following (equilibrium concentrations given below substances) N2O4(g)+heat yields 2NO2(g) [.0325] [.022] Thank you!

A 0.500L vessel initially contains 0.0125 mol of H2S2 . Find the equilibrium concentrations of H2 and S2. Kc = 1.67 x 10^7 2 H2S <> 2 H2 + S2

Could someone explain the reasoning for this? 6) Which of the following is a false statement about ALL reactions in equilibrium? a) Increasing temperature shifts the reaction toward the products in an endothermic reaction b) Temperature effects on the

The reaction of CH4 in 2CH4(g) >/< C2H2(g) + 3 H2 (g) is carried out at a different temperature with an initial concentration of [CH4]=0.087M. At equilibrium, the concentration of H2 is 0.012 M. Find the equilibrium constant at this

I'm having trouble finding the answers to these fillintheblank questions: Our understanding of the solar system has changed from an Earthcentered model of ____ and ____ to the sun centered model of _____ and _____. I was thinking for the first 2

5 kids (A, B, C, D and E) are playing games in the playground. In each round, they follow the rules below to pass on the toy on their hands to the next kid: A→C, B→E, C→A, D→B, E→D. Initially, A and B are holding the car toy each while C, D and E

WHat is the accepted equilibrium constant for ferric thiocyanate [FeSCN2+]? I can't find a reliable number anywhere. Thanks in advance.

1. Which of the following compounds is an unsaturated hydrocarbon? methane *propyne nonane methyl 2. The general name for hydrocarbons with at least one triple covalent bond is ____. alkenes alkyls alkanes *alkynes 3. What is the name of the smallest

Hydrogen gas and iodine gas react via the equation, H2 + I2 <> 2HI, and K=76 at 600K. If 0.05 mole of HI is placed in a flask at 600K, what are the equilibrium concentrations of HI, I2, H2? I am very lost at where to even start with this problem


For the formation of ammonia, the equilibrium constant is known to be 5.2 × 10^−5 at 25◦C. After analysis, it is determined that [N2] =3M and [H2]=0.8M, both at equilibrium. How many grams of ammonia are in the 10L reaction vessel at

1. The perimeter of a rectangle is 126 m. The length is 6 m more than twice the width. Find the dimension. a. What is the length ____ m? b. What is the width ____ m? 2. Two angles are complementary. The sum of the measure of the first angle and half of the

A ____ is a substance that cannot be separated into similar substances by physical or mechanical methods such as filtering, boiling, or sifting. (I have to again write the answer)

Hi! Thanks for checking my question out! ____ 1. Methane, CH4, burns in oxygen gas to form water and carbon dioxide. What is the correct balanced chemical equation for this reaction? (1 point) a) CH4 + O > H2O + CO2 b) CH4 + 4O > 2H2O + CO2 c)

Write the balanced chemical equation for the equilibrium that is taking place between acetic acid and sodium acetate in the buffer solution.

PCL5=PCl3+Cl2 a. Initially 0.72 mole PCl5 are placed in 1.50 L flask. At equilibrium, there is 0.16 mole PCl3 in the flask. What is the equilibrium concentration of the PCl5? b. What is the equilibrium concentration of the Cl2? c.What is the equilibrium

The Lyman series. Of the four lines, 91.2nm, 97.2nm, 102.6 nm, and 121.6nm, which one has the A. Highest wavelength? _____ B. Highest energy? ______ C. Highest frequency?_(1)____ which equals__(2)____ My answers A. 91.2 B. 121.6 C. (1) 121.6 C. (2) energy

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

The hydrogen ion concentration of a substance is related to its acidity and basicity. Because hydrogen ion concentrations vary over a very wide range, logarithms are used to create a compressed pH scale, which is defined by pH=log(H+)where (H+)is the

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.


The judicial branch has the power to try criminal cases by ____ I don't have any options, and I am not sure.

Complete this table of initial and final concentrations HF(aq) + KOH(aq) <> KF(aq) + H20(l) Initial concentrations: HF2.0M KOH1.0M KF0M Final Concentrations? how do I set this up to figure out the final concentrations? How can I tell which of the

At a particular temp, K = 1.6 x 10^5 for the reaction: 2SO3(g) <> 2SO2(g) + O2 (g) If 4 mol of SO2 and 2 mol of O2 are placed into a 2.0L flask, calculate the equilibrium concentrations of all species. I set up an ICE table with SO3 to start with

The equilibrium constant for the equation 2 H2(g) + CO(g) CH3OH(g) Is 19 at a certain temperature. If there are 3.11 x 102 moles of H2 and 5.79 x 103 moles of CH3OH at equilibrium in a 6.75 L flask. What is the concentration of CO? What is the Kp at 1439

In 1991,the life expectancy of meals in a certain country was 69.8 years. In 1996, it was 72.7 years. Let E represent the life expectancy in year t represent years. E(t)= ____+ _____ Use the function to predict the life expecancy of maels in 2008 E(17)=

1. A solution of sodium oxalate has a pH of 7.82. The [OH] in mol/L must be which of the following: a) 6.18 b) 1.5 x 108 c) 6.6 x 107 d) 7.82 e) 7.82 2. When 0.93 mol of O2 and 0.56 mol of NH3 are mixed together and allowed to come to equilibrium

Calculate the relative concentrations of oethylbenzoic acid (pKa 3.79) and potassium oethylbenzoate that are needed to prepare a pH 4.0 buffer I know to set up hassle equation but when i get .21=log[a/ha] i get lost because i was not given

Factor completely 4v^2+14v =____ another problem is factor completely 4s^281= ____

when CO2 (.15mol) and H2 (.302g) in a 500L vessel at 576'C are allowed to come to equilibrium the mixture contains .000183 mol/L of H20. what is the equilibrium concentration of CO? CO2 + H2 > < CO +H2O The equilibrium concentration of H2O = the

A solution is prepared by mixing 50.0 mL of 0.17 M Pb(NO3)2 with 50.0 mL of 1.6 M KCl. Calculate the concentrations of Pb2+ and Cl  at equilibrium. Ksp for PbCl2(s) is 1.6X 105.


A solution is prepared by mixing 50.7 mL of 0.28 M Pb(NO3)2 with 70.8 mL of 1.0 M KCl. Calculate the concentrations of Pb2+ and Cl  at equilibrium. Ksp for PbCl2(s) is 1.6 105.

THE VALUE OF KC=6.2 AT 750K FOR THE REACTION CO+H20 <> CO2.IF INITIALLY THE QUANTITIES OF CO AND H2O ARE 2 MOLES IN 1L.WHAT COULD BE THE EQUILIBRIUM CONCENTRATIONS FOR ALL CHEMICALS?

For the reaction 2A(g) + B(aq) + 3C(l)<> D(s) + 3E(g), the concentrations at equilibrium are found to be: A: 2.3x10^3 Pa B: 1.8x10^2 M C: 15.8M D: 12.5M E: 5.6x10^4 Torr i got an answer of 1.83x10^13 is this correct??

Given the following data for a hypothetical reaction: M3+ (aq)+ L(aq) ⇋ [ML]2+(aq); calculate the equilibrium concentration of [ML]2+in the trial solution and Kc based on this single trial run of the equilibrium reaction. Standard solution data:

in the presence of NH3, Cu+2 forms the complex ion [Cu(NH3)4]+2. If the equilibrium concentrations of Cu+2 and [Cu(NH3)4]+2 are 1.8x10^17M and 1.0x10^3M respectively, in a 1.5 M NH3 solution, calculate the value for the overall formation constant of