a certain reaction has the following generaln form

73,810 results, page 35

statistics

he mean height of a certain kind of plant is 190 centimeters. Suppose we want to carry out a hypothesis test to see if the mean height when these plants are treated with a certain chemical differs from 190 . State the null hypothesis and the alternative hypothesis that we ...

Statistics

The mean height of a certain kind of plant is 185 centimeters. Suppose we want to carry out a hypothesis test to see if the mean height when these plants are treated with a certain chemical differs from 185. State the null hypothesis H0 and the alternative hypothesis H1 that ...

chemistry

What are the certain conditions when ionic compounds conduct an electric current? Why are ionic compounds not always used as conductors? Ionic compounds conduct an electric current when the ions are free to move about. This usally means they are in solution form (as ions) or ...

chemistry

What happens to the following reaction at equilibrium if the pressure is decreased? 2H"subtext"2(g) + O"subtext"2(g) 2H"subtext"2O(g)

chem

What mass of copper(II) nitrate would be produced from the complete reaction of 25.1 g of copper, according to the chemical reaction shown below? Cu + 2 AgNO3 ----> Cu(NO3)2 + 2 Ag

chemistry

What mass of copper(II) nitrate would be produced from the complete reaction of 25.1 g of copper, according to the chemical reaction shown below? Cu + 2 AgNO3 ----> Cu(NO3)2 + 2 Ag

Chemistry

A reaction has a standard free-energy change of -11.80 kJ/mol (-2.820 kcal/mol). Calculate the equilibrium constant for the reaction at 25 degrees C. Please help!

Chemistry

Consider the reaction below. 3 O2(g) --> 2 O3(g) At 175°C and a pressure of 128 torr, an equilibrium mixture of O2 and O3 has a density of 0.168 g/L. Calculate the Kp for the above reaction of 175°C

Chemistry

Consider the reaction below. 3 O2(g) --> 2 O3(g) At 175°C and a pressure of 128 torr, an equilibrium mixture of O2 and O3 has a density of 0.168 g/L. Calculate the Kp for the above reaction of 175°C

chemistry

What is the complete ionic equation for the double displacement reaction: CuNO3(aq) + K2S(aq)= what is the chemical name and formula of this chemical reaction? plsss. need help

chem

if a car produces 81g of {\rm CO_2}, how many grams of {\rm O_2} are used up in the reaction? the complete chem reaction is C2H6O+3O2--->2CO2+3H2O

chem

If it takes 84.2 min for the concentration of a reactant to drop to 20.0% of its initial value in a first-order reaction, what is the rate constant for the reaction in the units min-1?

chemistry

SO42- + HAsO2+ 2H+H3AsO4 + SO2 1. In the above reaction, the oxidation state of sulfur changes from (Answer) to (Answer) 2. How many electrons are transferred in the reaction?

chemistry

3PbO2 + 2Cr3++ 2H2O3Pb2+ + 2CrO42-+ 4H+ 1. In the above reaction, the oxidation state of chromium changes from (answer) to (answer). 2. How many electrons are transferred in the reaction?

chemistry

find mass of magnesium nitride produced in reaction of 5.0of magnesium with 10.0gof nitrogen. the reaction was carried out in a closed container

chemistry

From the enthalpies of reaction 2C(s)+O2(g)¨2CO(g)ƒ¢H=−221.0kJ 2C(s)+O2(g)+4H2(g)¨2CH3OH(g)ƒ¢H=−402.4kJ calculate ƒ¢H for the reaction CO(g)+2H2(g)¨CH3OH(g)

AP Chemistry

For the reaction cyclopropane(g) → propene(g) at 500◦C, a plot of ln[cyclopropane] vs t gives a straight line with a slope of −0.00067 s−1 . What is the order of this reaction and what is the rate constant?

Science

A reaction has a standard free-energy change of –11.70 kJ mol–1 (–2.796 kcal mol–1). Calculate the equilibrium constant for the reaction at 25 °C. Im so lost please help

Chemistry

Write the balanced chemical reaction (showing appropriate symbols and states) for the chemical reaction with enthalpy change equal to ΔHf° [NH3(g)]

medical staff management

i need help with the nurse midwife proctorship form: the direction are for the nurse midwife's proctorship form, list the procedures that will be reviewed by using privileges specific to the nurse midwife, that can be find at CNM's web site and in addition to the privileges, ...

Chemistry

Estimate the temperature where Delta G = 0 for the following reaction (Given: Delta H=-176 and Delta S = -284.5 J/K NH3 + HCl --> NH4Cl

medical billing

for medicaid cases there is no assignment of benefits unless the patient has other insurance in addition to medical. true or false 2. a two or three form that incorporates a bill, insurance form,and routing document used both computer and paper based system is called an ...

Math

1. Which of the following numbers are integers?11/3, 9.7, -163, -3/8, 1 A-1 AND -163? 2. Determine the maximum and minimum values of the following set of numbers. 3,-36/7, -1, -2/3, 5/4, -5, 26/9 a- MAX 3 MIN. -5? 3.Add -4/5+(-3/4)= -31/20? 4. ADD 11 +(-4)= 7? 5. ADD -3/5 + (8...

chemistry

Use the following information to identify element A and compound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of 659.452 g after it has been filled with nitrogen gas at a pressure of 790. torr and a temperature of 15°C. ...

chemistry

2 NO2(g) N2(g) + 2 O2(g) The ΔH° for the reaction above is -66.4 kJ. The system is initially at equilibrium. What happens if N2 is added to the reaction mixture at constant temperature and volume? The reaction absorbs energy. The reaction releases energy. [NO2] increases...

Chemistry

Find the enthalpy of combustion of magnesium using Hess' law given the following data (assume that exactly 100.0 mL of HCl was used in each trial and that HCl is in excess) Magnesium/HCl reaction: Grams of Mg= 0.244g Initial temp= 32.2 degrees celsius Final temp= 21.3 degrees ...

Social Studies

Can someone check my responses please? I want to make sure I'm correct before submitting. The * is my response 1. How does the Pledge of Allegiance to the flag of the United States reflect the concept of natural rights? A. The Pledge of Allegiance includes the phrase "under ...

Chemistry 101

Aluminum reacts with sulfur gas to form aluminum sulfide. Initially 1.18 ml of aluminum and 2.25mol of sulfur are combined. 1. write a balanced equation? 2. what is the limiting reaction? 3. what is the theoretical yield of aluminum sulfide in moles? How many moles of excess ...

Chemistry

Had a recent mix-up when I re-read my chemistry notes, and trying to clear things up properly; is this right?: When bonds form, energy is released, and so the reaction absorbs energy. I have two different things written... a bond breaking results in energy absorption, breaking...

chemistry

which of the following would form acidic,basic or neutral solutions:nh4f,nh4cn,nh4ch3coo,nh4cl,ba(ch3coo)2,nacn,caso4,cr(no3)3,fecl3,na2co3

Algebra

simplify the following expression and rewrite it in an equivalent form with positive exponents 24x^3y^-3/72x^-5y^-1 24*3*3*3/72*-5*-5*-5*-5*-5= This is how I have it started on my paper. my online book is down and im stuck. Thank you.

social studies

Information in long-term memory can be organized by all of the following EXCEPT: A)semantic category. B) spelling. C) sound and form. D) familiarity and relevance. Would it be D?

Chemistry

What volume (in ml) of carbon dioxide will form if 19.3 ml of O2 are reacted acccording to the following balanced equation: 2CO(g) + O2(g) --> 2CO2(g) Assume an excess of CO and that all are at the same temperature and pressure.

social studies

which of the following Nations has both the most stable democratic form of government and the highest standard of living? A.Israel B.Jordan C.Lebanon D.Syria my answer is D.

medical

Choose the combining form which best completes the following group: PONT/O, CRANI/O, FORAMIN/O, _______. A. COCHLE/O B. ENCEPHAL/O C. SALPING/O D. BLEPHAR/O plz help im lost

Chemistry

The equivalent weights of X and Y are _________ g/equiv. H+ and g/equiv. −OH , respectively, for the following reaction: Z X: benzoic acid Y: calcium hydroxide z: 2C6H5COOH + Ca(OH)2 → 2H2O + Ca(C6H5COO)2

Chemistry

Usng the following balanced chemical equation, determine the limiting reactant in the reaction between 3.0 grams of titanium and 8.0 grams of chlorine gas? Ti(s) + 2Cl2(g) --> TiCl4(s)

chemistry

Which one of the following is NOT a Lewis acid-base reaction? 1. ) Ca + S --> Ca2+ + S2- 2. ) BeF2 + 2 F- --> BeF42- 3. ) H+ + -O-H --> H-O-H 4. ) NH3 + BF3 --> H3N-BF3 i thought it was 1...but im not sure...but i know that 3 & 4 are definatly right.

Chemistry

Consider the following equilibrium: Mg(OH)2 (s) <--> Mg 2+ (aq) + 2OH-(aq) What happens to the amount of solid Mg(OH)2 when some HCl is added? It decreases because it has least entropy? So in the reaction, both the concentration of Mg(OH)2 and OH- decreases?

Chemistry

What is the activation energy for a simple A->B fist order type of reaction with the following rate constants at different temperatures? Temp rate constant (k) 310K 1.77 x 10-1s-1 480K 3.22 x 10^2s-1

chemistry

When 11.0 g of calcium metal is reacted with water, 5.00 g of calcium hydroxide is produced. Using the following balanced equation, calculate the percent yield for the reaction? Ca(s) + 2 H2O(l) → Ca(OH)2(aq) + H2(g) 84.0% 12.3% 45.5% 24.6%

chemistry

calculate the theoretical potential of each of the following cells.is the cell reaction spontaneous as written or spontaneous in the oppsite direction? Bi|BiO+(0.04M),H+(0.2M)||I-(0.1M),AgI(sat`d)|Ag help meeeee

chemistry

Which one of the following is not a redox reaction? PbO2(s) + Pb(s) + 2H2SO4(aq) 2PbSO4(s) + 2H2O(l) Ba(NO3)2(aq) + Na2CrO4(aq) BaCrO4(s) + 2NaNO3(aq) Zn(s) + 2MnO2(s) ZnO(s) + Mn2O3(s) 2H2O(g) 2H2(g) + O2(g)

chemistry

the following is a redox reaction. show which element(s) are oxidized and reduced. include how many total electrons are gained or lost by each element. 3HNO---->HNO3+H2O+2NO

Chemistry

Which of the following must be the same before and after a chemical reaction? Answer: The sum of the masses of all substances involved and the number of atoms of each type involved. WHY?

Chemistry

Using the following data 1. CU3+ + 2e- ---> Cu+ E1= 1.28V 2. CU2+ + e- ---> Cu+ E2= 0.15V 3. Cu2+ + 2e- ----> Cu(s) E3= 0.34V 3. Cu+ + e- ----> Cu (s) E4= 0.52V calculate the standard reduction potential for the reaction of Cu(III) to Cu(II). Is it .783 V?

Chemistry

Using the following data 1. CU3+ + 2e- ---> Cu+ E1= 1.28V 2. CU2+ + e- ---> Cu+ E2= 0.15V 3. Cu2+ + 2e- ----> Cu(s) E3= 0.34V 3. Cu+ + e- ----> Cu (s) E4= 0.52V calculate the standard reduction potential for the reaction of Cu(III) to Cu(II). Is it .783 V?

chemistry

Consider the following chemical reaction: 2 KNO3 (s) ------------> 2 KNO2 (s) + O2 (g) What volume, in liters, of O2 at 31.2oC and 2.045 atm pressure can be produced from the decomposition of 54.92 g of KNO3 (FM = 101.1 g/mol).

chemestry

Which of the following is the correct expression for the rate of the following reaction? Note: not all species are gaseous. CuO(s) + H2S (g) <--> Cu(s) + H2O (g) A. [Cu] x [H2O] / ([CuO] x [H2S]) B. [H2O] / [H2S] C. [CuO] x [H2S] / ([Cu] x [H2O]) D. None of these are ...

chemistry

Two liquids A and B on mixing form an ideal solution. The vapour pressure of the solution containing 2 moles of A and 4 moles of B is 0.2 atm. If the vapour pressure of pure A at a certain temperature is 0.3 atm then what will be the vapour pressure of pure B at that temperature?

Statistics

A VP of manufacturing claims that more than 3% of items produced using a certain assembly line are is defective. A random sample of 100 items from the assembly line had 4 defectives. At the 5% level of significance, which of the following would be part of the standardized ...

science

Experiments cannot validate hypotheses, only falsify them. The statement above can be restated in which of the following ways? A. Until disproved, an explanation for an observation is valid. B. Certain concepts cannot be subjected to direct experimentation. C. A hypothesis ...

Programming Logic

I need to create a program that has (at least) two variables, char and num. I need to use nested loops to print char, a character, in the form of the following pattern on as many lines and as many times as specified by num. For example, if char is “M” and num is 5, then ...

Programming Logic

I need to create a program that has (at least) two variables, char and num. I need to use nested loops to print char, a character, in the form of the following pattern on as many lines and as many times as specified by num. For example, if char is “M” and num is 5, then ...

English

1. He must have been rich. 2. I am sure he was rich. 3. I am sure that he was rich. 4. It is certain he was rich. 5. It is certain that he was rich. 6. Certainly he was rich. 7. Surely he was rich. (Are they all the same? Do we have to use 'that' or not?)

english

Which of the following topics relate directly to a work's authenticity? 1)believability of characters 2)the appeal of a certain guitar riff 3)sincerity expressed in a love song 4)the likely appeal to all teenagers 5)the way the setting matches the mood of the plot i put all of...

science

sorry to annoy anyone, but WHAT is the big idea of energy? i would really appreiciate a response In what context? Too much use. Not reneewable? Cost? availability? in the context of an ironsulphide reaction I still don't understand the question. explaining the iron/sulphur ...

chemistry help!!!!!

Consider the following reaction: Find the equilibrium partial pressures of A and B for each of the following different values of Kp. Assume that the initial partial pressure of B in each case is 1.0 atm, and that the initial partial pressure of A is 0.0 atm. Make any ...

Chemistry/Env Sci

a)the E0 for the reactions 2HOCl + 2H+ + 2e- → Cl2 + 2H20 and Cl2 + 2e- → Cl- are 1.63 and 1.396 volts respectively. Write the half reaction of HOCl being reduced to Cl- and develop the full pE/pH equation for this reaction. b)What is the pE of a HOCl/Cl- solution ...

statistics

An animal trainer obtained the following sample data (Table A) in a study of reaction times of dogs (in seconds) to a specific stimulus. He then selected another group of dogs that were much older than the first group and measure their reaction times to the same stimulus. The ...

Chemistry

What is the net chemical equation of: Reaction 1: 3.3 kcal/mol+glucose+Pi --> glucose-6-phosphate+H2O Reaction 2: ATP+H2O --> ADP+Pi+7.3 kcal/mol AND Calculate the amount of energy released in the coupled reaction. energy released: ____kcal/mol

Biochemistry

The ΔG°' for the reaction Citrate isocitrate is +6.64 kJmol-1= +1.59 kcalmol-1. The ΔG°' for the reaction Isocitrate α-Ketoglutarate is -267kJmol-1 = -63.9 kcalmol-1 What is the ΔG°' for the conversion of citrate to α-Ketoglutarate? Is that reaction...

Social Studies

Which of the following was not a goal of the New Deal? a Bring relief to the poor and unemployed b help recover the economy c end workers strikes c enact permanent reforms to prevent future economic depressions***** Which of the following best describes the opposition to the ...

Chem

Given: Al3+(aq) + 3e–  Al(s); E° = –1.66 V Cl2(g) + 2e–  2Cl–(aq); E° = 1.36 V What is ∆G° for the following cell reaction? 2AlCl3(aq)  2Al(s) + 3Cl2(g)

Chemistry

Please help me with this one... What is the oxidizing agent in the following redox reaction: HNO3(aq) + K2CrO4(aq) + Fe(NO3)2(aq) -> KNO3(aq) + Fe(NO3)3(aq) + Cr(NO3)3(aq) + H2O(l) ?

Chemistry

Calculate the enthalpy of reaction. D + F --> G + M using the following equations and data: G + C --> A + B ΔH = +277 kJ C + F --> A ΔH = +303 kJ D  B --> M ΔH = -158 kJ

Chemistry

Calculate the enthalpy of reaction. D + F --> G + M using the following equations and data: G + C --> A + B ΔH = +277 kJ C + F --> A ΔH = +303 kJ D  B --> M ΔH = -158 kJ

ap chemistry

a cell is based on the following reaction Fe(s)+2Fe+3(aq) -----> 3Fe+2 (aq) E cell= 1.18 V. Calculate the concentration of iron (II), in M, if the cell emf is 1.28 V. when [Fe^(3+)]= 0.5 M the answer is 0.047 M

Chemistry

The reaction X + Y --> Z the reaction rate is for to depend only upon the concentration of X. A plot of 1/X versus time gives a straight line. What is the rate law for this reation?

Chemistry

The reaction X + Y --> Z the reaction rate is for to depend only upon the concentration of X. A plot of 1/X versus time gives a straight line. What is the rate law for this reation?

Gen Chem

The signs of DG, DH, and DS at 25°C are shown in the table below for three reactions. Reaction DG DH DS I - + + II - - + III - - - Which reaction or reactions should go in the REVERSE direction at high temperature?

chemistry

what mass of copper II nitrate would be produced from the complete reaction of 45.6g of copper according to the chemical reaction : Cu + 2 AgNO3 (can't make it a small 3, sorry)----Cu(NO3) + 2 Ag

chemistry 101

given the reaction: 2mg + o2-----> 2mgo . when 4.32g of oxygen react with magnesium 327kj of energy is produced. the heat of reaction for 1 mole of oxygen is???

Chemistry

Consider the rxn during the Haber Process: N2 + 3H2 ---> 2NH3 The equilibrium constant is 3.9 x 10^(5) at 300 K and 1.2 x 10^(-1) at 500 K. Find Delta H reaction and Delta S for reaction

biochemistry

Reaction A B proceeds with H = 240 kJ×mol-1; S = 40 J×K-1×mol-1. Substance A was taken at initial concentration 2 mM. Determine the concentrations of A and B after the reaction reaches equilibrium at 298 K.

chemistry

During a reaction, you see that the heat (q) given off is 3.8 calories. Knowing that you used a mass of 100 g and that the temperature change was 7.85°C, what is the specific heat of this reaction?

Chemistry

A decomposition reaction has a rate constant of 0.0019 yr -1. ( a) What is the half-life of the reaction? ______ yr (b) How long does it take for [reactant] to reach 12.5% of its original value? ______ yr

Chemistry!!!

Consider the rxn during the Haber Process: N2 + 3H2 ---> 2NH3 The equilibrium constant is 3.9 x 10^(5) at 300 K and 1.2 x 10^(-1) at 500 K. Find Delta H reaction and Delta S for reaction

Chemistry

Suppose 1 gram of Li2CO3 is reacted with in 50.0 mL of 3.00 M HCl. What would be the mass of CO2 liberated in the reaction? After the reaction, how many moles of HCl are left over?

chemistry

Equilibrium constant K for some reaction at temperature 300K was found to be 100 .Calculate equilibrium for same reaction at 400K if R= 8.23 change in enthalpy is 5000J

Chemistry

I have this question as a review question: The reaction N2(g)+3H2(g)<-->2NH3(g) begins with 1.15 M N2 and 1.36 M H2. At equilibrium, the concentration of NH3 is 0.78 M. Determine the extent of reaction. The answer is supposed to be 86 but I don't know how

chemistry

Consider the reaction Select a possible mechanism for the reaction. Step1:Step2:2X2Y⇌X4Y2 (fast)X4Y2+Z2→2X2YZ (slow)

chemistry

Use the balanced equation below to answer the following questions. 2Al(NO3)3 + 3Na2CO3 Al2(CO3)3(s) + 6NaNO3 - What is the ratio of moles of Al(NO3)3 to moles Na2CO3? (1 point) - If 852.04 g Al(NO3)3 reacted with the 741.93 g Na2CO3, which would be the limiting reagent? Show ...

Physics

In stars, nucleons (protons and neutrons) form nuclei of atoms via a series of fusion reactions. If for a particular fusion reaction more energy is given off than is required to make it proceed, does the final nucleus have a higher or lower rest mass than the sum of the rest ...

math

Write the steps to solve the following problem. Explain your steps as you solve it. A certain computer can perform 105 calculations per second. How many calculations can it perform in 10 seconds? PLEASE HELP ME!!!

math

write all the steps to solve the following problem. explain your steps as you solve it. a certain computer can perform 10^5 calculations per second. how many calculations can it perform in 10 seconds?

Biochemistry

You wish to make 3 reactions (1 ml each) with the specified amounts of protein. The remainder of each reaction consists entirely of buffer. The source of your protein is a stock solution that has a concentration of 0.5 mg/ml. What is the volume of stock solution required for ...

Chemistry Redox Reaction

Balance the equation as a redox reaction in acidic solution. Cu(s)+NO3^-1(aq)-->Cu^2+(aq)+NO(g)

chem

Write a total ionic equation for the reaction (if any) of FeCl2 with Cu, and for the reaction (if any) of FeCl2 solution with Al

chemistry

The equilibrium constant Kc for the reaction C <--> D + E is 7.90 * 10^-5. The initial composition of the reaction mixture is [C]=[D]=[E]=1.10*10^-3. What is the equilibrium concentrations of C, D, and E? C=? D=? E=?

Chemistry

If the rate of the reaction is 3.5 x 10-3 at 330 K, and the rate of reaction at 285 K is 5.2 x 10-5 what is the activation energy Ea in KJ/mole?

Chemistry

The activation energy (E*) for a reaction is 195 KJ. If the k for this reaction is 3.46 x 10-5/min at 35oC, what will the temperature be in OF when k is 1.5 x 10-3/min?

chemistry

Cu2+ + 2e- -> Cu Oxidation reaction Cu -> Cu2+ + 2e Reduction Reaction Do I have these right, or are they backwards?

Algebra 1-Matrix

In a certain county the proportion of voters in each age group registerd as Republicans and Democrats or Indpendence is given by the following matrix which is called A. 18-30 31-50 Over50 Republican 0.40 0.30 0.70 Democrat 0.30 0.60 0.25 Indpendent 0.30 0.10 0.05 The ...

9th grade

two of the forms of a linear equation are standard form and slope-intercept form. explain when each one is more useful

history

can i get sites where i can find the answer which of the following is a reason the United States became involved in affairs in the Middle East following World War II? a. to limit Jewish immigration into the region b. to prevent oil-rich Arab nations form falling under Soviet ...

Molecular Bio

You are planning to digest human genomic DNA with the EcoRI restriction enzyme but realize you do not have any 10X buffer available to add to the reaction. The components of the 10X buffer are: 50 mM NaCl, 100 mM Tris, 10 mM MgCl2, and 0.025 % TritonX-100. You search around ...

chemistry

A reaction is 50% complete in 34.0 min. 1.) How long after its start will the reaction be 75% complete if it is first order? 2.)How long after its start will the reaction be 75% complete if it is zero order? steps would be helpful

Calculus

For the following integral find an appropriate TRIGONOMETRIC SUBSTITUTION of the form x=f(t) to simplify the integral. INT x(sqrt(8x^2-64x+120))dx x=?

Calculus

For the following integral find an appropriate TRIGONOMETRIC SUBSTITUTION of the form x=f(t) to simplify the integral. INT (x)/(sqrt(-191-8x^2+80x))dx x=?

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