# a certain reaction has the following generaln form

74,866 results, page 35

1. ### chemistry

Give the balance chemical reaction from the following decays.(a) loss of B^+ by ^15,8 O (b) loss of B^- by ^Ag (c) loss of * by ^46,62Sn
2. ### Chemistry quistion help!

I need help answer this question for a chemistry homework. What are the products in a reaction between an acid and a base? How can you tell that a reaction has occurred?
3. ### Chemistry

A reaction A+B---> C has a standard free energy change of -5.13 kj/mol at 25 degrees celcius, What are the concentrations of A, B, and C at equilibrium if at the beginning of the reaction there concentrations are .3M, .4M, and 0M respectively?
4. ### Chemistry

2NO(g) + H2(g) --> N2O(g) + H2O(g) + energy. 1. Assume the reaction is reversible and at equilibrium. What shifts in the equilibrium of this reaction are suggested by Le Chateliers Principle?
5. ### Chemistry

the standard free energy change for a chemical reaction is +13.3 kj/ mol. What is the equilibrium constant for the reaction at 125 degree C ? (R= 8.314 j/mol )

CaCl2(aq)+Na3PO4(aq) -----------> Ca3(PO4)2(s) +NaCl(aq)4) If the “H” for this reaction is -45.5 kJ/mol, is the reaction endo- or exothermic? Exothermic
7. ### chemistry

The reactant concentration in a second-order reaction was 0.790 after 200 and 8.80×10−2 after 740 . What is the rate constant for this reaction?
8. ### Chemistry

For the reaction 2NH3(g) 3H2(g) N2(g) at 472oC equilibrium is established when [H2] =0.0200M, [N2] = 0.0100M and [NH3] = 5.37x10^_8 M. What is the equilibrium constant for the reverse reaction?
9. ### Chemistry

The balanced reaction equation for the combustion of heptane, C7H16, is given below. If the reaction produced 37.5 g CO2, how many grams of heptane were burned?

It is required to titrate ethanol solution .Being available a 0.2mol/l potassium dichromate solution and 4mol/l sulfuric acid solution on the presence of a convenient indicator. a)indicate the glassware used for titration. b)give a brief description of the procedure followed ....
11. ### Chemistry

How many grams of glycine amide (FM 74.08) should be used with 1.0 gram of glycine amide HCl (FM 110.54, pKa=8.20) to give 100 mL at pH 8.0? The buffer equilibrium reaction is: GlycineAmideHCl <--- ---> GlycineAmide + H+ which has the general form: BH+ <--- Ka --->...
12. ### Medical Billing and Coding

What form should be attached to a CMS-1500 claim form submitted to a secondary insurance company?
13. ### maths/ physics

Determine the two square roots of 3+j4 in both a)Cartesian form b) Polar form Any help with this question would appreciated
14. ### HCR/220

In your opinion does the HIPPA 837 form have more pertinent information than CMS-1500 form when submiting.
15. ### physics/optics

Transpose the prescription -0.75DS/-3.25DCx30 to the toric form with a capstan-form surface which has a +2.50D base curve
16. ### Trigonometry

rectangular form to polar form xy=12 rsinÆŸ rcosÆŸ=12 would the answer be: r^2=12/cosÆŸ sinÆŸ please show steps, Thanks
17. ### gen chem

A nuclear reaction, such as the transmutation of uranium-238 to a stable isotope lead-206, involves exothermic and endothermic processes. In this reaction, is there any physical and chemical changes involved?
18. ### Chem

How do I go about solving this reaction? H2SO4 + NaCO3 = NaSO4 +CO2 + H2O If 150.0g of sulfuric acid is spilled, what is the minimum number of sodium carbonate that have to be added to complete the reaction?
19. ### Science

When a chemical reaction is carried out in an industrial setting, it is very common to have one of the reactants present in an excess amount above the stoichiometric quantity that would be needed for the reaction. Why?
20. ### why will no one answer? chem

If the reaction Cl2 (g) + O3 (g) = Cl2O (g) + O2 (g) occurred in just two steps, what would be the overall order of the reaction be? a. 1 b. 2 c. 3 d. 4 e. not possible to determine from the information given i have absolutly no idea how to do this

If the reaction Cl2 (g) + O3 (g) = Cl2O (g) + O2 (g) occurred in just two steps, what would be the overall order of the reaction be? a. 1 b. 2 c. 3 d. 4 e. not possible to determine from the information given I chose 2 as the answer. Is this correct?
22. ### chemistry

The chemical reaction for dissociation of an acid is: HA + H2O → H3O+ + A- Assuming all of the hydronium ion (calculated in in the previous problem) comes from this reaction, what is the concentration of conjugate base, [A-], in this system?
23. ### chemistry

the reaction of 7.10g carbon with excess O2 yields 12.25g of CO2. what is the percent yield of this reaction? I have tried everything and looked through all of my notes and nothing is working for stiochiometry
24. ### chemistry

For the reaction below,when the reaction when 0.5000g of X13 reacts completely, 0.2360g of XC13 is obtained. Calculate the atomic weight of element Xmas and identify it 2X13 + 3C12--->2C13+312
25. ### Chem

The reaction for the industrial production of hydrogen cyanide is given below. 2CH4 + 2NH3 + 3O2 --> 2HCN + 6H2O What mass of NH3 is required for the synthesis of 1.5 × 105 kg of HCN if the reaction has a 97.5% yield?
26. ### Chem

The reaction for the industrial production of hydrogen cyanide is given below. 2CH4 + 2NH3 + 3O2 --> 2HCN + 6H2O What mass of NH3 is required for the synthesis of 1.5 × 105 kg of HCN if the reaction has a 97.5% yield?
27. ### Grammar

The following senetences are inverted. Write C if the subject-verb agreement is correct. Write I if the subject-verb agreement is incorrect. Then, on the line following each sentence, write the correct form of the verb. 1. Was Lyndon Johnson the next President? -- ? 2. Are ...
28. ### Chemistry

Determine whether the following reaction is endothermic or exothermic: Mg(g) + 2 F (g)--> Mg 2+(g) + 2 F- Mg: I1= 738 kJ/mol I2= 1451 kJ/mol F: EA= -328 kJ/mol
29. ### computer programming (PYTHON)

My first page is <html> <head> <title>Name Game</title> </head> <body> <h1>Name Game</h1> <form action="namegame.py"> <p> Enter your name: <input type="text" name="name" /> </p> <p> <input type="...
30. ### computer programming (PYTHON)

My first page is <html> <head> <title>Name Game</title> </head> <body> <h1>Name Game</h1> <form action="namegame.py"> <p> Enter your name: <input type="text" name="name" /> </p> <p> <input type="...
31. ### CHEMISTRY HELPPPP!!!!!!!!!

Consider the decomposition of NH3 (g). 2 NH3 (g) → N2 (g) + 3 H2 (g) The reaction is catalyzed on a surface of either tungsten or osmium. The activation energies for the catalyzed and uncatalyzed reactions are given below. W Ea = 163 kJ/mol Os Ea = 197 kJ/mol No catalyst...
32. ### Math help, anyone?

Solve the proportion. Where necessary, round to the nearest hundredth. Plz help i really need 2 get this in!! 11. 9/10 = x/10 9 *** 90 10 100 12. x/4 = 6/7 168 0.21 28 3.43 13.Write the ratio as a fraction in simplest form. 22:36 14. Write the ratio as a fraction in simplest ...
33. ### Biochem

You wish to measure the ∆G°' for the hydrolysis of ATP: ATP --->ADP + Pi But the equilibrium for the hydrolysis lies so far toward products that analysis of the ATP concentration at equilibrium is neither practical or accurate. However, you have the following data ...
34. ### CHEMISTRY

For the reaction 3 O2(g) reverse reaction arrow 2 O3(g) If the equilibrium mixture is analyzed and [O2(g)] is found to be 3.77*10-2 M, what is the concentration of O3(g) in the mixture?
35. ### Chemistry

The equilibrium constant, Kc is 3.2 x10 -34 at 25C for the reaction 2 HCl(g) <=> H2(g) + Cl2(g). what is The equilibrium expression, Kc for the reaction
36. ### Chemistry

Is CO + O2 -> CO2 an endothermic or an exothermic reaction? Also, are all combustion reaction endothermic? Thanks in advance.
37. ### Chemistry

H2 (g) + I2 (g) 2 HI (g) If the initial concentrations of H2 and I2 are 1.0 M and the initial concentration of HI is 0.5 M (Kc = 54.3 at 430oC). (a) Is the reaction at equilibrium? (b) If not, which way will the reaction proceed?
38. ### CHEMISTRY

The enthalpy change of an endothermic reaction is 8 kJ , and this reaction is spontaneous at 25 oC ,, what is the expected entropy change ? thank you a lot
39. ### science

How is a single replacement reaction different from a double replacement reaction? I am having trouble telling which on is which.
40. ### chemistry

What type of reaction would CO2 + H2O --> H2CO3 be I think it would be synthesis reaction?
41. ### Chemistry

If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximately
42. ### Chemistry

A chemical reaction produces 3.75 L of chlorine gas at STP. How many moles of chlorine are produced by the reaction?
43. ### Calculus

State whether the following are true or false. The square roots of 36 are + and - 6. I wrote down false for this cause I thought it was only + 6, but the real answer is true, and I want to know that how can it be negative? Also for this: Convert the following radicals to mixed...
44. ### Chemistry

Combustion of natural gas (primarily methane) occurs in most household heaters. The heat given off in this reaction is used to raise the temperature of the air in the house. Assuming that all the energy given off in the reaction goes to heating up only the air in the house, ...
45. ### Spanish Homework

Hi! I was wondering if someone can check my answers? Thanks! Directions: Respond correctly by using informal, formal, plural, and nosotros commands. 1.) Form the command for a friend: Don't come. My answer: No vengas. 2.) Form the command using the correct pronoun/s: Let's ...
46. ### Chemistry

2 H2S (g) + SO2 (g) <===> ƒnƒn3 S (s) + 2 H2O (g) 1) At 298 K, the standard enthalpy change, H¢X, for the reaction represented below is -145 kilojoules. (a) Predict the sign of the standard entropy change, S¢X, for the reaction. Explain the basis foryour prediction...
47. ### Chemistry

Which of the following aqueous solutions should form a precipitate with aqueous Fe(NO3)3? 1. KCl 2. KNO3 3. KOH 4. K2SO4
48. ### Chemistry

Which of the following aqueous solutions should form a precipitate with aqueous Fe(NO3)3? 1. KOH 2. KCl 3. K2SO4 4. KNO3
49. ### chemistry

Which of the following aqueous solutions should form a precipitate with aqueous Fe(NO3)3? 1. KNO3 2. KCl 3. K2SO4 4. KOH
50. ### AP chemistry

which of the following aqueous solutions should not form a precipitate with aqueous ba(no3)? 1. KOH 2. K2CO3 3. K2SO4 4. K3PO4
51. ### Calculus

Find the derivative of the following function using the appropriate form of the Fundamental Theorem of Calculus. intergral s^2/(1+3s^4) ds from sqrtx to 1 F'(x)=?
52. ### Algebra

in what form is the following linear equation written? 3x-2y=4 A.rise-run B.standard C.slope-intercept D.point-slope
53. ### Trig

Jimmy wants to rewrite the set of parametric equations x = 1/2 T + 3 and y = 2T - 1 in rectangular form by eliminating T. Which of the following equations would help him to eliminate T. A) t = 2(x-3) B) t = 2(x+3) C) t = y-1 / 2 D) t = 2(y+1)
54. ### Art

Which of the following objects is most likely to be considered a form of functional art? A. Stone B. Flower C. Garden D. Brick

Perform the indicated operations and simplify the result. Leave your answer in factored form. 1) x/16 - 1/x all over 1 + 4/x A) x+4/16 B) x-4/16 C) 16/x+4 D) 16/x-4 E) -16/x+4 I chose answer C. I saw this as x^2-16/ x+4. Multiply the following using the FOIL method. Express ...
56. ### 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 ...
57. ### 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 ...
58. ### 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 ...
59. ### Chemistry

I don't get how to fill in the blanks Show the products for cellular respiration by completing the following chemical reaction equation. Give the correct formula for oxygen as well Glucose+_________ ---> ________+______+___________
60. ### Chemistry

What volume of benzene (C6H6, d= 0.88 g/mL, molar mass = 78.11 g/mol) is required to produce 1.5 x 103 kJ of heat according to the following reaction? 2C6H6(l)+15O2(g)-->12CO2(G)+6H2O(g) :delta:Hrxn=-6278kj
61. ### chemistry

What is the minimum amount of 5.0M H2SO4 necessary to produce 24.1g of H2(g) according to the following reaction? 2Al(s) + 3H2SO4(aq) produces Al2(SO4)3(aq)+3H2(g). Express your answer using two significant figures.
62. ### physics

Identify the action-reaction paris in the following situations: a) a person takes a step b) a snowball hits someone in the back c) a footbal player catches a ball d) a leaf falls to the ground HELP
63. ### chemistry

Balance each of the following redox equations using the half-reaction method. HI(s) + H2SO4 (aq) --> H2S(g) + I2 (s) My only question about this equation is...how do I know how many electrons I need to put on both sides? Other than that I know how to do it.
64. ### Chemistry

1) given the following equation : Na2O 2Hl__>2Nal H2O (501.6KJ) a) 1f 9g of Nal are formed by the process, how much heat(q)will be involved? b) state whether the reaction is endorthermicor exothermic
65. ### Chemistry

Write the balanced chemical equation for each of the following. (Use the lowest possible coefficients. Include states-of-matter at 1 atm and 25unknown_prefixC in your answer.) (b) the reaction of magnesium metal and hydrobromic acid
66. ### chemistry help fast

The following reaction occurs in a blast furnace Fe2O3 +3Co--------2Fe+3Co2 Calculate the mass of carbon monoxide needed to reduce 16 tones of iron (111) oxide
67. ### Chemistry

use the appropriate standard reduction potentials in the appendix of your book to determine the equilibrium constant at 285 K for the following reaction under acidic conditions 4H+(aq) + MnO2(s)+2Fe+2(aq)----> Mn+2 (aq)+2Fe3+(aq)+2H2O(l)
68. ### Chemistry

use the appropriate standard reduction potentials in the appendix of your book to determine the equilibrium constant at 285 K for the following reaction under acidic conditions 4H+(aq) + MnO2(s)+2Fe+2(aq)----> Mn+2 (aq)+2Fe3+(aq)+2H2O(l)
69. ### 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, ...
70. ### 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)
71. ### 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 ...
72. ### 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
73. ### 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
74. ### 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!
75. ### 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
76. ### 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
77. ### 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
78. ### 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
79. ### 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?
80. ### 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?
81. ### 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?
82. ### 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
83. ### 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)
84. ### 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?
85. ### 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
86. ### Chemistry

Write the balanced chemical reaction (showing appropriate symbols and states) for the chemical reaction with enthalpy change equal to ΔHf° [NH3(g)]
87. ### 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
88. ### 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...
89. ### 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. ...
90. ### 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 ...
91. ### 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 ...
92. ### 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...
93. ### 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 ...
94. ### 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...
95. ### 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
96. ### 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.
97. ### 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?
98. ### 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.
99. ### 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.
100. ### 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