# a certain reaction has the following generaln form

27,660 results, page 17

1. ### Chemistry

The rate constant for the rxn of hydrogen reacting with iodine to form hydrogen iodide is 2.7 X 10^-4 L/mol*s at 600. K and 3.5 X 10^-3 L/mol*s at 650. K. a) determine the activation energy for this reaction. b) determine the rate constant at 700. K
2. ### ap chem

an unknown gaseous hydrocarbon reacts with oxygen to form CO2 and H2O, DETERMINE HEAT OF FORMATION FOR THE HYDROCARBON. the density of the mixture of CO2 and H2O at 1 atm and 200 degree celsius is 0.751g /L and heat of reaction is equal to -2044.5 KJ /MOL hydrocarbon
3. ### Math help....

3r=-6cosx I need help converting to rectangular form also:change to polar co-ordinate form 3xy=5
4. ### computer

write the following exponent.form.into fractional form: 1) 55.67878E05 2) 67.34567-E04 3) 34.5678E05
5. ### medical terminologhy

combining form and suffix to form number 1 abnormal softining of a kidney
6. ### mathematics

the complex numbers 1,-1,iorta root3 form which type of triangle in graphical form
7. ### Math

How do you write 2.15 1/2 in expanded form. Our topic is transforming fractions in decimal form... but what is the fraction 1/2 doing there?
8. ### linear algebra

Reduce the quadratic form Q(x)=x^2+y^2+z^2+2xy-4yz+6xz to diagonal form.
9. ### Math

Convert equation from quadratic form to vertex form, y= a(x-h)^2 +k, by completing the square. y= -.25x^2+5.5x-5.25
10. ### Math

A parabola has intercepts of x = -2, x = 3, and y = -4 how do I write this into these forms: the intercept form (y = a (x – m)(x – n)) and in standard (y = ax2 + bx + c) form
11. ### Chemistry

Which of the following elements is least likely to form a cation that will then form an ionic bond with an ion of a Group 7A element? S K Rb Fr
12. ### PreCal

express in form a+bi (1+2sqrt3)(2-3sqrt-3) so I came up with 2-3i sqrt3 + 4sqrt3 - 18i Is that solution a+bi form
13. ### MaTH

Rearrange the terms of the equations fo form Ax + By = C I really get confused about general form, like how do I do it, I don't understand at all. x+3y = -1 2x+4y-12 = 0
14. ### MAATH

Rearrange the terms of the equations fo form Ax + By = C I really get confused about general form, like how do I do it, I don't understand at all. x+3y = -1 2x+4y-12 = 0
15. ### math

express each of the following expressions in the form nPr or in the form nCr a. 27x26x25x24/4x3x2x1 b. 30x29x28x27x26
16. ### Algebra 2 Mannn

9x^2-y^2-72x+8y+119. how do i change this equation from general form to standard form.
17. ### 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 ...
18. ### Chemistry Repost

I mixed 5ml H202 with 5ml KI with 5ml H2SO4 wit Na2So2O3 with 50ml. Now I am trying to figure out all the elementary steps for this reaction. A starch was added in this mixture to measure the reaction time with the thiosulfate and the I2. I was just wonder if anyone could give...
19. ### Statistics

12) Allergic reactions to poison ivy can be miserable. Plant oils cause the reaction. Researchers at the Allergy Institute did a study to determine the effects of washing the oil off within 5 minutes of exposure. A random sample of 1000 people with known allergies to poison ...
20. ### Statistics

12) Allergic reactions to poison ivy can be miserable. Plant oils cause the reaction. Researchers at the Allergy Institute did a study to determine the effects of washing the oil off within 5 minutes of exposure. A random sample of 1000 people with known allergies to poison ...
21. ### chem

At a certain temperature, a 19.0-L contains holds four gases in equilibrium. Their masses are: 3.5 g SO3, 4.6 g SO2, 14.0 g N2, and 0.98 g N2O. What is the value of the equilibrium constant at this temperature for the reaction of SO2 with N2O to form SO3 and N2 (balanced with ...
22. ### science, chemistry

Lead metal is added to 0.150 M Cr3+(aq). Pb(s)+2Cr3+(aq)⇌Pb2+(aq)+2Cr2+(aq). KC=3.2×10−10 What is [Pb2+] when equilibrium is established in the reaction? What is [Cr2+] when equilibrium is established in the reaction? What is [Cr3+] when equilibrium is established in the ...
23. ### Chemistry

-CORRECTION- N2 + O2 --> 2 NO change in heat (delta H)= 43.2 kcal based on the reaction, which statement is true? a) 43.2 kcal are consumed when 1.00g of O2 reacts b) 43.2 kcal are consumed when 1.00g of N2 reacts c) 43.2 kcal are consumed when 1.00g of NO is produced d) 43...
24. ### Chemistry

A reaction of importance in the formation of smog is that between ozone and nitrogen monoxide described by O3(g)+NO(g) --> O2(g)+NO2(g) The rate law for this reaction is: rate=k[O3][NO] Given that k = 2.87 × 106 M–1·s–1 at a certain temperature, calculate the initial ...
25. ### Chemistry

A reaction of importance in the formation of smog is that between ozone and nitrogen monoxide described by O3(g)+NO(g) --> O2(g)+NO2(g) The rate law for this reaction is: rate=k[O3][NO] Given that k = 2.87 × 106 M–1·s–1 at a certain temperature, calculate the initial ...
26. ### chemistry

For the reaction H2(g) + I2(g) ¡ê 2 HI(g), you have the initial concentrations [H2] = 0.15 and [I2] = 0.05. Keq for the reaction at this temperature is 4.5 x 10-6. Make a reaction table. Include rows for initial concentration, change in concentration, and equilibrium ...
27. ### chemistry

In a reaction involving the bromination of acetone, the following initial concentraions were present in the reaction mixture. acetone (0.8mol/L), H+ (0.2 mol/L), Br2 (0.004 mol/L) At 25 degrees C, it took 240s before the colour of Br2 disappeared. If the reaction is zero order...
28. ### chemistry

In the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water, the oxidizing agent is____ is it hydrogen peroxide? cus its not water right?
29. ### chemistry

In the commercial production of the element arsenic, arsenic (II) oxide is heated with carbon which reduces the oxide to the metal according to the following equation: 2As2O3 + 3C ----„³ 3CO2 +4As A>if 8.87 g of As2O3 is used in the reaction and 5.33 g of As is produced ...
30. ### chemistry

aspirin is synthesized through the following reaction C7H603+C4H6O3=C9H8O4=HC2H3O2 a)Assuming the maximum yield that could be obtained is 76.8% what mass of Aspirin C9H8O4 could be obtained from this reaction when 2.00 * 10^2 grams of C7H6O3 reacts with 145.30 grams of C4H6O3...
31. ### Chemistry

Based on the following chemical equation answer the question below show all your calculation The balanced chemical reaction of iodine with hydrogen sulfide h2s(g)+i2(s)-----2HI(g) + S(s) (a) Based on the above chemically balanced equation, how many grams of HI should be ...
32. ### chemistry

Based on the following chemical equation, answer the questions below. Show all your calculation The balanced chemical reaction of iodine with hydrogen sulfide is as follows: H2S(g)+I2(s)-----2HI(g) + S(s) (a) Based on the above chemically balanced equation, how many grams of ...
33. ### chem

a.) At equilibrium, the molar concentrations for reactants and products are found to be [I2] = 0.50 M,[Cl2] = 0.60 M, and [ICl] = 5.0 M. What is the equilibrium constant (Kc) for this reaction? b.) The concentration of I2 is increased to 1.5 M, disrupting equilibrium. ...
34. ### CHEMISTRY HELP ASAP PLEASE!!!!!!!!!!!!!!!

In the commercial production of the element arsenic, arsenic (II) oxide is heated with carbon which reduces the oxide to the metal according to the following equation: 2As2O3 + 3C ----„³ 3CO2 +4As A>if 8.87 g of As2O3 is used in the reaction and 5.33 g of As is produced ...
35. ### chem

Is ammonium hydroxide a strong or weak base and how do you know that? Technically there is no such thing as ammonium hydroxide. NH3 gas (ammonia gas) dissolves easily in water and produces the NH4^+ and the OH^- from the reaction with water. It is a weak base because that ...
36. ### Calculus

Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)
37. ### Calculus

Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)
38. ### math

write each decimal in expanded form, in word form and as a fraction. 4.1967 3.504 0.6045
39. ### Medical Terminology

The combining form chem/o is used to form the word chemotherapy because therapy begins with a ____________?
40. ### Calculus

Find a solution to the equation if possible. Give the answer in exact form and in decimal form. 8=4sin(5x)
41. ### Spanish

Explain how to form the usted form of the imperative of the regular -ar verb hablar I know that -ar verbs end in e
42. ### medical information management

you're the chairperson of the form committee. discuss the basic specifications for designing a form
43. ### Music appreciation

What muscial form preceded the sonata allegro form that was often considered dramatic and rewarding.

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

The form of the melody called the bar form is represented by A)AAB B)ABB C)ABA D)ABBA
46. ### 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
47. ### Spanish but need super help

Explain how to form the usted form of the imperative of the regular ar verb hablar. Pls help
48. ### chemistry

Consider the following reaction. 2KClO3(s) → 2KCl(s) + 3O2(g) a. How many grams of KCl are produced from the complete reaction of 2.16 mol of KClO3? 161g b. How many grams of KCl are produced from the complete reaction of 52.7 g of KClO3? 32.1 g

what is standard form ? and What is expanded form ?
50. ### calculus

Put the function P=40(39)t in the form P0e^kt. When written in this form, you have: k= ? P0= ?
51. ### Math

Put the function P= 35(1.3)^t in the form P0ekt When written in this form, you have: K= P0=
52. ### Music

Explain sonata form name and sections. What is Aria form?
53. ### Chemistry

For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 atm for all species. For the reaction 2NO(g) + O2(g) --> 2NO2(g) the standard change in Gibbs free energy is ΔG° = -69.0 kJ/mol. What is ΔG for this reaction at 298 K when the ...
54. ### chemistry

enthalpy change^H is +23kJ mol-1 of phosphine (PH3) for the reaction 2P(s)red+3H2(g)---->2PH3(g) a) Calc. entropy change for this reaction. Explain how this information allows you to determine the spontaneity or non-spontaneity of this reaction at any temp (S for PH3 is ...
55. ### Chemistry

1. What is the reaction between copper(II) sulfate and barium hydroxide? 2. What is the reaction between thiocyanate and iron(III) nitrate? 3. What is created when hydrogen peroxide is heated? 4. What is produced when HCl and KMnO4 is mixed?
56. ### 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?
57. ### 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?
58. ### 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?
59. ### Chemistry

My teacher is an idiot and wont teach our class and im panicking so please help anyone. Given the following equations enthalpy values, determine the heat of reaction (kj) at 298k for the reaction: B2H6(g)+6Cl(g)=2BCl3(g)+6HCl(g)
60. ### 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?
61. ### 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?
62. ### Chemistry

Calculate E°cell (in volts) for a fuel cell that employs the reaction between methane gas and oxygen to form carbon dioxide and water. (to 4 significant figures) ∆G⁰f for CH4 = -50.5 kJ/mol ∆G⁰f for CO2 = -394.4 kJ/mol F = 96485/mol e- I got 0.4455 V ...
63. ### chemistry

4. Phosphorous trichloride, PCl3, reacts with water to form phosphorous acid, H3PO4, and hydrocholoric acid: PCl3+ 3H2O> H3PO3+3HCL a. what is the limiting reactant when 10.0g of PCl3 is mixed with 12.4 g of H2O? b.what mass of HCl is formed? C. how much excess reactant ...
64. ### chemistry

I have two Questions I need help with. 1. Why do some combinations of ionic compounds form a precipitate while other ionic compounds don't? AND 2. Solutions of lead(II)nitrate and potassium iodide are combined in a test tube and form a yellow precipitate. What is the molecular...
65. ### Physical Science

The physical properties of ice are different from the physical properties of dry ice (frozen carbon dioxide). But the physical properties of gaseous water vapor and the physical properties of gaseous carbon dioxide are the same. Why? A.) The valence electrons are more tightly ...
66. ### chemistry

Use the following steps to balance the redox reaction below: Mg + Au+ Mg2+ + Au -Write the oxidation and reduction half-reactions. Make sure each half-reaction is balanced for number of atoms and charge. -Multiply each half-reaction by the correct number, in order to balance ...
67. ### chemistry

For the reaction shown below complete the following calculations. H2(g) + C2H4(g) --> C2H6(g) (a) Estimate the enthalpy of reaction using the bond energy values in Table 9.4. (b) Calculate the enthalpy of reaction, using standard enthalpies of formation. (ΔH°f for H2...
68. ### Check my answers? (Chemistry)

I only get one chance for each of these questions so I was wondering if someone could check my answers, thanks! 1. Consider the following reaction at equilibrium. 2 BrNO(g) ---> 2 NO(g) + Br2(g) Predict the effect of the following changes to the reaction mixture. (a) adding...
69. ### Chem

COMPOUND 1 CH2 = CH-CH-OH with CH3 under the second CH Plus CH3-CH-CH2-C (double bond O off C and -OH off C) also a CH3 under CH i) complete the equation for this reaction ii) Indentify any new functional groups in the organic product(s)name them iii)State the type of reaction...
70. ### Algebra

1) what is the degree of the monomial 3x^2y^3 A)2 B)3 C)5 D)6 2. What is the simplified form of 8b^3c^2 + 4b^3 c^2 A) 12bc B)12b^3c^2 C) 12b^6 c^4 D) 12b^9c^4 3. What is the simplified form of (4j^2+6)+(2j^2-3) A) 6j^2-3 B) 6j^2+3 C) 6j^2 + 9 D) 4j^4+3 4. What is the diffrence...
71. ### Chemistry

I have read Le Chateliers principle but am having a little trouble explaining the effect of pressure and temperature on the equilibrium yield of methanol (CH3OH). Can anyone also tell me the effect of the increase of temp will have on the rate of the reaction? Yield of ...
72. ### Chemistry

What causes a reaction to be spontaneous? Answer by answering each part a) (1 point) What is definition of spontaneous reaction?b) (1 point) What is Gibbs free energy?c) (1 point) How is Gibbs free energy related to a spontaneous reaction?d) (1 point) What is an example of a ...
73. ### Math - algebraish

hey how do we convert y=mx+b to standard form? the standard form of the equation of a straight line is usually considered to take this form Ax + By = C, where A,B, and C are integers and A is positive. So if your equation is in the slope-yintercept form step 1: eliminate any ...
74. ### college chemistry - answer check ASAP!

The corrosion of iron can be thought of as an electrochemical cell reaction. Calculate the voltage difference between two points of corroding iron differing only in their partial pressures of oxygen: 0.20 atm of oxygen at one point and 0.0010 atm of oxygen at the other. The ...
75. ### Chemistry

A gaseous mixture containing 4.15 mol of hydrogen gas and 7.13 mol of oxygen gas reacts to form steam (a) Write the balanced equation for the reaction. (b) What is the limiting reactant? (c) What is the theoretical yiels of steam in moles? (d) How many moles of the excess ...
76. ### Chemistry

Elemental sulfur can form sulfur trioxide when burned. When sulfur trioxide is dissolved in water, it yields sulfuric acid. The net reaction is shown. What mass of sulfur is needed to yield 138 grams of sulfuric acid. S8(s) + 12O2(g) + 8H2O(l) --> 8H2SO4(l) Help?
77. ### HCR/220

In your opinion does the HIPPA 837 form have more pertinent information than CMS-1500 form when submiting.
78. ### Trigonometry

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

Hi, I'm trying to learn logarithmic form and I'm kinda of stuck Write in exponential form: 1.log(3)6561=x 2.x^4 = 625 Thank you
80. ### Algebra

Hi, I'm trying to learn logarithmic form and I'm kinda of stuck Write in exponential form: 1.log(3)6561=x 2.x^4 = 625 Thank you
81. ### biology Help

The fertilized egg undergoes cell divisions that form a ball of cells during (A)__________. During (B)__________, the endoderm, ectoderm, and mesoderm form. All the tissues of the adult body will come from these three germ layers. Differentiation is the process where cells are...
82. ### biology help

The fertilized egg undergoes cell divisions that form a ball of cells during (A)__________. During (B)__________, the endoderm, ectoderm, and mesoderm form. All the tissues of the adult body will come from these three germ layers. Differentiation is the process where cells are...
83. ### ap chemistry

Some reactions that are predicted by their sign deltaG to be spontaneous at room temperature do not proceed at a measurable rate at room temperature. A suitable catalyst increases the rate of such a reaction. What effect does the catalyst have on deltaG for the reaction? AND ...
84. ### AP Chemistry

This is the question I am having trouble with: A voltaic cell consists of a strip of lead metal in a solution of Pb(NO3)2 in one beaker, and in the other beaker a platinum electrode is immersed in a NaCl solution, with Cl2 gas bubbled around the electrode. A salt bridge ...
85. ### Chemistry

Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide according to the equation: 3 NO2 (g)+ H2O (l) --> 2HNO3 (l) + NO (g) Suppose that 5 mol NO2 and 1 mol H2O combine and react completely. How many moles of the reactant in excess are present after ...
86. ### Chemistry (Check)

In a calorimeter experiment done at constant pressure in which all the heat from a chemical reaction was absorbed by the surrounding water bath, the temperature of the water went up by 2.31 K. If the size of the water bath was 200 g, what was the amount of heat transferred to ...
87. ### CHEMESTRY

One of the few xenon compounds that form is cesium xenon heptafluoride (CsXeF7). How many moles of CsXeF7 can be produced from the reaction of 13.0 mol cesium fluoride with 14.0 mol xenon hexafluoride? CsF(s) + XeF6(s) --> CsXeF7(s)
88. ### CHEMESTRY

One of the few xenon compounds that form is cesium xenon heptafluoride (CsXeF7). How many moles of CsXeF7 can be produced from the reaction of 13.0 mol cesium fluoride with 14.0 mol xenon hexafluoride? CsF(s) + XeF6(s) --> CsXeF7(s)
89. ### Chemistry

in the reaction of aluminium and iron (III) oxide to form iron and aluminium oxide, H-850 kJ. how many grams of aluminium oxide are formed when 350 kJ are released? 2Al(s) + Fe2O3 -- Fe(s) + Al2O3(s) H=-850 kJ
90. ### Chemistry

8) ( 1 point) What is the maximum number of grams PH₃ that can be formed when 3.4 g of phosphorus reacts with 4 grams of hydrogen to form PH₃? P₄ (g) +6H₂ (g) → 4PH₃ (g) * 3.7 g 6.8 g 45 g 270 g 10. Lead nitrate can be decomposed by heating. What is the percent ...
91. ### Chemistry

I'm reviewing for a test and I'm on Le Chatelier's principle. Decreasing the temperature of an exothermic reaction shifts the equilibrium to the right? I understood this weeks ago but now I can't remember. Wouldn't decreasing the temperature cause there to be less collisions ...
92. ### chemistry

is this the answer to B ) CH3CH2OH + 3O2 → 2CO2 + 3H2O In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and ethanol are "burned" to water vapor andCO2. Write a combustion reaction for ethanol...
93. ### Chemistry

When the oxide of generic metal M is heated at 25.0 °C, only a negligible amount of M is produced. O2M(s) ----> M(s) +O2(g) delta G= 290.5 Kj/mol When this reaction is coupled to the conversion of graphite to carbon dioxide, it becomes spontaneous. What is the chemical ...
94. ### chemistry

For 2SO2(g)+O2(g)⇌2SO3(g), Kp=3.0×104 at 700 K. In a 2.00-L vessel the equilibrium mixture contains 1.15 g of SO3 and 0.107 g of O2. 1) How many grams of SO2 are in the vessel? ---------------------------- A flask is charged with 1.500 atm of N2O4(g) and 1.00 atm NO2(g) at ...
95. ### 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 ...
96. ### Biology Asap!

1. A hypothesis and a theory are related because A.a Theory is always used to develop a hypothesis B.They are both developed in the absence of observations. C. the data collected when a hypothesis is tested can support a theory. D. an experiment is done before the formation of...