# For the reaction H2(g) + I2(g) ↔ 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

23,184 results, page 17
1. ## science

2KClO3 - 2KCl + 3O2 is formed ! now which kind of reaction is this ? and how can i say it is that particular reaction took place here?

asked by arvaz on June 23, 2017
2. ## Chem II

A first-order reaction is 35.5% complete in 4.90 minutes. The rate constant of the reaction is _____

asked by Ken on June 13, 2008
3. ## CHEMISTRY

In electrolysis , which reaction does occur on the cathode , half oxidation reaction or reduction ?

asked by MAD on July 10, 2014
4. ## Chemistry

For the following redox reaction, give the complete reduction half reaction. Na(s) + Al+3(aq) Na+1(aq) + Al(s) Please help asap!!

asked by Rae on November 10, 2016
5. ## biochemistry

The ΔG¡' of the reaction is -5.31 kJ ámolÐ1. Calculate the equilibrium constant for the reaction. (Assume a temperature of 25¡ C.)

asked by stoic-rider77 on February 3, 2013
6. ## physics

A cannonball is shot (from ground level) with an initial horizontal velocity of 38.0 m/s and an initial vertical velocity of 26.0 m/s. 1) What is the initial speed of the cannonball? 2) What is the initial angle θ of the cannonball with respect to the

asked by Dante on August 29, 2012
7. ## pyhsics

A cannonball is shot (from ground level) with an initial horizontal velocity of 36.0 m/s and an initial vertical velocity of 21.0 m/s. 1) What is the initial speed of the cannonball? 2) What is the initial angle θ of the cannonball with respect to the

asked by ali on September 8, 2012
8. ## Physics

A cannonball is shot (from ground level) with an initial horizontal velocity of 38.0 m/s and an initial vertical velocity of 26.0 m/s. The initial speed of the cannonball 46.04 m/s The initial angle θ of the cannonball with respect to the ground 34.38°

asked by Kayla on September 11, 2012
9. ## Physics

A cannonball is shot (from ground level) with an initial horizontal velocity of 38.0 m/s and an initial vertical velocity of 26.0 m/s. The initial speed of the cannonball 46.04 m/s The initial angle θ of the cannonball with respect to the ground 34.38°

asked by Kayla on September 11, 2012
10. ## Physics

A cannonball is shot (from ground level) with an initial horizontal velocity of 38.0 m/s and an initial vertical velocity of 26.0 m/s. The initial speed of the cannonball 46.04 m/s The initial angle θ of the cannonball with respect to the ground 34.38°

asked by Kayla on September 11, 2012
11. ## Physics

A cannonball is shot (from ground level) with an initial horizontal velocity of 38.0 m/s and an initial vertical velocity of 26.0 m/s. The initial speed of the cannonball 46.04 m/s The initial angle θ of the cannonball with respect to the ground 34.38°

asked by Kayla on September 11, 2012
12. ## chem

Calculate the potential for: Br2(l) + 2Cl-(aq) → Cl2(g) + 2Br-(aq) Use Eº = -.300 V when the concentrations of the soluble species are as follows: [Cl-] = 0.39 M, [Br-] = 9.0x10-3 M, PCl2 = 8.5x10-2 atm

asked by moe on November 8, 2015
13. ## Chemistry

Assuming equal concentrations, rank these aqueous solutions by their freezing point: low to high NH4Cl, Sn(ClO3)4, Na2SO4, and AlBr3.

asked by Mike on May 4, 2013
14. ## chemistry

Calculate the concentrations of all species in a 0.690 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10–2 and Ka2 = 6.3× 10–8.

asked by Jack on March 15, 2013
15. ## Chemistry

Calculate the amount of NaH2PO4 and Na2HPO4 needed to prepare 100 mL of a buffer with a pH = 8.25 so that the sum of concentrations of HPO4 and H2PO4 ions is 0.5 M. Where do I start? :/

asked by Anonymous on October 30, 2010
16. ## chemistry

I have this on my homework but cannot fine any examples in the book or my notes that relate to a problem set up this way, can you help? What are the concentrations of OH– and H in a 0.00078 M solution of Ba(OH)2 at 25 °C? Assume complete dissociation.

asked by candace on July 22, 2013
17. ## chemistry

Calculate the concentrations of all species present in a 0.100 M solution of weak polyprotic acid H3PO4. Ka1=7.5 x 10 ^-3, ka2 = 6.2 x 10 ^-8, Ka3= 3.6 x 10^-13 How the heck do I do this

asked by Kate on April 12, 2016
18. ## Chemistry

I am having trouble in calculating equilibrium concentrations. Where I get stuck will be at the end where I have to square root both sides and get the value of x to plug in the equation to get the individual concentration of every substance.

asked by Rosa on March 18, 2008
19. ## biology

You have a stock solution that is 350g/L . You perform a 9-fold serial dilution four times. What concentrations will you have in each of your diluted tubes in g/L? (Separate your answers with a comma.)

asked by Tsion on September 2, 2014
20. ## Climatology

Can anyone help with the following:- Measure the relevant sea level rises as accurately as possible. Give your answers in millimetres to one decimal place. What is the predicted annual sea level rise in 2050 associated with each of the following CO2

asked by Gary on May 21, 2009
21. ## physical science

the influence of the magnitude of the surface area on the rate of reaction of a specific reaction using rennies tables

asked by de kuilen on February 11, 2011
22. ## Chemistry - Rates

For a particular reaction, the rate constant is 2.32 ✕ 10−3 M/s at 185°C and 3.70 ✕ 10−3 M/s at 235°C. What is the activation energy for this reaction? _______ kJ/mol

asked by Jamie on September 13, 2017
23. ## Kinetics Problem II

The data below were collected for the following reaction: 2NO2 (g) + F2 (g) ->2NO2F(g) A: Calculate the value of the rate constant, k. B: What is the overall order of the reaction?

asked by Amy on January 30, 2013
24. ## Chemistry

Al(s) + MnO2(s) → Al2O3(s) + Mn(s) When this reaction is balanced, how many electrons are transferred in each half-reaction? The answer I got is 3*2=6. Is this correct?

asked by Summer on April 5, 2018
25. ## 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?

asked by Lisa on April 2, 2008
26. ## chemistry

consider the reaction in which 410g of Ca(NO3)2 react with just the right amount of lithium metal in a single replacement reaction ?

asked by obi on December 4, 2010
27. ## Chemistry

At a certain temperature, the reaction has Kc = 5 x 108. If a reaction mixture at equilibrium contains 0.26 M of H2 and 0.087 M of Cl2, what is the concentration of HCl?

asked by Anonymous on March 26, 2016
28. ## Dr.Bob222 Chem

I believe that you are correct because you have more experience in G-chem then I have. But how does doubling the reaction rate double the k value? Isn't k just a constant for a particular reaction?

asked by Devron on February 1, 2013
29. ## chemistry

Which element is reduced in the unbalanced reaction below? I− + MnO4− + H+ = I2 + MnO2 + H2O I no reduction occurred in this reaction O H Mn

asked by danny on April 16, 2015
30. ## chemistry

Consider the reaction between hydrogen and oxygen gases to form water: 2H2(g) + O2(g) ¨ 2H2O(l) Which of the following is not conserved in this reaction?

asked by amanda on September 30, 2013
31. ## chem

what test will you perform to determine when you have added sufficient NaOH solution to the reaction mixture in reaction 2

asked by erlicia on September 29, 2010
32. ## chem

what test will you perform to determine when you have added sufficient NaOH solution to the reaction mixture in reaction 2

asked by erlicia on September 29, 2010
33. ## chemistry

what gas is produced in the reaction between calcium carbide and water?write the balanced equation for the reaction.

asked by denis on November 22, 2011
34. ## Chemistry

At a certain temperature, the reaction has Kc = 5 x 108. If a reaction mixture at equilibrium contains 0.26 M of H2 and 0.087 M of Cl2, what is the concentration of HCl?

asked by Em on March 26, 2016
35. ## Chemistry - Science (Dr. Bob222)

Consider reaction below: 50H3O^+(aq) + 7Cr2O7^2-(aq) +3I_2(aq) --> 6IO_4^-(aq) + 14Cr^3+(aq) + 75H2O (l) How many electrons are transferred in this reaction?

asked by Adrik on April 14, 2014
36. ## Chemistry

A certain reaction has an activation energy of 37.30 kj/mol. At what Kelvin temperature will the reaction proceed 3.00 times then it did at 303 k?

asked by Josh on July 16, 2011
37. ## Chemistry

Given the balanced equation representing a reaction: 2CO(g)+O2(g)-->2CO2(g) what is the mole ration of CO(g) to CO2(g)in this reaction? (1)1:1 (2)1:2 (3)2:1 (4)3:2

asked by lisa fortuna on January 2, 2011
38. ## chemistry

A reaction rate increases by 60.3% when the temperature is increased from 21.5 to 35.6°C. Calculate the activation energy (in kJ/mol) for the reaction.

asked by matt on March 23, 2008
39. ## chemistry

Consider the following reaction: 3C(s) + 4H2(g) -> C3H8(g); DH° = –104.7 kJ; DS° = –287.4 J/K at 298 K What is the equilibrium constant at 400.0 K for this reaction?

asked by Anonymous on May 3, 2010
40. ## Chemistry

For the balanced redox reaction 2 Al(s) + 3 Br2(g) → Al2Br6(s), determine the number of electrons transferred in the overall reaction.

asked by Sarah on April 14, 2014
41. ## chemical

how to obtain the kinetic data for this reaction 2NO3+2H2>2H2O+N2 HOW TO PERFORM THIS REACTION IN LAB.

asked by assia on April 19, 2010
42. ## physics

Refering to reaction 2 H2(g) + O2(g) -> 2 H2O(g) and proving that the law of conservation of mass is obeyed during a chemical reaction.

asked by Belly.L on March 2, 2012
43. ## Chemistry

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.

asked by Sara on May 11, 2015
44. ## 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?

asked by Anonymous on May 20, 2012
45. ## chemistry

does a fission reaction release one-fourth of the amount of energy released ina fusion reaction?

asked by Anonymous on June 7, 2011
46. ## Chemistry

How much heat (in kilojoules) is released on reaction of 4.10 g of Al? Reaction: 2Al(s) + 3Cl2(g)--->2AlCl3(s) Delta H= -1408.4 KJ

asked by Jackie on February 16, 2010
47. ## Chemistry

Half reaction method of balancing redox reaction CHCl3 + MnO4- = Cl2 + CO2 + Mn+2

asked by Maria on September 15, 2016
48. ## chemistry

CO2 + 3H2 equilibrium CH4 + H2O what is the forward and reverse reaction for it? what are the units of Kc for this reaction?

asked by haseeb on May 16, 2015
49. ## CHEM

How are the forward and reverse rate constants for a one-step reaction related to the equilibrium constant for the reaction? A)Kc = kf x kr B) Kc = kf - kr C) Kc = kf + kr D) Kc = kf/kr

asked by Adam on May 29, 2010
50. ## chemistry

Consider the following reaction: 2 Mg + O2 → 2 MgO △H rxn = -1203 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 4 moles of Mg.

asked by katia on December 6, 2015
51. ## Physics

A projectile, fired with unknown initial velocity, lands 20.8 s later on the side of a hill, 2900 m away horizontally and 411 m vertically above its starting point. (Ignore any effects due to air resistance.) (a) What is the vertical component of its

asked by Anonymous on September 4, 2012
52. ## Physics

A projectile, fired with unknown initial velocity, lands 18.4 s later on the side of a hill, 2740 m away horizontally and 469 m vertically above its starting point. (Ignore any effects due to air resistance.) (a) What is the vertical component of its

asked by Anonymous on December 3, 2014
53. ## Physics

A projectile, fired with unknown initial velocity, lands 18.4 s later on the side of a hill, 2740 m away horizontally and 469 m vertically above its starting point. (Ignore any effects due to air resistance.) (a) What is the vertical component of its

asked by Anonymous on December 3, 2014
54. ## chemistry

Sodium nitrate reacts with copper (II) hydroxide. I know how to write it down: NaNo3+CuOH2----> NO REACTION The problem is that I don't understand why it's no reaction I know it's double replacement and we have to look at activity series of metal to figure

asked by sakura on February 26, 2015
55. ## chem

For the gaseous equilibrium represented below, it is observed that greater amounts of PCl3 and Cl2 are produced as the temperature is increased. PCl5(g) PCl3(g) + Cl2(g) a) What is the sign of S° for the reaction? Explain. b) What change, if any, will

asked by Luke on April 29, 2008
56. ## chemistry

If you had left your copper(II) nitrate/potassium hydroxide precipitate stand for a while, the precipitate would turn into a black powder. The copper doesn’t reduce in this reaction, but one mole of water is produced from the reaction of one mole of the

asked by Cortney on April 23, 2015
57. ## SCIENCE

I mix 300.0ml of the barium nitrate solution from 1c with 100ml of a 1.50M lithium phosphate solution. The reaction produces solid barium phosphate a. Write a balanced equation for the reaction. b. Which is my limiting reagent? c. How much barium phosphate

asked by AKASH on April 26, 2016
58. ## Physics

Sphere W (with an initial charge of zero) is touched to sphere A and then they are separated. Next, sphere W is touched to sphere B (with an initial charge of -26e) and then they are separated. Finally, sphere W is touched to sphere C (with an initial

asked by Phil on January 19, 2012
59. ## Chemistry

using kinetics explain: a.the increasing of concentration of reactants increases the rate of reaction. b.the addition of a catalyst increases the rate at which a reaction will take place. c.and increase in temperature increases reaction rate. d.a catalyst

asked by Chuck on March 3, 2008
60. ## 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^o = 290.3 kJ/mol When this reaction is coupled to the conversion of graphite to carbon dioxide, it becomes spontaneous.

asked by Janavi on March 23, 2014
61. ## chemistry

an ideal gas in a sealed container has an initial volume of 2.70L. at constant pressure, it is cooled to 25.00 C where its final volume is 1.75L. what was the initial temperature?

asked by Anonymous on September 18, 2013
62. ## physics

Diver jumps from a 10 m platform. Air time is 2.3 s. Horizontal displacement of the divers center of mass i 4 m. What is the divers initial velocity and initial angle?

asked by anders on May 27, 2015
63. ## physics

An object of mass m moving with initial speed of 15 m/s got an acceleration of 10 m/s^ after a constant force F is applied to it. How long does it take for the object to reach 90 meters from its initial position?

asked by Abdela said yimer on January 28, 2012
64. ## AP physics

A particle of mass 3.00 kg is projected vertically upward with an initial velocity of 20.0 m/s. Neglecting air resistance, the particle’s kinetic energy when it is 20 m above the initial position is:

asked by ali on December 11, 2014
65. ## physics

a golf ball is launched at a 37 degree angle from the horizontal at an initial velocity of 48.6 m/s. state the initial velocity in rectangular coordinates. please show me how to figure this out

asked by aimee on June 24, 2011
66. ## pressure

an ideal gas in a sealed container has an initial volume of 2.70L. at constant pressure, it is cooled to 25.00 C where its final volume is 1.75L. what was the initial temperature?

asked by Anonymous on September 18, 2013
67. ## Physics

The mens world record for the shot put, 23.12 meters. if the shot was launched from 6 feet above the ground at an initial angle of 42 degrees, what was the initial speed?

asked by Alyssa on November 29, 2009
68. ## physics

Diver jumps from a 10 m platform. Air time is 2.3 s. Horizontal displacement of the divers center of mass i 4 m. What is the divers initial velocity and initial angle?

asked by anders on May 27, 2015
69. ## Chemistry

The decomposition of hydrogen peroxide in the presence of potassium iodide is believed to occur by the following mechanism: step 1 slow: H2O2 + I^- = H2O + OI^- step 2 fast: H2O2 + OI^- = H2O + O2 + I^- 1) What is the equation for the overall reaction? Use

asked by Hannah on March 10, 2012
70. ## Chemistry

The decomposition of hydrogen peroxide in the presence of potassium iodide is believed to occur by the following mechanism: step 1 slow: H2O2 + I^- = H2O + OI^- step 2 fast: H2O2 + OI^- = H2O + O2 + I^- 1) What is the equation for the overall reaction? Use

asked by Hannah on March 11, 2012

The decomposition of hydrogen peroxide in the presence of potassium iodide is believed to occur by the following mechanism: step 1 slow: H2O2 + I^- = H2O + OI^- step 2 fast: H2O2 + OI^- = H2O + O2 + I^- 1) What is the equation for the overall reaction? Use

asked by Hannah on March 9, 2012

The decomposition of hydrogen peroxide in the presence of potassium iodide is believed to occur by the following mechanism: step 1 slow: H2O2 + I^- = H2O + OI^- step 2 fast: H2O2 + OI^- = H2O + O2 + I^- 1) What is the equation for the overall reaction? Use

asked by Hannah on March 11, 2012
73. ## Chemistry

A student titrated 1.852 g of a mixture containing potassium hydrogen phthalate, KHP....? A student titrated 1.852 g of a mixture containing potassium hydrogen phthalate, KHP, with 0.163 M NaOH solution. She recorded an initial buret reading of 0.84 mL and

asked by Cynthia on March 7, 2012
74. ## Science

1. Massive amounts of destructive energy are released when a nuclear fission bomb explodes. Where does that energy come from? a) A chain reaction occurs when uranium atoms split, releasing nuclear energy. b) Molecules break down, releasing chemical energy.

asked by Lez on May 15, 2016
75. ## physics

Please help. Thanks! A car/truck with an initial displacement of 10.0 m and an initial velocity of 16.0 m/s accelerates at an average rate of 0.50 m/s2 for 4.0 s. What is the vehicle's displacement after 4.0 s?

asked by kristi on November 30, 2011
76. ## Chemistry

3. An electrochemical reaction occurs between an unknown element and zinc. The half-cell reaction for the zinc is: Zn(s) → Zn2+(aq) + 2e− The cell potential for the reaction is Eºcell = 1.83 V. a. Is the reaction spontaneous or nonspontaneous?

asked by Morgan on October 22, 2014
77. ## Chemistry; Stoichiometry

Consider the reaction 2Al + 3CuSO4 = Al2(SO4)3 + 3Cu What is the maximum amount of Cu (63.5 g/mol) that could be produced by reacting 20.0 grams of Al (27.0 g/mol) with excess CuSO4? 1. 70.6 g 2. 57.2 g 3. 129 g 4. 31.4 g Consider the reaction 4As + 3O2 =

asked by Annalie on May 6, 2010
78. ## High School Chemistry

Explain the reaction mechanism of the following reaction by showing the types of bond splitting and atom rearrangements. C + O2 = CO2

asked by Elijah Bowie on November 20, 2011
79. ## chemistry

Explain why the rate of a simple chemical reaction such as NO(g)+1/2O2(g)=NO2(g) is likey to be most rapid at the beginning of the reaction.

asked by Kim on May 3, 2010
80. ## Chemistry

Consider the reaction: 2CO2(g)=2CO(g) + O2(g). A reaction mixture in a 5.0 L flask at a certain temperature. At equilibrium there are 85 g of CO2(g), 1.20 g of CO, and 0.688 g of O2(g). Calculate Kc.

asked by Ariel on February 27, 2011
81. ## Chemistry

A reaction yields 3.75 L of nitrogen monoxide. The Volume is measured at 19 *C and a pressure of 1.10 atm. What mass of NO was produced by the reaction?

asked by CHEMMY on April 9, 2012
82. ## Chemistry

Consider the reaction: 2CO2(g)=2CO(g) + O2(g). A reaction mixture in a 5.0 L flask at a certain temperature. At equilibrium there are 85 g of CO2(g), 1.20 g of CO, and 0.688 g of O2(g). Calculate Kc.

asked by Ariel on February 27, 2011
83. ## Science!

1) Which of the following is true about photosynthesis? A. it is an exothermic reaction B. it is an endothermic reaction C. It produces carbon dioxide D. it occurs in animals I think it's A.

asked by Anonymous on February 24, 2016
84. ## Chemistry

Consider the reaction: 2CO2(g)=2CO(g) + O2(g). A reaction mixture in a 5.0 L flask at a certain temperature. At equilibrium there are 85 g of CO2(g), 1.20 g of CO, and 0.688 g of O2(g). Calculate Kc.

asked by Ariel on February 27, 2011
85. ## Chemistry

For the reaction HCONH2(g) -->

asked by Kevin on May 30, 2018
86. ## chemistry

True or False? An equilibrium constant K_c=1x10^7 for a reaction indicates that the reaction favors product formation.

asked by Sheila on May 2, 2010
87. ## Chemistry

Explain the reaction mechanism of the following reaction by showing the types of bond splitting and atom rearrangements. C + O2 = CO2

asked by Elijah Bowie on November 20, 2011
88. ## chemistry

Explain the reaction mechanism of the following reaction by showing the types of bond splitting and atom rearrangements. C + O2 = CO2

asked by Elijah Bowie on November 20, 2011
89. ## chemistry

A certain reaction has an activation energy of 74.38 kJ/mol. At what Kelvin temperature will the reaction proceed 7.00 times faster than it did at 313 K?

asked by HELP PLEASE on March 24, 2012
90. ## chemistry

A certain reaction has an activation energy of 74.38 kJ/mol. At what Kelvin temperature will the reaction proceed 7.00 times faster than it did at 313 K?

asked by HELP PLEASE on March 24, 2012
91. ## Science

Which of the following is true about photosynthesis? 1). it is an exothermic reaction. 2). it is an endothermic reaction. 3). it produces carbon dioxide . 4). it occurs in animal.

asked by Leo the Lion on October 8, 2018
92. ## Chemistry

the reaction of 6.62g of carbon with excess oxygen yields 13.40g of CO2. what is the percent yield of this reaction

asked by Kelly on May 18, 2013
93. ## chemistry

A certain reaction has an activation energy of 27.34 kJ/mol. At what Kelvin temperature will the reaction proceed 3.50 times faster than it did at 335 K?

asked by Anonymous on February 28, 2013
94. ## Chemistry

in a particular redox reaction, Cr is oxidized to CrO42- and Ag+ is reduced to Ag. Complete and balance the equation for this reaction in acidic solution.

asked by Anonymous on December 4, 2015
95. ## Chemistry

When K is measured for a reaction, the values obtained are 3.1 at 25°C and 7.42 at 35°C. Using the equation lnK=-(∆H°/R)(1/T)+(∆S°/R) (in the form y=mx+b) calculate ∆H° and ∆S° for the reaction PbCl2(s) --> Pb2+(aq) + Cl-(aq)

asked by sea lively on August 14, 2018
96. ## Chemistry

When K is measured for a reaction, the values obtained are 3.1 at 25°C and 7.42 at 35°C. Using the equation lnK=-(∆H°/R)(1/T)+(∆S°/R) (in the form y=mx+b) calculate ∆H° and ∆S° for the reaction PbCl2(s) --> Pb2+(aq) + Cl-(aq)

asked by sea lively on August 13, 2018
97. ## Chemistry

When K is measured for a reaction, the values obtained are 3.1 at 25°C and 7.42 at 35°C. Using the equation lnK=-(∆H°/R)(1/T)+(∆S°/R) (in the form y=mx+b) calculate ∆H° and ∆S° for the reaction PbCl2(s) --> Pb2+(aq) + Cl-(aq)

asked by sea lively on August 14, 2018
98. ## Chemistry

A certain reaction has an activation energy of 58.80 kJ/mol. At what Kelvin temperature will the reaction proceed 6.50 times faster than it did at 303 K?

asked by Sam on February 2, 2015
99. ## Chemistry

Is there a reaction between Sodium Acetate and Copper (II) Nitrate. If so, what is the balanced equation for it? Also, what type of reaction is it does it form a precipitate?

asked by Cj on October 18, 2014
100. ## chemistry

Which term has the same numerical value for the forward reaction as it has for the reverse reaction, but with opposite sign? a. ^E ( delta E) b. Ea1 c. Ea’ d. Ea2

asked by mona on December 13, 2014