# 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

23,145 results, page 13
1. ## CHEMISTRY

find the concentrations of H+, HCO3-, CO3 2- in a 0.025M in H2CO3 solutions

asked by ADAM on February 22, 2016
2. ## Physics

Sasha is driving straight and notices an antelope in the road a ways off. Determine the stopping distance (from the time she sees the antelope) for her car with an initial speed of 95 km/hr and an acceleration of -4.0 m/s2. Sasha's reaction time to start

asked by Jay on January 24, 2017
3. ## Physics (9th)

Sasha is driving straight and notices an antelope in the road a ways off. Determine the stopping distance (from the time she sees the antelope) for her car with an initial speed of 95 km/hr and an acceleration of -4.0 m/s2. Sasha's reaction time to start

asked by Jay on January 24, 2017
4. ## chem

For a double replacement reaction to occur, is it that one of the products must be insoluble and form a solid? There has to be some mechanism to remove the products from the reaction so that the reaction does not proceed in the reverse direction. Product

asked by Amie on March 19, 2007
5. ## Chemistry

Enough of a monoprotic acid is dissolved in water to produce a 0.0195 M solution. The pH of the resulting solution is 6.24. Calculate the Ka for the acid. Also, the answer is not 1.7 * 10 ^ -11 The response is: You treated the initial concentration as 0.

asked by chem1 on April 22, 2012
6. ## science

What can happen to the reaction rate of a system that is heated and then cooled? Your question isn't quite clear; however, reaction rates increase, generally, with increase in T and decrease with decrease in T. Another way to interpret the problem is that

asked by Shandra on April 16, 2007
7. ## Chem

I just need to know if I did the problem correctly. The decomposition of phosphine, a very toxic gas, forms phosphorus and hydrogen in the following reaction: 4PH3(g) → P4(g) + 6H2(g) If the instantaneous rate of the reaction with respect to PH3 is -0.41

asked by Anonymous on January 29, 2015
8. ## Science

Which of the following best describes the result of using a catalyst in a chemical reaction? A. The yield of product is increased. B. A more desirable product is often formed. C. A greater amount of heat energy is released by the reaction. D. The reaction

asked by Mary on January 19, 2016
9. ## Chem

With which of the following will the weak acid HCHO2 react? If a reaction occurs, write the balanced molecular equation. If no reaction occurs write the left half of the reaction and use "NR". Do not include physical states in your answers. KOH: NH3:

asked by Colt on November 1, 2011
10. ## chemistry

In general, reaction rates double when the temperature is increased by 10ºC. The temperature of a reaction is increased by 40ºC. The rate of the reaction will increase by a factor of ____? is it 16?

asked by tycoon on January 9, 2011
11. ## Chemistry

The theoretical yield of water in the following reaction is calculated to be 149.4 g. If 123.1 g of water were collected after the reaction has gone to completion what is the percent yield of the reaction? Show your work.

asked by Cam on January 16, 2019
12. ## chem

true or false?? a)If there are no changes in the oxidation state of the reactants or products of a particular reaction, that reaction is a redox reaction. false? b)A reducing agent gets oxidized as it reacts. true?

asked by Rebekah on May 3, 2011
13. ## chemistry

Given overall reaction: P4 + 10Cl2 ---> 4PCl5 Delta H for the reaction = ? PCl5 -----> PCl3 + Cl2 Delta H = +157 kJ P4 + 6Cl2 ----> 4PCl3 Delta H = -1207 kJ Calculate the Delta H for the overall reaction.

asked by John on March 31, 2016
14. ## reaction rate help

In general, reaction rates double when the temperature is increased by 10ºC. The temperature of a reaction is increased by 40ºC. The rate of the reaction will increase by a factor of ____? is it 16?

asked by tycoon on January 9, 2011
15. ## Chemistry

What are the correct and accurate products for the following ion combination reaction? Then write the ionic form of the reaction and the net ionic form of the reaction. K2CO3 + CaCl2 ->

asked by Emily on April 7, 2015
16. ## Physics

For non-ideal oscillators (such as a real pendulum) energy is lost and the amplitude (which is the maximum displacement) is no longer constant but also decreases with time. How fast the energy lost is described by a TIME CONSTANT, τ = m/b. Typically after

asked by Ike on January 31, 2014
17. ## physics

ll is thrown vertically upward with an initial speed of 16 m/s. Then, 0.65 s later, a stone is thrown straight up (from the same initial height as the ball) with an initial speed of 27 m/s. How far above the release point will the ball and stone pass each

asked by safari on September 18, 2013
18. ## physics

ll is thrown vertically upward with an initial speed of 16 m/s. Then, 0.65 s later, a stone is thrown straight up (from the same initial height as the ball) with an initial speed of 27 m/s. How far above the release point will the ball and stone pass each

asked by safari on September 18, 2013
19. ## physics

A first object is thrown vertically upward with some initial speed and some initial height above the ground. Simultaneously, a second object is thrown straight down with the same initial speed and same initial height above the ground. Before the second

asked by jake on August 24, 2010
20. ## physics

A shell is fired from the ground with an initial speed of 1.53 ✕ 103 m/s at an initial angle of 55° to the horizontal.

asked by jessica on October 16, 2014
21. ## physics

A ball is thrown vertically upwards and returns to its initial position in 6.0 second. What is its initial speed

asked by afiqa on June 19, 2014
22. ## Physics

Bryant is fired from a cannon with an initial speed of 14 m/s. If his mass is 80 kg what is his initial kinetic energy?

asked by Becky on March 21, 2012
23. ## AP Calculus AB

An object has a constant acceleration of 40 ft/sec2, an initial velocity of -20 ft/sec, and an initial position of 10 ft

asked by Vikram on March 23, 2016
24. ## chemistry

1(a) when 25.0ml of 0.500 mol.dm3 H2SO4(AQ) SOLUTION IS added to 0.025dm3 of 1.00 moldm3 KOH SOLUTION , THE TEMPERATURE OF THE REACTION MIXTURE RISES FROM 23.50 CELCIUS TO 30.17 CELCIUS . THE SPECIFIC HEAT CAPACITY AND DENSITY OF WATER 4.20j.g.celcius and

asked by mustafe on February 9, 2012
25. ## Chemistry

The standard free energy of activation of a reaction A is 73.4 kJ mol–1 (17.5 kcal mol–1) at 298 K. Reaction B is one million times faster than reaction A at the same temperature. The products of each reaction are 10.0 kJ mol–1 (2.39 kcal mol–1)

asked by Breauna on September 8, 2014
26. ## Equilibrium

The following reaction has an equilibrium constant (Keq) of 160. 2 NO2(g) 2 NO(g) + O2(g) What will be the reaction quotient (Q) and in which direction will the reaction proceed if the partial pressure of NO2 is 5.0*10^-4 atm, NO is 0.080 atm, and O2 is

asked by Tyler on August 3, 2015
27. ## Math

Find the specific solution for the following differential equations: a) (dy/dx)^2 - x^4 = 0 given the initial value y(1) = 0 b) dy/dx = ysinx given the initial value y(pi) = 1

asked by Alice on November 9, 2008
28. ## chemistry

Consider the reaction 2 NO2 (g) ⇌ 2 NO (g) + O2 (g). If the initial partial pressure of NO2 (g) is 3.0 bar, and x is the equilibrium pressure of O2 (g), what is the correct equilibrium relation?

asked by lee on March 22, 2015
29. ## Physics

in an impulse/ change in momentum problem where mv(final)-mv(initial)=Ft if the initial velocity is zero can i cancel out the masses?

asked by Emily on April 10, 2012
30. ## Physics

A projectile is fired with an initial speed v0 at t = 0. The angle between the initial velocity v0 and the horizontal plane is . x y v0 yma

asked by Maxx on October 3, 2011
31. ## hh

When the baseball is shot straight upward with an initial speed of 20 \rm m/s, what is the maximum height above its initial location?

asked by aa on July 14, 2012
32. ## chemistry

The reaction SO2 + H2O =H2SO4 Is the last step in the commercial production of sulfuric acid . the enthalpy change for this reaction is -227 KJ . In designing a sulfuric acid plant is it necessary to provide for heating or cooling of the reaction mixture ?

asked by mathew on November 12, 2014
33. ## chemistry

Examine the scenario. Chemical Reaction A and Chemical Reaction B involve the same two reactants. Chemical Reaction A is performed in a hot container, while Chemical Reaction B is performed in a cold container. Which of the answer choices correctly

asked by PLEASE help on September 5, 2017
34. ## PHYSICS Collision of two Balls Momentum!! HELP

A ball A of mass .202 kg is moving at a velocity of 2.0 m/s toward a ball B that is at rest. (a) Calculate the initial momentum for Ball A and Ball B. (b) Calculate initial Kinetic energy for Ball A and Ball B. My doubt since its asking for initial moment

asked by Pam on April 11, 2016
35. ## PHYSICS Momentum!! Collision HELP

A ball A of mass .202 kg is moving at a velocity of 2.0 m/s toward a ball B that is at rest. (a) Calculate the initial momentum for Ball A and Ball B. (b) Calculate initial Kinetic energy for Ball A and Ball B. My doubt since its asking for initial moment

asked by Pam on April 12, 2016
36. ## Physics

A projectile is shot from the ground at an angle of 60 degrees with respect to the horizontal, and it lands on the ground 5 seconds later. Find: a. the horizontal component of initial velocity b. the vertical component of initial velocity c. initial speed

asked by nam maurer on November 23, 2011
37. ## Physics

A projectile is shot from the ground at an angle of 60 degrees with respect to the horizontal, and it lands on the ground 5 seconds later. Find: a. the horizontal component of initial velocity b. the vertical component of initial velocity c. initial speed

asked by nam maurer on November 22, 2011
38. ## Chem

K so this time it is basic concept and I am suppose to guess what happens, so I've written the cause but I have also written my answer to the reaction and effect. so for: A + B C stress: A is increased reaction: forward effect:[A]increased [B] inc [C]inc

asked by Jason on May 16, 2007
39. ## chemistry help

For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants? 2Na(s)+Br2(g) ---->2NaBr(s) 1. 2mol Na, 2mol Br2 2. 1.8mol Na, 1.4mol Br2 3. 2.5mol Na, 1mol Br2 4. 12.6mol Na, 6.9 mol Br2

asked by Kimmie on September 24, 2014
40. ## AP Chemistry

I have no idea where to start with this problem: A certain reaction has the following general form: aA -> bB At a particular temperature and (A)o = 2.00(10^-2)M, concentration versus time data were collected for this reaction, and a plot of In(A) versus

asked by Shawn on December 8, 2009
41. ## Ap Chemistry

I have no idea where to start with this problem: A certain reaction has the following general form: aA -> bB At a particular temperature and (A)o = 2.00(10^-2)M, concentration versus time data were collected for this reaction, and a plot of In(A) versus

asked by Shawn on December 8, 2009
42. ## Calc

The temperature of a chemical reaction, t seconds after the reaction starts, is given by: T(t)= 20+5.25t^.75 degrees F , What is the average temperature during the whole process, if the reaction lasts for 4 minutes and 16 seconds ?

asked by Rebekah on February 9, 2014
43. ## chemistry

A reaction is first order and it takes 324 minutes for the reaction to be 50.0% complete. How long will it take for the reaction to be 85.0% complete at the same temperature? The answer is 887 minutes but I have no idea how he got that? help

asked by csb on October 6, 2010
44. ## CHEMISTRY

1. Give reasons for your choice. 2. Give reasons for rejecting other options. The reaction C(s) + O2(g) CO2(g) + heat reaches equilibrium in a closed reaction vessel. Which one of the following actions causes the equilibrium to shift to the right ? A

asked by Anonymous on November 27, 2017
45. ## Chemistry

The following reaction mechanism has been proposed for a reaction: (slow) NO2 + NO2-> NO3 + NO (fast) NO3 + CO -> CO2 + NO2 A. Write the equation for the overall reaction from the mechanism above. B.Write the rate law for the reaction

asked by Michael on January 20, 2011
46. ## Chemistry

The following reaction mechanism has been proposed for a reaction: (slow) NO2 + NO2-> NO3 + NO (fast) NO3 + CO -> CO2 + NO2 A. Write the equation for the overall reaction from the mechanism above. B.Write the rate law for the reaction

asked by Michael on January 20, 2011
47. ## Chemistry

The following reaction mechanism has been proposed for a reaction: (slow) NO2 + NO2-> NO3 + NO (fast) NO3 + CO -> CO2 + NO2 A. Write the equation for the overall reaction from the mechanism above. B.Write the rate law for the reaction

asked by Michael on January 20, 2011
48. ## chem plzzz help

okay so im doing pre lab questions on reaction rates I have a chart labeled effects of varying concentration in reaction #1 flask A contains 7.50mL of .200 M KI , none of .20M KCI, 5.00 mL of .0050 M S2O3^2-, 1 drop of starch. Flask B contains 7.5mL of

asked by Anna on February 15, 2009
49. ## College algebra

When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -5t^2 + v*t + k gives the height of the ball at any time, t in seconds, where “v” is the initial velocity (speed) in meters/sec and “k” is the initial height

asked by Dimpleface on June 16, 2010
50. ## AP CHEM-- check work?

How many moles of ATP must be converted to ADP by the reaction ATP(aq) + H2O ---> ADP(aq) + HPO4-2(aq) + 2H+(aq) delta-G*= -31 kJ to bring about a nonspontaneous biochemical reaction in which delta-G*= +372 kJ? I did my work out like this..: 372 kJ x 1

asked by janelle on April 15, 2007
51. ## Physics

A soccer ball is kicked with the initial speed of 10.7m/s . After 0.780s it is at its highest point. What was its initial direction of motion?

asked by Roxy on September 2, 2013
52. ## Physics

A soccer ball is kicked with an initial speed of 12.2 m/s. After 0.497 s it is at its highest point. What was its initial direction of motion?

asked by Robert C on December 8, 2009
53. ## physics

x=x0+v0t+1/2at^2. Assuming that x0=0, a=2, and x=h, solve for t in terms of initial v and h? x0 mean initial value of x same with v0

asked by Joseph on June 8, 2012
54. ## Chemical Kinetics

The kinetics of the catalytic decomposition of NH3 into N2 and H2 on a hot tungsten filament at 1100 °C was investigated by Kunsman. He measured the times (t1/2) required for half of NH3 to decompose at different initial NH3 pressures, as shown below: P

asked by Teddy on May 3, 2010
55. ## Chemistry

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!

asked by David on May 5, 2016
56. ## chemistry

Calculate the concentrations of all species present in a 0.32 M solution of ethylammonium chloride (C2H5NH3Cl).

asked by timothy on October 16, 2011
57. ## Chemistry

Calculate the percent ionization of benzoic acid at the following concentrations: 0.00014 M i got 68% but it says its wrong

asked by Spencer on February 14, 2009
58. ## Science

Do you know at what level PCE concentrations are of concern? Is 8,300 PPB a major problem?

asked by Marissa on March 3, 2010
59. ## Chemistry

The solubility products of Fe(OH)2 and Fe(OH)3 are 10^-17 and 10-38 respectively. If the concentrations of Fe2+ and Fe3+ are each 10^-5, at what pH will each hydroxide just begin to precipitate?

asked by Yui on April 24, 2018
60. ## CHEMISTRY

Assuming equal concentrations , rank these solutions by pH. RbOH(aq), NH3(aq), HF(aq) HBr(aq), Ca(OH)2(aq).

asked by Nia on October 17, 2011
61. ## Chemistry

Nitrogen and oxygen can react directly with one anotheer to produce nitrogen dioxide according to N2(g) + 2O2(g) --> 2NO2(g) The reaction may also be imagined to take place by first producing nitrogen oxide N2(g) + O2(g) --> 2NO(g) which then produces NO2

asked by Sarah on November 12, 2015
62. ## Chemistry

HELP! we just started kinetics and i have no clue how to solve this problem. For the reaction between reactants A and B below, if 4.925 moles of A is placed into a flask with excess B it is found that the amount of A remaining after 6.85 seconds is 2.737

asked by Jonathan on February 20, 2008
63. ## physics

A soccer ball is kicked from the ground with an initial speed of 14.5 m/s. After 0.272 seconds, ts speed is 12.4 m/s. (A) Give a strategy that will allow you to calculate the ball's initial direction of motion. (B) Use your strategy to find the initial

asked by Mima on September 16, 2012
64. ## physics

An ideal gas has an initial volume of 500 cm3 , an initial temperature of 20◦C, and an initial pressure of 2 atm. What is its final pressure if the volume is allowed to expand to 1000 cm3 while the temperature increases to 60◦C?

asked by khalifah on March 29, 2015
65. ## Chemistry

Ethane, C2H6, forms ·CH3 radicals at 700.°C in a first-order reaction, for which k = 1.98 h-1. (a) What is the half-life for the reaction? (b) Calculate the time needed for the amount of ethane to fall from 1.00 10-3 mol to 2.48 10-4 mol in a 500. mL

asked by Sara on June 28, 2013
66. ## Physics

Initial Statement: A soccer ball is kicked with an initial horizontal velocity of 15 m/s and an initial vertical velocity of 14 m/s. 1) What is the initial speed of the ball? 20.518 2) What is the initial angle θθ of the ball with respect to the ground?

asked by Aidan on August 28, 2016
67. ## AP Chemistry

For the system 2SO2(g) + O2(g) 2SO3 (g), change in enthalpy is negative for the production of SO3. At a particular temperature, 8.00 moles of sulfur dioxide and 10.00 moles of sulfur trioxide are introduced into a 2.00 L container. The system is allowed to

asked by S on January 12, 2008
68. ## Chemistry

Cyclobutane consisting of molecules in which four carbon atoms form a ring decomposes when heated to give ethylene. The reaction is first order. In an experiment, the initial concentration of cuclobutane was 0.00150M. After heating at 450 degrees C for

asked by Sam on February 24, 2008
69. ## Chemistry

Cyclobutane consisting of molecules in which four carbon atoms form a ring decomposes when heated to give ethylene. The reaction is first order. In an experiment, the initial concentration of cuclobutane was 0.00150M. After heating at 450 degrees C for

asked by Sam on February 23, 2008
70. ## Calculus

In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of

asked by Katrina on April 10, 2011
71. ## physics

A projectile is fired through the air. It is launched from the ground, and travels without interference from wind or air resistance, landing on a raised platform above the field. Compare the following values: 1-Initial speed vs. final speed: 2-Initial

asked by Din123 on June 23, 2013
72. ## Chemistry - check answer

A 20.0 L reaction vessel contains 0.016 moles CO2, 1.05 moles of CO, and 2.00 moles of C. The mixture is approaching the following equilibrium: CO2(g) + C(s) 2CO(g) a) Calculate the reaction quotient Q. b) If value of K is 1.17, predict which direction the

asked by Amanda on April 20, 2014
73. ## Science

1. what is a single replacement reaction A. A reaction in which two or more substances react to form a single substance*** B. A reaction in which one element takes place the place of another element in a compound. C. A reaction in which a compound breaks

asked by Jason on November 14, 2017
74. ## physics

An object with mass of 7kg was thrown down with initial velocity 10m/s and reached the ground in 10s. What was the the initial height

asked by ******tasha****** on March 9, 2012
75. ## chemistry

What change do you expect if the value of the reaction quotient is greater than the value of the equilibrium constant? A. The rate of the forward reaction is greater than the rate of the reverse reaction. More reactant forms. B. The rate of the forward

asked by jessie on September 12, 2016
76. ## chemistry

What mass of benzoic acid can be made from a reaction where 4.87g benzyl alcohol is combined with 300mL of bleach? The reaction is conducted in water and dichloromethane. Describe a method of separating the benzoic acid from the sodium chloride byproduct

asked by Chad on February 8, 2010
77. ## Chemistry

Consider the reaction N2(g)+3H22NH3(g). What is the effect of decreasing the volume on the contained gases The reaction shifts toward the product gas The system reacts by increasing the number of gas molecules*** the pressure on the gases decreases

asked by Jordan on May 4, 2016
78. ## chemistry

What mass of benzoic acid can be made from a reaction where 4.87g benzyl alcohol is combined with 300mL of bleach? The reaction is conducted in water and dichloromethane. Describe a method of separating the benzoic acid from the sodium chloride byproduct

asked by Linda on February 7, 2010
79. ## chemistry

Please help! N2H4 is decomposed in a closed container according to this reaction: N2H4 → N2 + 2H2 . If the temperature is constant and the initial pressure of N2H4 is 800mm, what will the pressure in millimeters be after the decomposition to N2 + 2H2?

asked by Anonymous on April 21, 2017
80. ## Engineering Physics

A car and a train move together along straight, parallel paths with the same constant cruising speed v(initial). At t=0 the car driver notices a red light ahead and slows down with constant acceleration -a(initial). Just as the car comes to a full stop,

asked by Andrew Rozmarynowycz on September 16, 2009
81. ## Chemistry

1) Using a table of standard electrode potentials (such as the one in your textbook), calculate the standard cell potential for a cell made by placing a zinc electrode in a Zn2+(aq) solution which is connected by an electrolyte to a Ag+(aq) solution

asked by CHEM HELP ASAP on May 13, 2014
82. ## Math

Recall that the equation for the horizontal distance h in feet of a projectile with initial velocity v0 and initial angle theta is given by h=v0^2/16 sin theta cos theta . a. Assume the initial velocity is 60 ft/second. What initial angle will you need to

asked by LISA on December 6, 2013
83. ## Chemistry

Why these answers are so? 1- For this reaction 2H2 + O2 = 2H2O a- dela H=delta Hf b-delta Hc= delta Hf c- delta H= delta Hc d- delta S= delta H and the answer is b , but how and why? 2- For this reaction 2S + 3O2 = 2SO3 + 792 kJ which of the following

asked by Omed on February 13, 2019
84. ## Chemistry!!!!

1. For a reaction mechanism to be plausible, what 2 criteria must be met? 2. The reaction between CO and NO2 to produce NO and CO2 is thought to occur in 2 steps. NO2 + NO2 ====> NO + NO3 NO3 + CO =====> NO2 + CO2 The experimental rate law is, R=k[NO2]2

asked by Michelle on February 12, 2015
85. ## Chemistry!!!!

1. For a reaction mechanism to be plausible, what 2 criteria must be met? 2. The reaction between CO and NO2 to produce NO and CO2 is thought to occur in 2 steps. NO2 + NO2 ====> NO + NO3 NO3 + CO =====> NO2 + CO2 The experimental rate law is, R=k[NO2]2

asked by Michelle on February 12, 2015
86. ## chemistry

The reaction described by this equation O3(g) + NO(g) -- O2(g) + NO2(g) has the following rate law at 310 K. rate of reaction = 3.0x10^6 M^-1 s^-1)[O3][NO] Given that [O3]=2.0× 10–4 M and [NO]=2.0× 10–5 M at t=0, calculate the rate of the reaction at

asked by Katie on March 23, 2012
87. ## Plzz help me

the reaction BrO3- + 3SO3 2- ---> has the rate law r= k[BrO3-][SO3 2-]. what is the order of the reaction with the respect to each reactant? wat s the overall order of the reaction?

asked by Tarkan on November 10, 2011
88. ## Chemistry

I need definitions for chemistry and I can't come up with any heterogeneous reaction homogeneous reaction activation energy activation energy activated complex elementary reaction

asked by Al on March 16, 2015
89. ## chemistry

Does an insoluble solid dissociate into ions? Is the reaction reversible? Will an equilibrium reaction form when a chemical reaction forms an insoluble solid? Why, or why not?

asked by Anonymous on April 23, 2012
90. ## Heeelllppp in chemistry plzzzz

the reaction BrO3- + 3SO3 2- ---> has the rate law r= k[BrO3-][SO3 2-]. what is the order of the reaction with the respect to each reactant? wat s the overall order of the reaction?

asked by Tarkan on November 10, 2011
91. ## chemistry

(AAAAA)The standard reduction potentials of lithium metal and chlorine gas are as follows: (for Li, reduction potential is -3.04, for Cl it is 1.36) In a galvanic cell, the two half-reactions combine to 2Li{+](s) + Cl{-}2(g) --> 2Li{+}Cl{-}(aq) Calculate

asked by lili on April 28, 2011
92. ## Chemistry

Just a few questions about rates of reaction. A) Why are the units for average and instantaneous rates the same? -because they are both measures of how quickly a reaction is occuring per unit time B) For a given set of data, two students determined

asked by Jamie on May 16, 2010
93. ## chemistry

sodium metal reacts with hydrogen gas to yield solid sodium hydride ( NaH ). A reaction mixture contains 10.00 g sodium metal and 0.235 g of hydrogen gas. write a balanced chemical equation for this reaction? what is your limiting reactant? what is your

asked by Sofia on July 19, 2018
94. ## chemistry

CH3OH(g) ----> CO(g) + 2H2 (g) (delta H =+90.7k) A) is heat absorbed or released in the course of this reaction? b) calculate the amount of heat transferred when 45.0g of CH3OH(g)is decomposed by this reaction at constant pressure. c) for a given sample of

asked by Anna on October 17, 2011
95. ## physics

a ball is thrown at an initial angle of 37 and initial velocity of 23.0 m/s reaches a maximum height h, as shown in the Figure. With what initial speed must a ball be thrown straight up to reach the same maximum height h?

asked by Anonymous on January 3, 2011
96. ## Chemistry

2A + B2 + C --> A2B + BC Run # Initial Rate (M-1s-1) (A)o (B)o (C)o 1 1.6 x 106 1.2 M 1. x 10-2 M 1.0 M 2 1.6 x 106 2.4 M 1. x 10-2 M 1.0 M 3 3.2 x 106 1.2 M 2. x 10-2 M 1.0 M 4 6.4 x 106 1.2 M 1. x 10-2 M 2.0 M What would be the rate-law expression of the

asked by Marcus on February 17, 2013
97. ## Finance

what is the initial rate of return for the following project: An initial outlay of 9,500 resulting in a single cash flow of 16,281 in 7 years

asked by Tremeta on September 9, 2015
98. ## Physics

2)Identify the initial and final states if an electron in hydrogen emits a photon with a wavelength of 1282.0 nm. Enter the initial state first

asked by Sandhya on April 13, 2008
99. ## College Physics

A single resistor is wired to a battery.Define the total power dissipated by this circuit as P initial. What is the power, in terms of P initial, dissipated by this circuit? Power = P initial.

asked by Lanise on February 6, 2010
100. ## Chemistry

Part 1 of 2 Write the balanced molecular equation for the reaction between iron metal (the nail) and aqueous copper II sulfate and classify this reaction. Include the states: solid (s), liquid (l), aqueous (aq), or gas (g). Use your observations to help

asked by Richard on January 11, 2015