# 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

23,099 results, page 90-
## Chemistry

What type of reaction is photosynthesis, the process where carbon dioxide combines with water to form glucose in the presence of sunlight?

*asked by josie on June 18, 2014* -
## chemistry

Given the following data: 4PCl5(s) ¨ P4(s) + 10Cl2(g) ƒ¢H = +1774 kJ P4(s) + 6Cl2(g) ¨ 4PCl3(l) ƒ¢H = -1278.8 kJ Find the ƒ¢H of the following reaction: PCl5(s) ¨ PCl3(l) + Cl2(g)

*asked by Hi on March 4, 2015* -
## chemistry

Complete, Balance and classify the chemical reaction....please help do not understand A)Li(s)+AuCL3(aq)-> B)AL(NO3)(aq)+K2CO3(ag)-> C)Ba(s)+F2(g)-> D)SnCI2(aq)+Na3PO4(aq)-> E)Na+AICI3(s)->

*asked by twynna on February 28, 2011* -
## Chemistry

What happens if sodium acetate (CH3COONa) is added to the following reaction? CH3COOH H+ + CH3COO- a) [H+] increases b) [H+] decreases c) a precipitate is formed d) [H+] does not change

*asked by scilover on May 20, 2013* -
## chemistry

Use Hess's Law and a table of heats of formation to determine the enthalpy for the following reaction. 3SO2(g) + 3H2O(g) + 3/2O2(g) --->3H2SO4(l) ΔH = ?

*asked by korko on September 28, 2014* -
## chem

Consider the chemical reaction, 2Al + 3Cl2 → 2AlCl3. Here, 56 g of Al can produce 415.14 g of AlCl3 (Molar masses: Al = 26.98 g; Cl = 35.45 g). true or false

*asked by bekah on October 5, 2014* -
## Chemistry

What mass of precipitate will form if 1.50 L of concentrated Pb(ClO3)2 is mixed with 0.750 L of 0.170 M NaI? Assume the reaction goes to completion.

*asked by bella on February 17, 2013* -
## chem

Given: 3H2(g) + N2(g) 2NH3(g) If the reaction starts with 0.500 mol of H2, how many atoms of hydrogen in the compound NH3 would you expect to make?

*asked by kp on February 14, 2010* -
## chemistry

Use Hess's Law and a table of heats of formation to determine the enthalpy for the following reaction. 3SO2(g) + 3H2O(g) + 3/2O2(g) --->3H2SO4(l) ΔH = ?

*asked by korko on September 28, 2014* -
## english

Select the vocabulary word that best completes the sentence. Most people learn best when they can follow a(n) _[blank]_. example influence state reaction A?

*asked by Bri on August 1, 2018* -
## Chemistry

Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Cr2 ] = 0.875 M and [Ni2 ] = 0.0100 M. I keep on getting the answer .42 which is incorrect. Thank you so much in advance!

*asked by Julia on April 24, 2017* -
## chemistry characterization & analysis of aspirin

write a balanced equation that describes an acid base reaction that would allow you to determine the moles of aspirin present in a sample

*asked by molly on November 13, 2012* -
## Genral Science

What C word defines a substance that speeds a chemical reaction without being consumed? http://en.wikipedia.org/wiki/Catalysis

*asked by stuart on March 28, 2007* -
## Chemistry

Consider this reaction N2g+O2g+2NOg H=180.5kj How much heat would be required to produce 1.300 mol NOg?

*asked by Sarah on May 19, 2016* -
## Chemistry

what mass of water will be formed by reaction of 3.50g of methylamine (8CH3NH2) with 15.0g of perchloric acid (13HClO4)? Answer is 99.1. How do you work this?

*asked by Michelle on November 7, 2012* -
## 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

*asked by Katie Y. on November 2, 2009* -
## strength of materials

Bar BC in the figure has length L, constant cross sectional area A, and is composed of a homogeneous material with modulus E. The bar is fixed between walls at B (x=0) and C (x = L). The bar is subjected to a variable distributed load per unit length,

*asked by ashwni on July 17, 2016* -
## Physics

Bar BC in the figure has length L, constant cross sectional area A, and is composed of a homogeneous material with modulus E. The bar is fixed between walls at B (x=0) and C (x = L). The bar is subjected to a variable distributed load per unit length,

*asked by skrillex on July 17, 2016* -
## Supervision and leadership

What Should I Do Next? What Should I Do Next? Kim Allred is relatively new as a supervisor, having been promoted only two months ago. Before her promotion, she had worked for the company for seven years as a sales specialist in office equipment. There is

*asked by Ree on April 24, 2008* -
## physics

While on the moon, the apollo astronauts enjoyed the effects on gravity so much smaller then that ont he earth. If neil armstrong jumped up on the moon with the initial speed

*asked by Casey on April 19, 2011* -
## Physics- Projectiles

A marlin jumps out of the water with an initial velocity of 5.0 meters per second at an angle of 80 degrees above horizontal. Approximately what maximum height will the marlin reach during it's flight?

*asked by Olivia on October 25, 2012* -
## Science

A football is thrown upward at 34 degrees angle to the horizontal. The acceleration of gravity is 9n8. To throw the ball a distance 66.7m what must be the initial speed of the ball

*asked by Anonymous on November 2, 2018* -
## Physics

A car drove a total 5km. Accelerated 10seconds then had a constant velocity. Entire trip was 45 seconds. Was was the initial acceleration and final velocity?

*asked by Tim on January 31, 2011* -
## Physics

A car drove a total 5km. Accelerated 10seconds then had a constant velocity. Entire trip was 45 seconds. Was was the initial acceleration and final velocity?

*asked by Tim on January 31, 2011* -
## chemistry

sorry i forgot some of the units in the initial posting 8.00g of NaOH are dissolved in water to make 4.00L of solution. What is the concentration of hydronium ions, , in this solution?

*asked by katy on November 2, 2009* -
## physics in kinematics

ebo throws a ball in the air it's velocity at the start is 18m/s at an angle of 37° to the ground express the initial velocity in component vector form?

*asked by Na on December 30, 2015* -
## physics

A Bulldog is already moving when we first see it. It waddles -57 meters reaching a final velocity of -28 m/s after accelerating at -4 m/s2. WHAT WAS THE DOG'S INITIAL VELOCITY? Every time I try to use v^2= V0+2a(delta x) I end up getting a very big value.

*asked by Jessica on August 30, 2014* -
## Scientific studies

A toy air rocket is launched vertically with an initial velocity of 22m/s. (a) How long does it take to reach its maximum height (v=0m/s? (b) How long does it take to return to the ground (x-0m)?

*asked by Aly on February 17, 2010* -
## Physics

An object is thrown upwards at an initial speed of 19.6 m/s from a height of 65m. Determine how long will take for the object to reach the ground (time of flight). what formula should i use?

*asked by Anna on August 29, 2012* -
## Physics

An object is freed from the top of the tower at an altitude of 39.2m. At the same time, another substance is thrown at an initial speed of 19.6 m per sec. At what time both the objects and the height of the cave get?

*asked by Krinal on July 14, 2018* -
## Physics

A skateboarder, with an initial speed of 2.4m/s , rolls virtually friction free down a straight incline of length 19m in 3.3 s.At what angle θ is the incline oriented above the horizontal?

*asked by Saku on September 26, 2014* -
## Chemistry

2KClO3 ----> 2KCl + 3O2 Calculate the number of grams of KClO3 decomposed given an initial sample mass of 2.16g and a residue mass of 1.71g?

*asked by Anonymous on October 8, 2012* -
## Physics

A gunman shoots from a riffle in a horizontal direction without correcting for gravity. How much below the intended target, at a horizontal distance, will the bullet strike if its initial speed is Vo??

*asked by Jasalle on March 2, 2011* -
## Physics

A rocket of mass 50 kg is launched vertically. Its fuel is being burnt at a rate of 2 kg s-1 and its exhaust gas is being forced out with a speed of 1000 m s-1. What is the initial acceleration of the rocket?

*asked by okw on September 8, 2016* -
## physics

A flare is fired at an angle of 35 degrees to hit the ground at an initial speed of 250 m/s. How long dies it take for the flare to reach its maximum altitude?

*asked by Anonymous on September 27, 2010* -
## Physics

A rocket leaves the launch pad heading straight up with a constant acceleration of 60 m/s^2 \. its initial stage booster runs out in 25 seconds. How high is the rocket?

*asked by Caden on October 25, 2016* -
## Physics

A golf ball having an initial speed of 50m/s with an angle of 30 degree what is time of flight and range and velocity it which it hits the ground at the end of flight

*asked by Sachin on August 8, 2018* -
## physics

A skier leaves the top of a ski ramp at an angle of 25 degrees with an initial velocity of 10 m/s. The ramp is 60 m high, neglecting air resistance determine:

*asked by T on October 1, 2015* -
## Corprate Finance

An initial investment of $400,000 will produce an end of year cash flow of $480,000. What is the NPV of the project at a discount rate of 20%?

*asked by Karen on April 23, 2010* -
## Physics

A gunman shoots from a riffle in a horizontal direction without correcting for gravity. How much below the intended target, at a horizontal distance, will the bullet strike if its initial speed is Vo??

*asked by Jasalle on March 2, 2011* -
## physics

Suppose 32000 radioactive nuclei are in a sample. About how many remain after two days if the half-life is 22 hrs? What is the initial activity of the sample in decays per minute?

*asked by Anonymous on May 5, 2009* -
## physics

A ball is thrown upward from the ground with an initial speed of 26.2 m/s; at the same instant a ball is dropped from rest from a building 14 m high. After how long will the balls be at the same height?

*asked by Katie on September 20, 2010* -
## Aberdeen

A model rocket is launched straight upward with an initial speed of 40.0 m/s. It accelerates with a constant upward acceleration of 2.50 m/s2 until its engines stop at an altitude of 120 m.

*asked by James on September 21, 2010* -
## Physics

A skateboarder with an initial speed of 3.1-m/s, rolls virtually friction free down a straight incline of length 18-m in 3.2-s. At what angle (in degrees) is the incline oriented above the horizontal?

*asked by james on September 15, 2017* -
## Algebra

An initial investment of $480 is invested for 4 years in an account that earns 16% interest, compounded quarterly. What is the amount of money in the account at the end of the period?

*asked by Cherie on May 7, 2010* -
## physics

An astronaut wearing a 20-kg spacesuit jumps on the moon with an initial velocity of 16 m/s. On the moon, the acceleration due to gravity is 1.62 m/s squared. What is the maximum height he reaches?

*asked by Kelly on October 8, 2013* -
## math

You invest money that pays 6.3% interest/year compounded quarterly. How long should you invest if want to double initial investment? I tried A=P(1+r/n)^nt, but it didn't work, using A=2P. the principle is not given. Please help

*asked by BJ - help please on November 8, 2011* -
## Physics

On piercing a distance of 15cm in a wooden block a bullet losses of its initial velocity before coming to rest the further distance travelled by it is Ans:5cm

*asked by Thousif on January 8, 2018* -
## Physics

3813.75 Joules of work is being done on a 150 lb object while it is moved 75 ft across a horizontal plane, what is the final velocity if the coefficient of kinetic friction is 0.25 and the initial velocity is 1 ft / s?

*asked by Adam - Require some Help Please on May 7, 2014* -
## phyics

Find the horizontal range of a baseball that leaves the bat at an angle of 63 degrees, with the horizontal with an initial velocity of 160 km/hr. discard air resistance

*asked by Brittany on December 15, 2011* -
## physics

3813.75 Joules of work is being done on a 150 lb object while it is moved 75 ft across a horizontal plane, what is the final velocity if the coefficient of kinetic friction is 0.25 and the initial velocity is 1 ft / s?

*asked by Adam on May 7, 2014* -
## Physics

A 0.45-kg soccer ball is kicked at an angle θ above the ground with initial speed vi. Determine the height of the ball as a function of the horizontal distance d it travels down the field.

*asked by Mat on November 1, 2016* -
## Physics

A motorcycle with an initial velocity of 7.99x10^0 m/s accelerates for a total of 3.3x10^0 seconds at a rate of 1.51x10^0 m/s2. What is it's velocity, to two significant figures? can anyone show the calculations for this

*asked by dylan on October 13, 2010* -
## physics

A ball is thrown upward from the ground with an initial speed of 25 m/s; at the same instant, a ball is dropped from rest from a building 15 m high. After how long will the balls be at the same height?

*asked by Shayla on September 20, 2012* -
## Physics

A ball is thrown upward from the ground with an initial speed of 25 m/s; at the same instant, a ball is dropped from rest from a building 15 m high. After how long will the balls be at the same height?

*asked by Shayla on September 20, 2012* -
## Projectile motion

A cannon is fired from a cliff top 15m high and at 30 degrees. It takes 3 seconds for canon to reach the earth, what is the initial velocity of the cannon

*asked by Lorna on October 20, 2013* -
## Chemistry

After the initial 1 mL of 0.2 M FeCl3 (aq) and 1 mL of 0.2 M KSCN (aq) were combined it was then diluted with an additional 130 mL of deionized water. Which way would this dilution cause the equilibrium to shift? Is a dilution going to be a stress in all

*asked by kelly on April 3, 2017* -
## AP Biology

How would I calculate water potential? I have the formula but I can't figure out what to plug in. I only have a data table including initial and final mass of a concentration and the molarity of the concentration.

*asked by anonymous on September 21, 2018* -
## Physics

Two particles each have a mass of 5.5 10-3 kg. One has a charge of +4.8 10-6 C, and the other has a charge of -4.8 10-6 C. They are initially held at rest at a distance of 0.88 m apart. Both are then released and accelerate toward each other. How fast is

*asked by Donald on February 14, 2013* -
## Chemistry

A student mixes two water solutions with an initial temperature of 25 degrees C to form a final substance with a mass of 65 grams at 30 degrees C. What is the heat change in kJ?

*asked by Hannah on December 15, 2010* -
## Physics

Two particles each have a mass of 5.5 10-3 kg. One has a charge of +4.8 10-6 C, and the other has a charge of -4.8 10-6 C. They are initially held at rest at a distance of 0.88 m apart. Both are then released and accelerate toward each other. How fast is

*asked by Anonymous on March 11, 2013* -
## Chemistry

What was the initial temperature of a sample pf silver that released 1207 joules when 150.0 grams of this metal were transferred to a cooler temperature of 60 degress Celsius?

*asked by Michaela on May 15, 2012* -
## Physics

Two particles each have a mass of 5.5 10-3 kg. One has a charge of +4.8 10-6 C, and the other has a charge of -4.8 10-6 C. They are initially held at rest at a distance of 0.88 m apart. Both are then released and accelerate toward each other. How fast is

*asked by Anonymous on February 18, 2013* -
## Physics

*asked by Anonymous on March 11, 2013* -
## Physics

4. A 500-g block is shot up a surface 25° inclined with the horizontal with an initial speed of 200cm/s. How far up the incline will it go if the coefficient of friction between it and the incline is 0.150? Thank youuuu!

*asked by Anonymous on November 3, 2013* -
## Physics

A mass m is traveling at an initial speed of v0 = 25.0 m/s. It is brought to rest in a distance of 62.5 m by a force of 15.0 N. The mass is? Could you just enlighten me on what formula to use please.... little lost although I think the answer is 37.5kg am

*asked by Femfatal on February 13, 2011* -
## physics

A cannonball is fired horizontally from a 240 {m}-high cliff toward a vertical building 720 {m} away with an initial velocity of 120 {m/s}. When the ball will hit the building? in a. 7.00 {s} b. 6.00 {s} c. less than 6.00 {s} d. more than 7.00 {s}

*asked by andrea on January 26, 2011* -
## Physis

An arrow is horizontally projected from the top of a tower with an initial velocity of 15m/s.if it reaches the ground 7seconds later,calculate the height of the tower (let g=10m/s0).

*asked by Sylvester on October 15, 2015* -
## physics

Suppose the ball is kicked horizontally with an initial speed of 9.37m/s. If the ball travels a horizontal distance of distnace 85 meters, how tall is the mountain?

*asked by Brooke on November 14, 2011* -
## Physics

A figure skater glides along the ice at 2.2 m/s , she then accelerates at 1.3 m/s^2 for 3.0 seconds. At the end of that time she is moving at 6.1 m/s. What would be the angle between the acceleration vector and the initial velocity vector? .. please help

*asked by Harold on January 16, 2009* -
## Physics

A stone is thrown vertically upward at an initial speed of 10m/s. Find the total time of the flight and the maximum height reached by the stone.

*asked by Jane on February 8, 2016* -
## Common Core Math II A-CR

A firework is launched into the air from ground level with an initial velocity of 128 ft/s. If acceleration due to gravity is –16 ft/s2, what is the maximum height reached by the firework?

*asked by darian on May 10, 2015* -
## physics

A stone is thrown from ground level at 70m/s. Its speed when it reaches its highest point is 48 m/s. Find the angle, above the horizontal, of the stone’s initial velocity.

*asked by Anonymous on September 30, 2011* -
## Physics

A startled armadillo leaps upward rising .536 m in the first .197 s. What is its initial speed as it leaves the ground? What is its speed at the height of .536m? How much higher does it go?

*asked by Kristen on September 9, 2007* -
## chemistry

assuming that the calorimeter contains 5.00 * 100 g of water and that the initial temperature is 30.0 degree celcius. what will the final temperature be? (use the proper formula and units, and show your work below)

*asked by alice on October 10, 2007* -
## physics

An astronaut wearing a 20-kg spacesuit jumps on the moon with an initial velocity of 16 m/s. On the moon, the acceleration due to gravity is 1.62 m/s squared. What is the maximum height he reaches?

*asked by Kelly on October 8, 2013* -
## physics

A startled armadill leaps upward rising .536 m in the first .197 s. What is its initial speed as it leaves the ground? What is its speed at the height f .536m? How much higher does it go?

*asked by Kristen on September 10, 2007* -
## Physics

A sample of a monatomic ideal gas is originally at 20 °C. Calculate its final temperature of the gas if the pressure is doubled and volume is reduced to one-fourth its initial value.

*asked by Anon on October 15, 2013* -
## Physics

A sample of a monatomic ideal gas is originally at 20 °C. Calculate its final temperature of the gas if the pressure is doubled and volume is reduced to one-fourth its initial value.

*asked by nbi on October 15, 2013* -
## science (physics)

how far will a stone travel over level ground if it is thrown upward at an angle 30 with the horizontal and with a speed of 12m/s?what maximum range could be achieved with the same initial speed?

*asked by tena on June 30, 2016* -
## physics

a pelican flying a horizontal path drops a fish from a height of 5.0m. the fish travels 8.1m horizontaly before it hits the water below. what was the pelicans initial speed?

*asked by gaby on September 27, 2012* -
## Physics

A ball thrown vertically upward is caught by the thrower after 20.0 s. FInd (a)the initial velocity and (b) the maximum height it reaches. All I am given is time. How am I suppose to find (a) and (b)?

*asked by Anonymous on September 12, 2007* -
## last one i promise....physics

A startled armadill leaps upward rising .536 m in the first .197 s. What is its initial speed as it leaves the ground? What is its speed at the height f .536m? How much higher does it go?

*asked by Kristen on September 10, 2007* -
## Physics

A uniform solid ball rolls smoothly along a floor, then up a ramp inclined at 13.5 degrees. It momentarily stops when it has rolled 1.65 m along the ramp. What was its initial speed?

*asked by Kelsey on November 18, 2013* -
## physics

A projectile is shot at a 37 degree angle from the edge of a cliff h = 305 m above ground level with an initial speed of v0 = 125 m/s how much time will it take to hit the ground

*asked by memo on October 9, 2010* -
## math

An initial-value problem is given by the differential equation, f(x,y)=-20xy^2, y(1)=1. Use the classical fourth-order Runge-Kutta method with a step-size of h=0.02, to obtain the approximate value of y(1.02). Give your answer to 6 decimal places.

*asked by enigma on September 26, 2012* -
## Calculus

Use Euler's method with step size 0.2 to estimate y(1.4), where y(x) is the solution of the initial-value problem below. Give your answer correct to 4 decimal places. y' = x - xy y(1) = 0 h = 0.2 Since I am at y(1) = 0 and not y(0) = 0 would I just do this

*asked by COFFEE on June 22, 2007* -
## Maths

An initial-value problem is given by the differential equation, f(x,y) = –20xy2, y(1) = 1. Use the classical fourth-order Runge-Kutta method with a step-size of h = 0.02, to obtain the approximate value of y(1.02). Give your answer to 6 decimal places.

*asked by Nancy on September 29, 2013* -
## Maath:)

If a rock is thrown upward from a height of 100 ft, with an initial velocity of 32ft/sec, solve for the time that it takes for it to hit the fround (when h=0) Round your answer to 2 decimals. Please and thankkk youuu(:

*asked by Honey on April 30, 2012* -
## Physics

A proton and an alpha particle (q = +2.00e, m = 4.00u ) are fired directly toward each other from far away, each with an initial speed of 0.247c. What is their distance of closest approach, as measured between their centers? (Hint: There are two conserved

*asked by Anonymous on January 27, 2016* -
## Calculus

Starting with an initial guess of x=2, use Newton’s method to approximate (Third root of 7). Stop the iterations when your approximations converge to four decimal places of accuracy. Compare with the approximation provided by your calculator I'm so stuck

*asked by Tia on March 13, 2016* -
## Physics

A 180 g arrow is shot straight up into the air with a speed of 17 m/s. It reaches a maximum height of 13.7449 m. Find the initial kinetic energy. The accel- eration of gravity is 9.8 m/s2 . Answer in units of J.

*asked by Anna on January 19, 2011* -
## physics

A 33300 lb (earth weight) rocket in outer space has two constant forces acting upon it, F1 = (-166i + 392j) lb and F2 = (50i + -54j) lb. Its initial velocity is (39i + 64j) ft/s. How far is it from where it started after 33 seconds?

*asked by sandhu on November 23, 2010* -
## physics

A 33300 lb (earth weight) rocket in outer space has two constant forces acting upon it, F1 = (-166i + 392j) lb and F2 = (50i + -54j) lb. Its initial velocity is (39i + 64j) ft/s. How far is it from where it started after 33 seconds?

*asked by sandhu on November 24, 2010* -
## electromagnetism

An elctron starts at the position shown in Figure with an initial speed v=5000000m/s at 45^°to the X-axis the electric field is in the positive you direction and has a magnitude of 3500N/C on which plate and at what location will the electron strike?

*asked by abdulhayi musa on March 28, 2015* -
## electromagnetism

An elctron starts at the position shown in Figure with an initial speed v=5000000m/s at 45^°to the X-axis the electric field is in the positive you direction and has a magnitude of 3500N/C on which plate and at what location will the electron strike?

*asked by abdulhayi musa on March 28, 2015* -
## math

Complete the table for a savings account in which interest is compounded continuously. initial investment = $600 annual % rate = ? time to double ? Amount after 10 years = $19,205.00 I have no idea how to solve this.

*asked by Jake on September 14, 2009* -
## Chemistry

A 25.0cm^3 aliquot of a solution containing Fe2+ ions and Fe3+ ions was acidified and titrated against KMnO4 solution. 15.0cm^3 of 0.020M KMnO4 was needed. A second 25.0cm^3 aliquot was reduced using Zn, then titrated. This time, 19.0cm^3 of the 0.020M

*asked by tam on March 10, 2011* -
## Chemistry s103 Q5

struggling to get this to come out right: Compound 1 CH2=CH-CH-OH | CH3 + Compound 2 O || CH3-CH-CH2-C | OH | | ? (i) identify any functional groups in compounds 1 & 2 by circling them and naming them clearly. (ii) complete the equation for reaction 1 by

*asked by Desmond on March 8, 2007* -
## chemistry Dr. BOB

A voltaic cell has one half-cell with a Cu bar in a 1.00 M Cu2+ salt and the other half-cell with a Cd bar in the same volume of a 1.00 M Cd2+ salt. Report your answers to the correct number of significant figures. a)Find E degree cell, delta G degree ,

*asked by Patrick on November 30, 2015*