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July 28, 2014

Search: If the KC at this temperature is 1.7x10^2, what is the equilibrium concentration of N2 ?

Number of results: 9,257

chemistry
At 25C, Kc= 3.7x10^9 for the reaction CO(g) + Cl2(g) equilibrium with COCl2(g) Calculate the Kp at this temperature.
October 9, 2007 by Wolf

chemistry
the concentration of aluminium sulfate in an aqueous solution at certain temperature is 2.7x10^-8 mol/l a) calculate Ksp for this salt at this temperature should i assume it is in a saturated solution and just use the given concentration?
April 5, 2010 by fe

mechanics of materials
The second moment of area of a hollow cylindrical beam with an inner radius of 18mm and an outer radius of 20mm is equal to A) 2.7x10-9m 4 B) 4.3x10-8 m 4 C) 7.9x10 - 13m 4 D) 2.7x10 3 m 4
January 29, 2013 by dmkp

chemistry
In the presence of a tungsten catalyst at high temperature, the decomposition of ammonia to nitrogen and hydrogen is a zero order process. If the rate constant at a particular temperature us 3.7x10^-6 mol. How long will it take for an ammonia concentration to drop from an ...
March 26, 2012 by court

physics
An 8m long copper wire with a cross-sectional area of 1.0 x 10^-4 m^2, in the sshape of square loop, is connected to a .10-V battery. If the loop is placed in a uniform magnetic field of magnitude .4T, what is the maximum torque that can act on it? The resistivity of copper is...
March 15, 2008 by Anonymous

Physics
You set out to design a car that uses the energy stored in a flywheel consisting of a uniform 103-kg cylinder of radius R that has a maximum angular speed of 450 rev/s. The flywheel must deliver an average of 1.70 MJ of energy for each kilometer of distance. Find the smallest ...
August 2, 2011 by Alex

physics
A container holds 2.2 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 7.7x10-3 kg bullet with a speed of 650 m/s. What is the Kelvin temperature of the gas?
January 28, 2013 by natasha

physics HELP!
A container holds 1.3 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 6.7x10-3 kg bullet with a speed of 830 m/s. What is the Kelvin temperature of the gas?
February 22, 2013 by Ashley

physics
A container holds 1.3 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 6.7x10-3 kg bullet with a speed of 830 m/s. What is the Kelvin temperature of the gas?
February 22, 2013 by Ashley

physics
A cylindrical brass container with a base of 80.0 cm^2 and height of 20.0 cm is filled to the brim with water when the system is at 25.0 C. How much water overflows when the temperature of the water and the container is raised to 96.1 C? (The coefficient of volume expansion ...
April 23, 2012 by Romy

AP Chemistry
Could you please check my work and let me know if my answer is correct? I don't have a solutions guide and I want to make sure I'm really comprehending the material. Calculate the # of grams of barium flouride that will dissolve in 2.50 L of pure water at 25 degrees C. Assume ...
April 8, 2008 by Sig

math
Convert: 2.7x10^-3 kg/cm^3 to kg/m^3 0.81 g/cm^3 to kg/m^3
August 26, 2008 by math

Math
(1.6x10^5)(12.7x10^4) I think it is 20.33x10^1
February 19, 2010 by pavleen

chemistry
How many moles are in 1.18g of 4.7x10^-4 M AgNO3?
October 12, 2011 by christopher

Chemistry and I think some physics
Check my answers! This site needs a preview post option! And thanks for checking! 1. Classify each of the following pure substances as an element or a compound. A) carbon B) baking soda C) nickel D) gold My answers: A) element B) compound C) element D) element 2. Perform the ...
February 1, 2007 by Libby

3 grade math
1- at 12 noon, leslie recorded the temperature as 56F. the temperature had increased by 8F from 10 A.M. the temperature at 8 A.M. was 2F warmer than it was at 10 A.M. what was the temperature at 8 A.M? MY Son write the answer is - 62F 2- the temperature at 6 P.M. was 72F. this...
February 29, 2012 by dk

algebra
put into scientific notation (3.7x10^4)(8.1x10^-7
June 14, 2010 by kam

maths
5x10^2 divide by 7x10^4 what is the answer in standard form
June 5, 2011 by hannah

chemistry
What is the original molarity of a solution of formic acid (HCOOH) whose pH is 3.74 at equilibrium? ka =1.7x10^-4
February 19, 2010 by rodrigue

chemistry
Nicotine is not only bad for you (ahem!), but it also acts as a base in aqueous solution: Kb = 7x10-7 at 298K. i) Find G per mol of nicotine acting as a base in aqueous solution at 298K. ii) Find the pH of the solution if the initial [nicotine] = 0.80 M. iii) Without ...
February 11, 2009 by Tillie

Astrophysics
Star Power and Temperature Star A and Star B Consider two stars that are the same size (they have the same diameter), but have different surface temperatures. Lets say Star As temperature is 3000 K and Star Bs temperature is 4500 K. Lets look at the ratio of Star Bs ...
October 9, 2012 by Lisa

Chemistry
The S^2- ion is a relatively strong base with an equilibrium constant of 7.7x10^-1. What is the Ka value for HS- ? I got the equation HS^- <-> H^+ + S^-2. Am I able to find [S^-2] with the Keq?
May 4, 2010 by sh

Microbiology
You have a broth that contains 2.7x10^7 cfu/ml/ How many colonies would you expect to count on a plate if you spread our: a. 1.0ml? b. 0.1ml?
February 7, 2012 by Ashley

math
(TEMPERATURE CHANGE) The rate at which the temperature of an object changes is proportional to the difference between its own temperature and the temperature of the surrounding medium. Express this rate as a function of the temperature of the object
November 12, 2011 by math

chemistry
Does one gram of 4.7x10^-4 M AgNO3 equal one cm^3 of AgN03?
October 12, 2011 by christopher

Chemistry
what is the Ka for ethylammonium cation,C2H5NH3^+, at 25 celsius?(Kb for C2H5NH2=4.7x10^-4 at 25 Celsius)
March 21, 2013 by Bb

chemistry
The mineral CaF2 has a solubility of 2.1 x 10^-4 M. What is the Ksp of CaF2? a. 1.85x10^-11 b. 9.3x10^-12 c. 3.7x10^-11 d. 8.8x10^-3
January 4, 2010 by Christina

MATH
write this in scientific notation A)(1.6x10 to the fifth power)(12.7x10 to the forth power)
February 18, 2010 by pavleen

Physics
Given that acceleration due to gravity at the surface of the earth is 9.8N/kg, estimate a value for the mass of the earth. G=6.7x10^-11
April 11, 2012 by Amponsah

algebra 1
write in scientific notation and standard form. (1.9x10 to the second power)times (4.7x10 to the 6th power) how do you do this?
March 20, 2013 by Anonymous

Biochemistry
You are studying an enzyme that has a catalytic efficiency of 7x10^7M-1s-1. Knowing that the Km=2.50M and how much enzyme did you use to obtain a maximum velocity of 2520 M/min?
August 4, 2011 by Anonymous

Chemistry
use the Hendeson-Hasselbalch equatio. To calculator the pH of a solution at is A) 0.15 M on C5H5N and 0.10M in C5H5NHCl. Kb:1.7x10^-9 B) 15.0 g of HF and 25.0g of NaFin 125 ml of a solution. Ka 3.5x10^-4
April 1, 2013 by Jill

Physics
Jenny measured the temperature of the water in a beaker, set the beaker aside, and then measured the temperature again after an hour. If the initial temperature of the water was 30C and the final temperature was 20C, which of the following could be the temperature of the ...
August 23, 2012 by Meka

Algebra 1
The temperature outside was 72 degrees at 6 am. The temperature rose 4 degrees per hour for the next 12 hours. The total temperature is a function of the number of hours the temperature rose. What was the temperature at noon? (also write an equation)
November 20, 2013 by Cristian

math Help
Solve 3.7x10^6 is this 37,000,000.
October 6, 2011 by Katie A

Temperature(Math)
At 5 o'clock in the morning, the temperature at the top of the race course was -13o. By 10:00 A.M., it was +12o. How much had the temperature risen? Answer: 25o The temperature rose from -12o to +23o by noon. How much did the temperature change? Answer: 11o In the afternoon, ...
January 26, 2012 by Andrew

Algebra (math)
The temperature outside was 72 degrees at 6 am. The temperature rose 4 degrees per hour for the next 12 hours. The total temperature is a function of the number of hours the temperature rose. What was the temperature at noon?
November 20, 2013 by Cristian

Math
on a day when the air temperature is 34 degrees celsius, a can of soft drink is taken from the fridge at a temperature of 4 degrees celsius at 2pm. Thereafter the temperature of the can satisfies the differential equation; dT/dt=0.1(34-T), where t is the number of minutes ...
May 24, 2012 by Lucy

chm
You are heating crushed ice and a small amount of water and monitoring the temperature of the icy slurry until it reaches the point were the ice is nearly melted. How does the temperature change during this process? The temperature drops as the ice absorbs the heat and ...
March 3, 2013 by jj

Chemistry
When 112 g of water at a temperature of 22.5C is mixed with 65.1 g of water at an unknown temperature, the final temperature of the resulting mixture is 46.3C. What was the initial temperature of the second sample of water?
October 8, 2010 by Noelle

Algebra NEED HELP ASAP!!!!!!
The temperature outside was 72 degrees at 6 am. The temperature rose 4 degrees per hour for the next 12 hours. The total temperature is a function of the number of hours the temperature rose. What was the temperature at noon? (write the equation as a function)
November 20, 2013 by Cristian

physics
to start a nuclear fusion reaction, two hydrogen atoms of charge 1.602x10^-19 and mass 1.67x10^-27kg must be fired at each other. If each particle has an initial velocity of 2.7x10^6m/s when released, what is their minimum seperation?
June 11, 2012 by lindsay

science
Warm-blooded animals? a) change their internal temperature to match the external temperature b) can function well in a wide range of temperatures c) have the same temperature control as plants do d) are less able to adjust to temperature changes than are cold-blooded animals e...
September 10, 2010 by pam

chem
The Ksp of PbI2 is 8.7x10^-9. Find the solubility of lead(II) iodide on mol/L. a. 1.3x10^-3 b. 9.3x10^-9 c. 6.6x10^-5 d. 1.6x10^-3
January 4, 2010 by dude

Chemistry
Calculate the mass of AgCl that will dissolve in 100ml of 2 M NH3 ksp AgCl = 1.7x10^-10 and Kf of Ag(NH3)2 = 1.6x10^7
October 25, 2013 by Michelle

Algebra 1
The temperature outside was 72 degrees at 6 am. The temperature rose 4 degrees per hour for the next 12 hours. The total temperature is a function of the number of hours the temperature rose. What was the temperature at noon? (write the equation as a function)
November 20, 2013 by Cristian

math
a weather forecaster predicts that the temperature will drop 3 degrees each hour for the next 9 hours. If the temperature is 7 degrees farenheit before the temperature starts falling, what is the temperature after the drop?
September 8, 2013 by Arlene

chemistry
The solubility product constant (Ksp) for the dissolution of PbSO4 as represented by the chemical equation is 1.7x10-8. PbSO4 (s)= Pb2+ (aq) + SO42- (aq) Calculate the mass (g) of PbSO4 that dissolves in 1100 mL of water.
May 13, 2010 by andy

Algebra
The folrmula F=9/5c+32 can be used to make temperature conversions with the Celsius ans Fahrenheit temperature scales. F-Fahrenheit temperature C=Celsius temperature Convert 100 degress Fahrenheit to the Celsius temperature scale. Book says answer is 37.78 Celsius I am not ...
February 11, 2008 by G

Math
on Monday the temperature was -2 degrees. By 4:30 Tuesday the temperature dropped by 4 degrees. By 8am Tuesday, the temperature was 1 degree. therefore find: What was the temperature at 4:30am? What the temperature change between 4:30am and 8am?
May 14, 2013 by Anonymous

chemistry
COMMON ION EFFECT 1.) What is the pH of a solution that is 0.30M in HCOOH and 0.52M in HCOOK. Ka of HCOOH=1.7x10^-4. 2.) Calculate the pH of a buffer system containing 1.0M CH3COOH and 1.0M CH3COONa. Ka of CH3COOH=1.8x10^-5.
January 20, 2011 by jaycab

Chemistry
Heat transfer from the system to the surroundings has a large effect on Ssurr ___________. a. when the temperature of the surroundings is low. b. when the temperature of the surroundings is high. c. when the temperature of the system is low. d. when the temperature of the ...
July 30, 2012 by Taylor

math
On Wednesday, the low temperature was 56derees F and the high temperature was 72.What is the difference between the two temperature?
December 4, 2012 by marthin

algebra check
at 7a.m. the temperature was -15degree F by 1 p.m the temperature had increased by 18degrees F what was the temperature at 1 pm? -15+18=3 answer:3degree F Looks good to me.
March 11, 2007 by sara

algebra 2
At 7:00 a.m. the temperature outside was F. By 11:00 a.m., the temperature had risen to F. Which equation models the temperature y at time x?
August 30, 2013 by jbass

Algebra
On a particular April day, the temperature at 8 am was 40F. By 4 pm the temperature was 64F. What was the hourly rate of temperature change?
February 11, 2014 by K-bone

Math
On average the temperature falls about 5.4 F for every 1,000ft of additional altitude. If the temperature is 42 F on the ground, estimate the temperature at 5,000 ft.
April 27, 2013 by Camille

Chemistry
The normal boiling point of a liquid is A. the temperature at which all three phases are in equilibrium. B. the only temperature at which there can be equilibrium between the liquid and gas states. C. the temperature at which the vapor pressure equals 760 mmHg. D. the ...
December 9, 2010 by Jake

math
the lowest temperature on a winter morning was -9f later that same day the temperature reached a high of 24 by how many degrees fahrenheit did the temperature increase
October 3, 2010 by kiki

math
1. Estimating the Temperature of a Yam Suppose you put a yam in a hot oven, maintained at a constant temperature of 200C. As the yam picks up heat from the oven, its temperature rises.16 (a) Draw a possible graph of the temperature T of the yam against time t (minutes) since ...
September 29, 2011 by Anonymous

Math
If the morning temperature is 24degrees and the overall temperature is 7 degrees, what is the evening temperature.
November 29, 2010 by Ev

math
write each number in scientific notation 3.68,000=6.8x10^4 4.7,000,000=7x10^6 5.30,500,000,000=3.05x10^10 6.73,280,000=7.328x10^7
September 29, 2010 by AnOnYmOuS 1

AP Chemistry
Like all equilibrium constants, Kw varies somewhat with temperature. Given that Kw is 7.5110−13 at some temperature, compute the pH of a neutral aqueous solution at that temperature.
January 24, 2014 by Gabriella

Chemistry
N2+O2 <-> 2NO Equillibrium Concentrations of the gases at 1500K are 1.7x10(-3) mol/L for o2 and 6.4x10(-3) mol/L for N2 and 1.1x10(-5)mol/L for NO. CAlculate the value of Kc at 1500K for these data? Show work please
April 27, 2011 by Jackie

Science
Please i really need help with this!!! Question: Suppose a treadmill has an average acceleration of 4.7x10^-3 m/s. a)how much does its speed change after 5min? b)if the treadmill's speed 1.7 m/s, what will its final speed be?
September 13, 2011 by Leia

calculas
Consider a cooling cup of coffee whose initial temperature is 205. The room temperature is held at 70. Suppose k = 1/16. Let y be the temperature, and y' its time derivative. ----------------------------------- I have the differential equation: y' = (-1/16)(y-70) Initial ...
March 12, 2012 by pasta!

ap chem
Like all equilibrium constants, Kw varies somewhat with temperature. Given that Kw is 5.0210−13 at some temperature, compute the pH of a neutral aqueous solution at that temperature. 006
February 14, 2011 by Anonymous

Calculus Help Please!!!
When a cold drink is taken from a refrigerator, its temperature is 5C. After 25 minutes in a 20C room its temperature has increased to 10C. (Round the answers to two decimal place.) (a) What is the temperature of the drink after 60 minutes? (b) When will its temperature be ...
April 2, 2014 by Tenshi

Math_ Intergers
On Tuesday teh temperature changes -2 degrees F perhour from noon until10:00a.m. the next morning. The temperature at noon on Tuesday is 75 degrees F. A) What is the Temperature at 4:00 p.m on Tuesday? B)What is the temperature at 9:00 a.m. on Wednesday? c)Plot the (time, ...
September 10, 2009 by DMAR

Analytical Chemistry
You prepare a solution from 10.0 mL of 0.100 M MOPS buffer (3-morpholinopropane-1-sulfonic acid) and 10.0 mL of 0.086 M NaOH. Next, you add 1.00 mL of 8.87 10-4 M lidocaine to this mixture Denoting lidocaine as L, calculate the fraction of lidocaine present in the form LH . ...
February 26, 2013 by Sam

Chemistry
Consider the two equilibria: BaF2=Ba2+ + 2F- Ksp=1.7x10^(-6) F- + H20=HF + OH- Kb=2.9x10^(-11) Determine the solubility of BaF2 at pH=5? What I'm mostly confused about is how to determine if F- is dominant or if you have to take HF into account while doing your calculations.
February 20, 2014 by Anonymous

precalculus
Outside temperature over a day can be modelled as a sinusoidal function. Suppose you know the temperature is 80 degrees at midnight and the high and low temperature during the day are 90 and 70 degrees, respectively. Assuming t is the number of hours since midnight, find an ...
March 26, 2013 by marie darling

physics
the moon has a period of 27.3 days and a mean distance of 3.90x10^8 m from the center of the earth. find the period of a satellite in orbit 6.7x10^6 m from the center of earth. thank you!
October 26, 2013 by allie

Physics
An empty elevator of mass 2.7x10^2kg is pulled upward by a cable at an acceleration of 1.2m/s. What is the tension in the cable? What would the tension be if the elevator were accelerating downward at 1.2m/s^2?
October 14, 2010 by Jill

Science
Ed wants to determine if there is a trend in air temperature changes during April. Which of the following procedures should he follow? a) Measure the temperature every hour for 1 day; b) Measure the temperature at noon every day in April; c) Measure the temperature at the same...
February 21, 2012 by Mia

algebra
Write a formula that relates temperature t in degrees Fahrenheit at altitude h (in thousands of feet) and a ground temperature of 65F. State any restrictions on h. b. Find the temperature at 11,000 ft above Earths surface.
October 16, 2012 by Hailey

Math
Problem Solving: Work Backward At 12 noon, Leslie recorded the temperature as 56 degree Fahrenheit. The temperature had increased by 8 degree Fahrenheit from 10 a.m. The temperature at 8 a.m. was 2 degree Fahrenheit warmer than it was at 10 a.m. What was the temperature at 8 a.m.
May 2, 2013 by Ann

Math word gr 8
For the month of January, the average afternoon temperature in Calgard is 1/4 the average morning temperature. The average afternoon temperature is -4 C. What is teh average morning temperature? a.) If m represents the average morning temperature, what equation models this ...
January 26, 2009 by Tyler

science
Which of these statements about saltwater is correct? Saltwater freezes at a lower temperature Saltwater freezes at a higher temperature<--- Saltwater does not freeze at any temperature. Saltwaters freezing point depends on the temperature of ocean floor
May 1, 2014 by Anonymous

Physics
Jenny measured the temperature of the water in a beaker, set the beaker aside, and then measured the temperature again after an hour. If the initial temperature of the water was 30C and the final temperature was 20C, which of the following could be the temperature of the ...
August 23, 2012 by Meka

math
The largest bubble chamber in the world is 15 ft in diameter and contains 7259 gal of liquid hydrogen at a temperature of 2247C. If the temperature is dropped by 11C per hour for 2 consecutive hours, what is the new temperature
March 16, 2010 by kirk

C#
Write a two class application that has a one-dimensional array as a data member. The array stores temperatures for any given week. Provide constructors for instantiating the class and methods to return the highest temperature, lowest temperature, average temperature, and the ...
August 12, 2013 by C#prog

programming c#
how do I Write a two class application that has a one-dimensional array as a data member. The array stores temperatures for any given week. Provide constructors for instantiating the class and methods to return the highest temperature, lowest temperature, average temperature, ...
October 2, 2013 by bo

physics
When an immersion glass thermometer is used to measure the temperature of a liquid, the temperature reading will be affected by an error due to heat transfer between the liquid and the thermometer. Suppose you want to measure the temperature of 7 mL of water in a Pyrex glass ...
December 10, 2011 by tienking

calculus
Some scientists believe that the average surface temperature of the world has been rising steadily. They have modeled the temperature by the linear function T = 0.02t + 8.75, where T is temperature in C and t represents years since 1900. (a) What do the slope and T-intercept ...
September 3, 2013 by austin

math
suppose there is a 2-degree drop in temperature for every thousand feet that an airplane climbs into the sky.If the temperature on the ground which is at sea level is 52 degres what would be the temperature when the plane reaches an altitude of 27,000 ft.
September 11, 2009 by scooby9132002

math (27)
suppose there is a 3-degree drop in temperature for every thousand feet that an airplane climbs into the sky.If the temperature on the ground which is at sea level is 63 degrees what would be the temperature when the plane reaches an altitude of 30,000 ft.
September 11, 2009 by scooby9132002

Chem
Can you please tell me if these are right? A gas has a volume of 2.8 L at a temperature of 27 degrees C. What temperature degrees C is needed to expand the volume to 15 L? (P and n are constant.) I got 1334 degress C Combined gas law problem a balloon is filled with 500.0 mL ...
November 14, 2010 by Alice

math
a cold front moves in at noon and in 5 hours, the temperature had dropped 23%. the temperature at 5:00 p.m. was 14%. let x be the temperature at noon. write an equation to find x.
November 30, 2010 by anne

physics
the temperature of a body falls from 30C to 20C in 5 minutes. The air temperature is 13C. Find the temperature after a further 5 minutes.
April 16, 2012 by frank fred

lae school
a storm front went through and the temperature dropped 10celsius in 3hr. If the temperature started at 6celsius, what was the temperature after the 3hr?
August 31, 2007 by ray

algebra
Suppose the temperature outside is dropping at a constant rate. At noon , the temperature is 70 degrees f and it drops to 58 degrees f at 5:00 P.M. How much did the temperature change each hour?
July 20, 2008 by JO

math
A cold front caused the temperature to drop to 21f. The temperature after the drop was 36f. Write and solve an equation to find the temperature before the temperature dropped. my answer is 57f. my equation is 36f=21f-f
February 4, 2013 by Americal

Physics
The wavelength of red light is about 7x10^-7m. The frequency of the red light reflected from a metal surface and the frequency of the vibrating electron that products it are the same. What is this frequency?
February 12, 2010 by sh

engineering
A thermometer is used to measure the temperature of a gas flow through a pipe. The gas temperature is read at 500C and the duct temperature is measured to be 350C. The thermometer is cylindrical with a diameter of 1 mm and an intrusion length of 1 cm. It can be assumed that ...
August 14, 2013 by jim

earth science
If the temperature at the surface is 230 C, what is the temperature at a height of 2 km under average conditions (when temperature decreses with height by 6.50 C per km)?
April 7, 2009 by sam gordi

algebra1
friday's temperature was 20 degrees warmer than monday's temperature t. write an expression for friday's temperature.... my answer is 20dregees + T is that correct?
August 26, 2010 by alanaR.

math
At 9:00 pm the outside temperature was 20 celcius, by midnight the temperature had dropped x degrees. Which of the following represents the midnight temperature? 20 + x 20-x 20 20x
October 24, 2010 by carolyn

math
One day at 3:00 a.m., the temperature was -13 degrees f in Kodiak, Alaska. At 10:00 a.m., the temperature was 22 degrees f. What was the average change in temperature per hour?
April 17, 2013 by karolina vida

Math
On average, the temperature falls about 5.4 F for every 1,000 ft of additional altitude. If the temperature is 42 F on the ground estimate the temperature at 5,000 ft
April 27, 2013 by Camille

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