Wednesday
February 10, 2016

Search: 0.65 of argon gas is admitted to an evacuated 60 container at 60 . The gas then undergoes an isochoric heating to a temperature of 500 .

Number of results: 25,744

Chemistry
A) if you added 8g of ammonium nitrate to 25mL of room temperature water, what would be the temperature in C?
November 30, 2014 by J

Science
What is the current in the 30-ohm heating coil of a coffee maker that operates on a 120-volt circuit? Would be 120/30?
October 27, 2007 by Yumi

science
how can i describe one type of heating system, and describe how it tansfers energy to warm that air inside the rooms?
November 11, 2009 by Solano

Chemistry
1.62 g of CoCl2 x (xH20) were heated. After heating only .88g of CoCl2 remained. What was the formula of the original hydrate?
April 5, 2011 by Courtney

chemistry
if 100g of calcium carbonate on heating produces 44g of carbon dioxide,how much calcium oxide will be formed?
January 27, 2016 by suja

chem
another calorimetry experiment is performed in which a 500. gram peice of gray metal at 67 degrees celsius is added to 493 grams of water. the water's temperature, originally at 17 degrees celsius, changes to 22 degrees celsius. What is the specific heat of the gray metal? I ...
April 24, 2008 by miley

physics
A pair of fuzzy dice are hanging by a string in my car from the rear-view mirror. I hit the gas pedal, and while I accelerate the fuzzy dice no longer hang straight down, but instead make an angle θ of 15 degrees with respect to the vertical. How fast am I accelerating in...
April 29, 2013 by ianian

Physics
A pair of fuzzy dice are hanging by a string in my car from the rear-view mirror. I hit the gas pedal, and while I accelerate the fuzzy dice no longer hang straight down, but instead make an angle θ of 15 degrees with respect to the vertical. How fast am I accelerating in...
May 2, 2013 by Student Please Help....

Statistics
A Manufacturer of torque converters claim only 1% of them are defective. A. Calculate the Mean number of defective converters in a shipment of 500 converters. B. Calculate the standard deviation in the defective torque converters in a shipment of 500 converters. C. Would it be...
March 26, 2013 by Bill

Chem
Solid magnesium metal reacts with chlorine gas according to the following equation: Mg + Cl2 --> MgCl2 What mass of magnesium chloride is formed in the reaction between 7 g of Mg and 7.9 g of Cl2 use the masses to two decimal places on the chart in the front of your text ...
October 18, 2013 by Mary

Chemistry
Nitrogen can also be produced from sodium metal and potassium nitrate by the reaction: Na(s) +KNO3 (s) --> K2O(s) +Na2O(s) + N2(g) If we generate oxygen by the thermal decomposition of potassium chlorate: 2KClO3(s) --> 2KCl(s) +3O2(g) How many grams of potassium nitrate ...
November 8, 2015 by Ka_Chin

Science
Why is passive soalr heating referred to as passive?
December 6, 2007 by Robin

chem 203
Br2=2Br When 1.05 mol of br2 is placed in a .950L flask, 1.20% of Br2 undergoes dissociation. Calculate the equilibrium constant Kc, for this reaction. Use ICE table.
April 13, 2008 by ron

math
Ez stop fast gas sold 10957 worth of gasoline yesterday. Redular grade sold for 2.30 a gallon and premium grade sold for 2.55 a gallon. If the station sold 420 more regular than premium, how many gallons of regular were sold
August 12, 2013 by Anonymous

chem
(CH3)N2H2(l) + 2N204(g) = 3N2(g) + 4H2O(l) + 2CO2(g). consider the reaction b2n 150g of liquid (CH3)N2H2 & 80L of N2O4 at 27 degree celcius & a pressure of 2 atm. The gases produced are collected at 27 degree celsius in an evacuated 250L. Calculate: a) Partial pressure of ...
September 8, 2011 by alia

Math
The following data represents the high-temperature distribution for a summer month in a city for some of the last 130 years. Treat the data as a population. Temperature Days 50-59 4 60-69 309 70-79 1428 80-89 1485 90-99 393 100-109 8 According to the empirical rule, 95% of ...
January 27, 2013 by Kristina

math
the temperature at 12 noon was 10 degree Celsius above 0.decrease at the rate of 2 degree Celsius per hour until midnight at what time would temperature be 8 degree Celsius below zero? what would be temperature at mid-night?
July 2, 2013 by dev

Finance
A firm has forecasted sales of $3,000 in April, $4,500 in May and $6,500 in June. All sales are on credit. 30% is collected the month of sale and the remainder the following month. What will be the balance in accounts receivable at the beginning of July
March 21, 2011 by Adam

psychology
Hello, I have to do a method section for a paper and need to know what I would put down for measurement and procedure section. like an example its on 500 college women and 500 college men participating in a study. thanks
June 28, 2012 by darien

Economics
Consider the simple economy of Behr, whose government does not tax its citizens. The consumption function of Behr is given by: C=500+.8Y, where Y is income. the autonomous consumer spending in this economy is: A. $1000 B. $800 C. $500 D. $.80 E. $1800
November 9, 2012 by Mary

chemistry
Baking soda is sodium bicarbonate, NaHCO3, and vinegar is primarily acetic acid, HC2H3O2. When baking soda is added to vinegar, the resulting reaction produces a tremendous amount of gas, as shown in this video. Complete this equation for the reaction of NaHCO3(s) with HC2H3O2...
April 19, 2013 by lee

Chemistry
There are two flask, one filled with a)ice bath, and b)boiling water. Ice bath: 1.00 L O^2(g) at STP Boiling water: 1.00 O^2(g) If we want the pressure to remain at 1.00bar when the O^2(g) is heated to 373K, what mass of O^2 must we release from the flask? I know that I should...
September 24, 2013 by Mae

Math
This expression 1.8C + 32, show how to convert from degrees Celcius to degrees Fahrenheit, where C represents the temperature in degrees Celcius. What is the temperature in degrees Farrenheit when the temperature is 25 degrees Celsius?
December 10, 2014 by Amy

Math
Temperature readings on the Fahrenheit and Celsius scales are related by the formula 𝐶 = 5 9 (𝐹 − 32). Determine when the temperature reading on the Celsius scale is twice the temperature reading on the Fahrenheit scale.
December 10, 2015 by Help Please!

chemistry!
how do we find the grams ppt of the following: 0.500 M CaCl2= 10 mL 0.500 M Na2CO3= 20 mL Ca:CO3= 1:2 grams ppt= ?
October 14, 2010 by Anonymous

chem
How do you prepare a solution of 12 M HCl and want to prepare 500 mL of a 0.4 M solution. Assume you have a 500-mL volumetric flask
October 16, 2012 by maggie

Thermodynamics
A closed cycle gas turbine unit operating with max. And min. Temp. Of 760 and 20 Celsius deg has a pressure ratio of 7/1. Calculate the thermal efficiency and work ratio? Ans = 42.7 % , 0.505 My answers are : Efficiency 42.7 % which is correct.. but work ratio = 1.977. T1 and ...
November 26, 2015 by Akki

Math>> Help!!
You complain that the hot tub our hotel suite is not enough. The hotel tells you that they will increase the temperature by 10% each hour. If the current temperature of the hot tub is 75 Fereneit Degrees, what will be the temperature of the hot tub after 3 hours, to the ...
April 16, 2013 by Jnr John

math
Starting from today, every month you save $500 into a bank account with earns interest at an annual rate of 4%. How much money do you have in the account at the end of 4 years? My working is F=R(((1+i)^n)-1)-i where R=500, i=1/300 and n=48. Ans=$25,979.80 Am I solving it ...
August 19, 2014 by Anonymous

question
A temperature of 41 degrees F is equivalent to 278.2 degrees K, while a temperature of 86 degrees F is equivalent to 303.2 degrees K. Find the equation converting Kelvin temperature to Fahrenheit. What is the Fahrenheit temperature when it is 180 degrees K? on converting ...
March 1, 2011 by bianca

Chemistry-DrBob222
A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0 grams of water the resulting solution freezes at 2...
January 17, 2011 by Patrick

math/chem
I need to find the mass of butane gas and I only know the following things (you cannot use the molar mass of butane): volume = 80 mL pressure = 98.23 KPa temp.= 298K So I found the number of mols and I got 0.003171814 mols. of butane. But I don't know what to do after this ...
December 12, 2008 by Lena

life science
At high altitude the atmospheric pressure is lower and the air is less dense than at low altitude.this means that at high altitude there is less oxygen available for gaseous exchange thus gas exchange becomes less efficient. what conclusion can be made?what will happen to the ...
August 3, 2015 by merissa

Physics
A Geiger counter measures redioactive decay by registering the electrical pulsed produced in a gas tube when high-energy particles pass through it. The particles emanate from a redioactive source-say, radium. In accord with Heisengerg's Uncertainty Principle, does the act of ...
March 31, 2008 by TJ

Science
1. Which of the following is the most effective way to preserve biodiversity? A. Captive breeding B. Habitat destruction C. Habitat preservation *** D. Habitat fragmentation 2. Which of the following describes the use of a renewable form of energy? A. using natural gas to heat...
January 20, 2016 by Cait

Health/Law
Which one is True Please check my answer thanks :) In jury trials ..... 1. The judge has no role. 2. Parties may request a trial jury for any type of case. 3. The judge and jury both have a role 4. The jury decides whether edvidence should be admitted I picked #3
November 14, 2007 by Anonymous

Math Help please
You complain that the hot tub in your hotel suite is not enough. The hotel tells they will increase the temperature by 10% each hour. If the current temperature of the hot tub is 75 degrees Fahrenheit, what will be the temperature of the hot tub after three hours to the ...
April 17, 2013 by Seth

Chemistry
You take 326 g of a solid (melting point = 57.6oC, enthalpy of fusion = 346 J/g) and let it melt in 757 g of water, and the water temperature decreases from its initial temperature to 57.6oC. Calculate the initial temperature of the water. (Note that the specific heat ...
May 6, 2012 by Jake

HELP
A brass rod with a length of 10.0 cm is placed end to end with an aluminum rod with a length of 30.0 cm and this system is placed between a hot temperature of 100C and a cold temperature of 10.0C. The coefficient of thermal conductivities of the brass and the aluminum are ...
March 20, 2013 by amy

chemistry 1
When butane undergoes complete combustion , the products are CO2 and H2O C4H10(g) + O2(g)-> CO2(g) + H2O(g) What is the value of the coefficient for oxygen when this equation is balanced
March 7, 2010 by jeanette

physics
The student undergoes a second displacement of 5.0 meters at an angle of 45 degrees SOUTH of EAST. The x component, (EAST WEST) of the total displacement is_
December 16, 2010 by Anonymous

physics
The student undergoes a second displacement of 5.0 meters at an angle of 45 degrees SOUTH of EAST. The x component, (EAST WEST) of the total displacement is_
December 16, 2010 by mohamed mokhbat

Calculus
Newton's Law of Cooling states that the rate at which an object cools is proportional to the difference in temperature between the object and the surrounding medium. Thus, if an object is taken from an oven at 303 F and left to cool in a room at 74 F, it's temperature T after ...
October 13, 2009 by Z32

Physical Chemistry
A total charge of 97.4 kC passes through an electrolytic cell. Determine the quantity of substance produced in each of the following cases. (a) the mass (in grams) of silver metal from a silver nitrate solution ?g (b) the volume (in liters at 273 K and 1.00 atm) of chlorine ...
March 29, 2010 by Mark

chemistry
Find the a)partial pressure of ethylene oxide and b)the total gas pressure, after 30 hours in a reaction vessel at 415C if the initial pressure of ethylene oxide is 782mmHg. k= 2.05x 10^-4 t(1/2)=56.3 Part A) I converted hours to seconds, and used the formula ln(Pa)t = 108000s...
April 17, 2014 by mae

Science
Predict what would happen to a reptile body temperature if the outdoor temperature increases by 10c.
March 16, 2009 by Zach

Chemistry
A l.00L flask contains 4.40mol of HI at a certain temperature. The Keq at this temperature is 5.0 * 10^-4. What are the concentrations of H2 and I2 at equilibrium?
December 28, 2009 by Shawn

chemistry
A 4.30 g nugget of pure gold absorbed 293 J of heat. The initial temperature was 23.0C. What was the final temperature?
May 10, 2010 by brett

science
How much heat in kcal must be added to 0.32 kg of water at room temperature (20C) to raise its temperature to 36C?
October 26, 2010 by Anonymous

math
from 1am to 5am the temperature dropped 16 degrees what was the average change in temperature per hour
September 15, 2012 by tiffany

Intro Chem
A block of aluminum with a volume of absorbs 67.4 J of heat. If its initial temperature was 32.5 C, what is its final temperature?
March 2, 2013 by Amee

chemistry
18.5g Al is submerged in 20.2g of water with a total temperature of 27C. How much energy in joules is absorbed by the Al if the temperature changes to 32C ?
May 28, 2013 by Ana

Math
The temperature of an object in a experiment is T(t) = 60(1/3)^t + 10, where T is the temperature in degrees C and t is time in seconds. What is the domain and range of this situation?
May 4, 2014 by Tom

Science 207
3. How would the weather be affected if the water was at a decreased temperature? What about at an increased temperature?
May 26, 2014 by Anonymous

SCI 207
3. How would the weather be affected if the water was at a decreased temperature? What about at an increased temperature?
June 1, 2014 by Linda

science
How much heat in kcal must be added to 0.77 kg of water at room temperature (20C) to raise its temperature to 50C?
December 26, 2014 by jenny

math
The temperature drops 5F each hour for 4 hours. Use en integer to express the total drop in temperature.
January 12, 2015 by tanishia

algebra
The temperature at 5pm is 20F. The temperature at 10pm is -5F. How many degrees did it fall?please show work
January 12, 2016 by aggs

ap biology
* how do (1) temperature and (2) pH affect the activity of this enzyme? include a discussion of the relationship between the structure and the fuction of this enzyme as well as a discussion of how structure and fucntion of an enzyme are affected by temperature and pH. * ...
November 4, 2008 by carol

Chemistry
At a certain temperature, the pH of a neutral solution is 7.77. What is the value of Kw at that temperature?
November 22, 2010 by Pete

Chemistry
A temperature of 316 degrees on Kelvin is = to what temperature in Celsius?
August 30, 2011 by Lelsey

math
The temperature x in f is related to the temperature in c by the relation c(x) = 5/9 (x-32).What is the slope of graph in (b)?
November 6, 2014 by leo

chemistry
Hi Please ... is the absolute temperature equal temperature in kelvin? Thanks for you
February 28, 2015 by doa'a

Science
What's the difference between ambient temperature and body temperature?
December 16, 2015 by Mel

Math
If the temperature was -10F and dropped by 16F what would the temperature be?
December 16, 2015 by Joseph

physics
In the operating Room, anesthesiologists use mass spectrometers to monitor the respiratory gases of patients undergoing surgery. One gas that is often monitored is the anesthetic isoflourane (molecular mass = 3.06 10−25 kg). In a spectrometer, a singly ionized molecule...
March 4, 2010 by joshua

Chemistry
1.What is the molar heat of vaporization of water, given the following thermochemical equations? H2 + 1/2 O2 --> H2O + 241.8 kJ H2 + 1/2 O2 --> H2O + 285.5 kJ a) 44.0 kJ/mol b)-44.0 kJ/mol c)241.8 kJ/mol 2. Which substance has a standard enthalpy of formation delta Hf, ...
July 21, 2010 by John

chemistry 11
a chamber contains 5.5 grams of hydrogen gas another chamber contains chlorine when the valve is opened the react to form hydrogen chloride with a mass 1995.5 grams. What is the mass of chlorine?
November 6, 2011 by lola

chemistry
in the reaction of magnesium metal with hydrochloric acid to produce magnesium chloride and hydrogen gas. If 4.59 mol of magnesium and 4.59 mol of hydrochloric acid are reacted, how many moles of magnesium chloride are produced ?
August 26, 2013 by tyler

chemistry 116
The thermite reaction demonstrated in class requires high temperatures to start the reaction. A simple open flame is not enough to start the reaction. Once the reaction is going, then it generates enough heat to keep the reaction going. According to the literature on thermite...
January 28, 2015 by danny

math
you complain that the hot tub in your hotel suite is not enough. the hotel tells you that they will increase the temperature by 10% each hour. If the temperature of the hot tub is 75%F, what will be the temperature of the hot tub after 3 hours, to the nearest tenth of a degree?
April 27, 2013 by Jeconiah. please a needy help!!!

physics
a 2.00kg copper plate with an initial temperature of 20.0 degrees Celsius slides with a constant velocity down a 150m long surface that is inclined at 30 degrees angle to the horizontal. If the mechanical energy lost by the system due to friction is absorbed by the copper to ...
November 25, 2012 by HELPME!♥

(12)Chemistry - Science (Dr. Bob222)
Calculate delta E for a process in which 88.0 g of nitrous oxide gas (N2O) is cooled from 165 ˚C to 65 ˚C at a constant pressure of 5.00 atm. The molecular weight of nitrous oxide is 44.02 g/mol, and its heat capacity at constant pressure, Cp, is 38.70 J/molK. A) - ...
May 8, 2014 by Ana

Math
The question is: The freezing point of helium is -272 degrees celsius. The original temperature of a sample of helium is 3 degrees celsius. a.How much must the temperature change to ensure that helium freezes? -AND- b.Assume the temperature changed at a stedy rate for 25 ...
September 22, 2008 by Ali

chemistry
I have to prepare a 0.2% water solution of n-propanol and a water solution of methanol and isopropanol at 0.2% that can be in the same container. It didn't specify but I'm pretty sure the solutions are v/v%. For the n-propanol a 0.2% solution should just be 2mg/mL of solution ...
February 2, 2014 by making solutions

history
please check my answer Describe the major territorial advances made by the United States in teh 19th Century Ohio had been admitted by 1803 as a new state. Thomas Jefferson purchased the Louisiana territory from France in 1803, this was the Louisiana Purchase. This addition ...
April 20, 2009 by history

Chemistry II
The total volume of hydrogen gas needed to fill the Hidenbrug was 2.0e8 L at 1.0 atm and 25 degrees Celsius. How much heat was evolved when the Hidenburg exploded, assuming all the hydrogen reacted? 2.0e8 L H2/22.4 L H2 = 8.9e6 mol H2 For every 2 mol H2 used -572 kJ of energy ...
May 20, 2007 by Jayd

chemistry
Gaseous hydrazine reacts with a gas X to form the gases nitrogen and HX by way of the following reaction: NH (g)+2X (g)=N (g)+4HX(g) The enthalpy change for Reaction 1 is −1180 kJ mol−1. Sketch or try and layout a fully labelled diagram showing how the internal ...
January 25, 2011 by James Holland

Science: Space
I'm having trouble finding the answers to these fill-in-the-blank questions: Our understanding of the solar system has changed from an Earth-centered model of ____ and ____ to the sun centered model of _____ and _____. I was thinking for the first 2 blanks: rocks; oxygen and ...
May 13, 2015 by Anonymous

Physics 11
SPH3U1 Two blocks of mass 500.0 g and 200.0 g are suspended vertically as shown in the diagram. The top string is lifted vertically upwards with a force of 8.48N on the 500.0 g Block (sorry no diagram) Thank you very much for your help
October 15, 2009 by Andy

chemestry
A student weighs out a 14.0 g sample of Fe(NO3)2, transfers it to a 500 mL volumetric flask, adds enough water to dissolve it and then adds water to the 500 mL tic mark. What is the molarity of iron(II) nitrate in the resulting solution?
November 17, 2010 by cristy

Physics II
The heating element of an electric oven is designed to produce 3.3 kW of heat when connected to a 240-V source. What must be resistance of the element?
February 8, 2008 by Jenny

Chemistry
One more question: Which of the following effectively increases the reactant concentration? Is it: heating the reactant mixture or increasing pressure Thanks!
April 16, 2012 by Lucy

SCIENCE
which process does not produce a physical change of state? A) MELTING ICE B) HEATING WATER VAPOUR C) FREEZING WATER D) MY GUESS IS
December 13, 2012 by Taillen

science
2.750 g of copper(II) oxide, CuO2, was reduced by heating at high pressure with excess hydrogen to yield 2.196 g of copper Cu.
September 15, 2014 by anthony young

science
On heating 10grams copper sulphate crystals (CuSO4.5H2O),6.4 grams anhydrous sulphate was left .Find the value of X .
January 15, 2016 by Kishan singh

Function
Fahrenheit and Celsius are two measures of temperature. The temperature in degrees Celsius is equal to five ninths of 32 less than the temperature in degrees Fahrenheit. What is a function rule that represents this situation?
May 6, 2013 by Anon

science
Please help this is worth a big grade and is due tomorrow stoichiometry calculation- Na weighs .53g water is 91.92 ml Patm= 30.03 in Hg Gas Law Calculation same info as above Balanced Chem. equation same info as above Unit conversion setup and calculation same info as above
May 30, 2007 by matt

Delft Solar Cell
Consider a crystalline PV module with the following output parameters mentioned at STC (Standard Testing Condition) conditions by the manufacturer. Pmax = 250W Voc = 50V Isc = 6A NOCT = 40C Temperature coefficient of power = -1W/C a) If the ambient temperature falls to 0C ...
November 25, 2013 by Deepak

calculus
The Snowtree cricket behaves in a rather interesting way: The rate at which it chirps depends linearly on the temperature. One summer evening you hear a cricket chirping at a rate of 160 chirps/minute, and you notice that the temperature is 80F. Later in the evening, the ...
January 19, 2015 by Kita

math (need help badly)
the vertices of triangle DEF are D(5,12)and E(2,7) and F(8,4) Triangle DEF undergoes an enlargement with the centre ,O, and scale factors k.Its image is D`E`F` where D(5,12)arrow D`(7.5,18) a)How do i detremine the value of k
May 23, 2008 by rita

A.P. Chemistry
Thorium-232 undergoes alpha decay and has a half-life of 1.4 * 10^10 years. How long will it take for a 1.00mg sample of thorium-232 to be reduced to 0.5mg?
April 25, 2013 by John

AP Chemistry
33.0 L of methane (CH4) undergoes complete combustion at 0.961 atm and 20◦C. How much CO2 is formed? Answer in units of L How much H2O is formed?
October 13, 2013 by Anonymous

physics
An object undergoes simple harminic motion of amplitude A. Through what total distance does the object move during one complete cycle of its motion?
August 7, 2015 by Godwin

chemistry lab
please help its due at 5 When 0.671 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 109C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to ...
February 23, 2009 by tweety

chem
A student carried out a simple distillastion on a compound known to boil at 124 C and reported an observed boiling point of 116-117 C. Gas chromatographic analysis of the product showed that the compound was pure, and a calibration of the thermometer indicated that it was ...
November 3, 2008 by Jason

algebra
Marlene drive 540 miles to visit friend. drive for 3 hours then stopped for gas, then drive 4 more hours stopped for lunch. how many more hours do I drive if my average speed for trip is 60 miles per hour ? How would I write an equation?
December 8, 2011 by Todd

Chemistry
For the following reaction, 5.20 grams of propane (C3H8) are allowed to react with with 23.1 grams of oxygen gas. propane (C3H8) (g) + oxygen (g) carbon dioxide (g) + water (g) What is the maximum amount of carbon dioxide that can be formed? grams What is the FORMULA for the ...
December 4, 2010 by Austin Jekins

chemistry
A 1.00-L sample of dry air at 25 C contains 0.0319 mol N2, 0.00856 mol O2, ... The main components of dry air, by volume, are N2, 78.08%; O2, 20.95%; Ar, ... by volume, of the following main gaseous components: N2, 74.1%; O2, ... What is the partial pressure of each gas in ...
April 19, 2011 by Kate

Math - Linear Equations
A car gets 21 mi/gal in city driving and 28 mi/gal highway driving. If 18 gal of gas are used in traveling 448 mi, how many miles were driven in the city, how many driven on the highway (assuming that only the given rates of usage were actually used)?
November 19, 2007 by Chuck

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