Tuesday

January 24, 2017
Number of results: 75,744

**math**

At 7:00 a.m., the temperature was 8 degrees Celsius. What was the temperature at midnight if the temperature was 10 degrees lower? A.-18 degrees Celsius B.-2 degrees Celsius C.2 degrees Celsius D.18 degrees Celsius

*August 29, 2016 by pier*

**chemistry**

If a gram of water at sea level is heated from 37 degrees Celsius to 101 degrees. How much heat would be absorbed by the water?

*November 20, 2011 by john*

**chemistry**

if 180 grams of ice at -123 degrees celsius is heated to steam at 125 degrees celsius, how much energy would it take?

*April 29, 2012 by Anonymous*

**chemistry**

The density of liquid water is 0.997 g/mL at 25 degrees Celsius. a) Calculate the mass of 250.o mL (about a cupful) of water. b) How many moles of water are in 250.0 mL of water? Use the result from letter a. c) Calculate the volume that would be occupied by 2.000 mol of water...

*November 15, 2011 by khloe*

**Conceptual Physics**

Mix 50 mL of 40 degrees Celsius water with 50 mL of 30 degrees Celsius water and you will get water at...

*May 15, 2012 by Briana*

**come on dont be shy**

please heeeeeeeeeeelp i just need to know wat the abbreviation is for degrees celsius and millisecond.......HELP degrees C for Celsius. ms for millisecond. degrees C for Celsius. ms for millisecond. so is it c or dc????????????????????? C. You may write out degrees C as I did ...

*October 23, 2006 by chemiii*

**urgent**

How much heat energy is required to raise the temp of 5 kilograms of coal from 20 degrees celsius to 220 degrees celsius? A 314 J B 6,573 J C 1,314,718 J D 4,187,000 J You asked this question already. See my other posted answer.

*August 3, 2005 by alf*

**chemistry**

how much energy is released when a 5600 gram sample of water cools from 99 degress celsius to 28 degrees celcius

*May 10, 2011 by m*

**chemistry**

The specific heat of copper is .4 joules/gram degrees Celsius. How much heat is needed to change the temperature of a 30 gram sample of copper from 20 degrees to 60 degrees? I just need to know how to set up the problem and solve it.

*May 19, 2010 by Jake*

**chemistry**

Calculate the resulting pressure if 4.50 liters of nitrogen at 35 degrees Celsius and 790 torr and 3.7 liters of oxygen at 15 degrees Celsius and 750 torr are pumped into a 1.00 liters container at 25 degrees celsius. Assume ideal gas behavior.

*March 24, 2014 by carolann*

**7th Science**

the addition of 50 g of salt to a sample of pure water causes its freezing point to be reduced from 0.0 degrees Celsius to -3.15 degrees Celsius. determine how many degrees the freezing point dropped for every 10 g of salt added. Thank ya, randomchik.

*September 26, 2012 by randomchik*

**chemistry**

calculate the energy requiered to raise the temp of 1.0 mol Ag by 1.0 degrees celsius (molar heat capacity of silver) answer in j/mol(degrees celsius) what are the steps to this problem? how do I find the second temp value?

*November 6, 2007 by Avonlea*

**chemistry**

a saturated solution of barium chloride at 30 degrees Celsius contains 150 g water. how much addition barium chloride ca be dissolved by heating this solution to 60 degrees celsius? bacl2 at 30 degrees= 38.2 bacl2 at 60 degrees= 46.6

*November 27, 2012 by sam*

**Chemistry!!**

A serving of potato chips is crushed and burned in a clorimeter. the calorimeter has 2000 grams of water in it and the initail temperature is 21.0 degrees celsius. If the water's temperature increases to 29.0 degrees celsius, how many calories (kilocalories) are in the chips? ...

*May 4, 2008 by Miley*

**chemistry**

if you have 1000g of a substance at -20 degrees celsius with a specific heat of .110 c/1 degree celsius and you add 12 kilojoules to it what is the resulting temperature?

*March 8, 2011 by carla*

**eighth grade math**

at temperaturesof 100 degrees celsius or higher, water changes to steam (a gas).At temperatures of 0 degrees celsius or lower water changes to ice (a solid) . in between these extremes, water is a liquid. draw number lines showing the tempertures at which the water is: a. a ...

*March 17, 2009 by lauren<3*

**physics**

how to determine the amount of water in the container when you are given a 200g piece of aluminium at 90 degrees celcius is placed in a 100g glass container which holds an unknown amount of water at 20 degrees celcius .if the equilibrium temperature is 21.6 degrees celsius(...

*September 29, 2014 by viwe*

**Chemistry**

The solubility of CaSO4 is 0.209 g/100 mL of water at 30 degrees celsius. if 0.500 g CaSO4 is stirred overnight at 30 Degrees Celsius with 100.0 mL of water, a. How many grams of CaSO4 remain undissolved? b. Calculate the molarity of CaSO44 in solution

*October 25, 2012 by Anne*

**Science**

Why does steam at 100 degrees celsius cause a more severe burn than water at 100 degrees celsius?

*May 10, 2008 by Bob*

**Chemistry**

The molar enthalpy of combustion of demand is -6.78KJ/mol.What mass of decane would have to be burned in order to raise the temperature of 500ml of water from 20 degrees Celsius to 55 degrees celsius. I tried using ndeltaH=mcdeltat. But it didn't work. Please help

*October 17, 2016 by Kelvin*

**math**

The temperature in degrees Fahrenheit is equal to 32 more than 9/5 times the temperature in degrees Celsius. One day the high temp. was 95 degrees Fahrenheit. What was the high temp. in degrees celsius? I did 32+(9/5*35) 32+63=95 so my answer is 35 degrees celcius, Is this ...

*March 27, 2013 by B6*

**math**

As dry air moves upward it expands and in doing so cools at a rate of 1 degrees Celsius for each 100 m rise up to about 12 km If the ground temperature is 20 degrees Celsius find an expression for the temperature T as a function of the height H the answer is T=20-10h(h in ...

*October 30, 2013 by jordan*

**Math**

As dry air moves upward it expands and in doing so cools at a rate of 1 degrees Celsius for each 100 m rise up to about 12 km If the ground temperature is 20 degrees Celsius find an expression for the temperature T as a function of the height H the answer is T=20-10h(h in ...

*November 3, 2013 by Jordan*

**chemistry**

If all of the chemical potential energy stored in a 100 Calorie snack pack was converted to thermal energy and subsequently absorbed by water, what would be the final temperature of the water? Assume you have a 1.5 mole sample of water initially at 25 degrees C. The specific ...

*December 14, 2009 by Kris*

**Chemistry**

When coal is mined, it is tested for how much heat it can produce when it burns. A 1.245g sample of coal was placed into a calorimeter containing 2000.0 mLs of water at 17.5 degrees Celsius. After the coal was combusted in the calorimeter, the water's temperature was found to ...

*September 15, 2016 by A. Pool*

**chemistry**

Suppose you add a small ice cube to room temperature water in a coffee cup calorimeter. What is the final temperature when all the ice is melted? Assume that you have 200.0 mL of water at 25.0 degrees Celsius and the ice cube weighs 15.0 g and is at 0.0 degrees Celsius before ...

*October 10, 2014 by Jason*

**Chemistry**

16.3L N2 at 25 degrees Celsius and 125 kPa and 41.9L O2 at 25 degrees Celsius and 125 kPa were transferred to a tank with a volume of 5.25L. What is the total pressure at 55 degrees Celsius?

*November 14, 2013 by Matt*

**Chemistry**

out of these conditions, which would result in fastest reaction? a. 2.0M HCL, powedered CaCO3 chip, 50 degrees celsius b. 6.0M HCL, CaCO3 chip, 25 degrees celsius c. 6.0M HCL, powdered CaCO3, 50 degrees celsius. d. 2.0M HCL, CaCO3 chip, 50 degrees celsius. Im guessing C ...

*September 25, 2012 by Shreya*

**Physics**

3/2/2016 An unknown substance at a temperature of 20 degrees Celsius is warmed up to 50 degrees when water at 80 degrees is added to it. The sum of the masses of the unknown substance and water is equal to 1000grams. In another experiment, the same substance at 20 degrees is ...

*March 2, 2016 by Marilynn on behalf of Victor Hopman*

**math**

geologists estimate that earths temperature rises about 10 degrees celsius for every kilometer k below earths surface. suppose it is 50 degrees celsius on the surface of the earth. What is the formula for the temperature t in degrees celsius at a dept of k km?

*October 5, 2015 by Julia*

**Physics**

how many grams of water at 20 degrees celcius are necessary to change 800.0g of water at 90.0 degrees celsius to 50.0 degrees celcius?

*July 21, 2013 by Dale*

**Chemistry**

What is the minimum amount of ice (at 0 degress C) that must be added to 250mL of water at 23 degrees C in order to cool it to 0 degrees celsius? (Density of water= .98 g/cm^3; heat of fusion= 333J/g; heat capacity of water= 4.184J/g C; and heat capacity of ice= 1.86 J/g C)

*April 3, 2011 by Kayla*

**physics**

A 400 g marble block has a specific heat of 860 J/kg C deg. If the block is placed in 700 ml of water, the marble changes it temperature by 17 Celsius degrees. Since the specific heat of water is known to be 4186 J/kg C deg, what is the temperature change of the water. (The ...

*February 19, 2014 by Ann*

**chemistry**

the temperature of 100g of water initaially at 25 degrees celsius in a calorimeter increases to 30 degrees celsius after adding a 20g piece of hot aluminum. what was the temperature of the aluminum before adding it to water?

*September 28, 2010 by Anonymous*

**Physics**

A 0.200 kg block of ice at -15 degrees Celsius is placed into a pan on a stove, heated to a liquid, and then to vapour with a final temperature of 115 degrees Celsius. Calculate the total amount of heat required for this process.

*January 7, 2013 by Anonymous*

**Chemistry**

80.0 mL of water is initially at room temperature (22degrees C). A chilled steel rod at 2 degrees C is placed in the water. If the final temperature of the system is 21.2 degrees C, what is the mass of the steel bar? Specific heat of water = 4.18J/g(degreesC) Specific heat of ...

*October 22, 2010 by Ellen*

**physics**

you take 250.0 g of ice from the refrigerator at -8.00 degrees celsius. how much heat does it take to warm it to room temperature, 20.0 degrees celsius?

*May 13, 2012 by megan*

**science**

A certain mass of water gains 1,673 J of thermal energy when it's temperature increases by 2.0 degrees Celsius. What is the mass of the water?

*November 10, 2014 by Mary*

**Chemistry**

HELP PLEASE. I have no idea how to set this up. I tried using the q=mc(change in temp) equation but its not working out. A 59.8 g block of an unknown metal at 87.5 degrees Celsius was dropped into an insulated vesssel containing approximately 33 g of ice and 23 g of water at 0...

*September 30, 2014 by Taylor*

**Chemistry**

Octane has a vapor pressure of 40 torr at 45.1 degrees Celsius and 400 torr at 104 degrees Celsius. What is its heat of vaporization? (Given R=8.314J/mol*K) Please explain.

*December 14, 2012 by Dayton*

**6th grade**

100 milliliters of 10 degrees celsius water plus 100 milliliters of 90 degrees celsius water, what is the final temperature?

*October 26, 2010 by nataly*

**Science**

Please help!!! You mix 100 millimeters of 10 degrees Celsius water and 100 millimeters of 90 degrees Celsius water. What is the final temperature?

*September 20, 2015 by N*

**Chemistry**

When the power supplying a 30.0 gallon water heater was turned off, the temperature dropped from 75.0 degrees celsius to 22.5 degrees. How much heat was lost to the surrounding? I know I need to find the energy and or heat lost, but how will i get the mass of H2O used to ...

*April 24, 2016 by Un-Known*

**physics**

a 6 0 kg piece of aluminum at 645 degrees to celsius is combine with 1.0 kg of ice at -15 degrees Celsius in a thermally isolated calorimeter of negligible heat capacity what is the equalilbrum temperature the mixture evenually reaches?. q1+q2+q3=0 QAl = .6kg* .9kj/kg-K * 918K...

*March 9, 2015 by sharon*

**physics**

Equal 0.400-kg mass of lead and tin at 60 degrees celsius are placed in 1kg of water at 20 degrees celsius. a) what is the equilibrium temperature of the system? b)if an alloy is half lead and half tin by mass, what specific heat would you anticipate for the alloy? c) how many...

*February 17, 2013 by anonymous*

**Chemistry**

The heat of combustion of bituminous coal is 2.5 x 10^4 J/g. What quantity of coal is required to produce the energy required to convert 100. Pounds of ice at 0.0 degrees Celsius to steam at 100.0 degrees Celsius?

*January 5, 2015 by Lucy*

**Chemistry**

A gas is collected over water at 30.0 degrees celsius. It's pressure is 752.5 mm Hg. What is the pressure of the dry gas? Water vapor pressure at twenty degrees Celsius is 27.5 mm Hg.

*April 24, 2012 by Maria*

**Chemistry**

A gas is collected over water at 30.0 degrees celsius. It's pressure is 752.5 mm Hg. What is the pressure of the dry gas? Water vapor pressure at twenty degrees Celsius is 27.5 mm Hg.

*April 24, 2012 by Maria*

**chemistry**

Aluminum has a specific heat capacity of 0.903J/g degree celsius. What mass of aluminum in g would require 500j of heat to raise its temperature by 12.5 degrees celsius

*March 22, 2011 by mary*

**chemistry**

Rank the size of a change in temperature of one degree fahrenheit, one degree celsius, and one kelvin. Ok I can't seem to get this question right no matter what I do. Isn't one fahrenheit degree the largest then celsius and kelvin? There are 180 fahrenheit degrees between the ...

*August 30, 2008 by natash*

**Physics**

On the moon the surface temperature ranges from 395 K during the day to 1.02 x 102 K at night. Convert these temperatures to the Celsius and Fahrenheit scales. (a) 395 K in degrees Celsius; (b) 395 K in degrees Fahrenheit; (c) 1.02 x 102 K in degrees Celsius; (d) 1.02 x 102 K ...

*December 11, 2012 by Anonymous*

**physics**

The specific heat of pure water at 15 degrees celsius is 4184j/(kg.k). Convert this to kcal/(kg.k). pls help

*December 11, 2011 by ted*

**Chemistry**

88-L sample of dry air cools from 197 degree celsius to -48 degrees celsius while the pressure is maintained at 2.93 atm. what is the final volume?

*October 23, 2014 by Dyonna*

**chemistry**

A saturated solution of potassium chlorate is formed from 100 grams of water. if the saturated solution is cooled from 80 degrees celsius to 50 degrees celsius, how many grams of precipate are formed? Do you have a table that lists the solubility at 80 and 50 degrees C?

*January 10, 2007 by Alexus*

**Chemistry**

A solution contains 5.6g of solute in 16 cm cubed of water. When the solution is cooled, crystals begin to appear at 11 degrees celsius. What is the solubility of the solute at 11 degrees celsius?

*September 29, 2014 by Caoilfhinn*

**Chemistry**

How many grams of ice are needed to cool 250 ml of water from 75 degrees Celsius to 5 degrees Celsius? (m_ice * 6.01kJ) + (m_ice * 4.18J/g°C * (5-75°C) = -[250mL * 4.18J/g°C * (5-75°C)] ???

*September 5, 2016 by Mikey*

**Chemistry**

calculate the energy in joules lost when 70.0 grams of water cools from 86.4 celsius to 7.1 celsius

*February 26, 2013 by anon*

**Chemistry**

When 35.0 mL of 1.43 M NaOH at 22.0 degres Celsius is neutralized by 35.0 mL of HCL also at 22.0 degrees Celsius in a coffee-cup calorimeter, the temperature of the final solution rises to 31.29 degrees Celsius. Assume that the specific heat of all solutions i 4.18 J/ g* C, ...

*March 19, 2010 by Google*

**Chemistry**

If a piece of metal at -20 degrees Celsius is added to an ice and water mixutre in equilibrium at 0 degrees Celsius, which of the following statements is true??? ( Note more than one can be correct) I. the amount of ice will increase II. the amount of water will decrease III. ...

*April 22, 2007 by John*

**Chemistry**

If a piece of metal at -20 degrees Celsius is added to an ice and water mixutre in equilibrium at 0 degrees Celsius, which of the following statements is true??? ( Note more than one can be correct) I. the amount of ice will increase II. the amount of water will decrease III. ...

*April 22, 2007 by John*

**Chemistry**

The heat of combustion of bituminous coal is 2.5 x 10^4 J/g. What quantity of coal is required to produce the energy required to convert 100. Pounds of ice at 0.0 degrees Celsius to steam at 100.0 degrees Celsius? Is the answer 5.36 about right. I'm not sure if I did it correctly

*January 6, 2015 by Lucy*

**Chemistry**

A 3.23 gram sample of a sodium bicarbonate mixture was reacted with excess acid. 48.52 mL of the evolved gas was collected over water at 0.930 arm and 23.0 degrees Celsius. What is the percentage of sodium bicarbonate in the original mixture? The pressure of water at 23.0 ...

*December 11, 2010 by Tichele*

**chemistry**

A solution containing 80g of NaNO3 in 75g of H2O at 50 degrees celsius is cooled to 20 degrees celsius. A. how many grams of NaNO3 remain in solution at 20 degrees celsius? B. How many grams of solid in NaNO3 crystallized after cooling?

*November 21, 2012 by Boo Boo*

**physics**

The specific heat capacity of steel is 445 Jkg K. How much energy is required to raise the temperature of a 0.410g of kettle which contains 1.2L of water from 20 degrees Celsius to boiling point?

*July 23, 2010 by Anonymous*

**Chemistry**

A sample of cobalt, A, with a mass of 5g is initially at 25 degrees Celsius. When this sample gains 6.70J of heat, the temperature rises to 27.9 degrees Celsius. Another sample of cobalt B with a mass of 7 g is initially at 25 degrees Celsius. If sample B gains 5 J of heat, ...

*October 17, 2016 by Matthew*

**Physics - Fluids**

A cylindrical diving bell 3.0 m in diameter and 4 m tall with an open top of 25 degrees celsius, and the air temp 220 down is 5 degrees celsius. The density of seawater is 1025 kg/m^3. How high does the sea water rise in the bell when the bell is submerged?

*December 17, 2008 by Peter*

**chemistry**

If the concentration of O2 in water at 1.00 atm and 20 degrees celsius is 9.2 g/l, the concentration of O2 at 20 degrees celsius is how much in g/l?

*February 13, 2011 by Anonymous*

**Chemistry Help!!!**

1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC). 2) A sample of coal is burned in a bomb ...

*November 14, 2010 by Sarah*

**Physics**

If the specific heat of ice is 0.5 cal/g degree celsius, how much heat must be released from 5 g of water at 0 degree celsius to change it to ice at -4 degree celsius?

*November 14, 2015 by Peter*

**Chemistry 104**

A reaction rate doubles when the temperature increases from 0 degrees Celsius to 10 degrees Celsius, maintaining everything else equal. What is the activation energy for this reaction? (R = 8.314 J/mol K)

*March 8, 2013 by Walter*

**Chemistry 104**

A reaction rate doubles when the temperature increases from 0 degrees Celsius to 10 degrees Celsius, maintaining everything else equal. What is the activation energy for this reaction? (R = 8.314 J/mol K)

*March 8, 2013 by Walter*

**Physical Science**

A 144 kg park bench made of iron sits in the sun and its temperature increases from 25 degrees celsius to 35 degrees celsius. How many kilojoules of energy does the bench absorb?

*September 14, 2015 by Travis*

**AP Chemistry**

A 2.75 g sample of the hydrocarbon acetone, CH3COCH3, is burned in a bomb calorimeter with 975 mL of water, initially at 23.50 degrees celsius. The bomb is constructed of 285.0 g of nickel metal having a specific heat capacity of Cp = 0.826 J/ g degrees C. The final ...

*September 30, 2007 by Kate*

**AP CHEMISTRY**

A 2.75 g sample of the hydrocarbon acetone, CH3COCH3, is burned in a bomb calorimeter with 975 mL of water, initially at 23.50 degrees celsius. The bomb is constructed of 285.0 g of nickel metal having a specific heat capacity of Cp = 0.826 J/ g degrees C. The final ...

*September 30, 2007 by Kate*

**CHEMISTRY**

A 2.75 g sample of the hydrocarbon acetone, CH3COCH3, is burned in a bomb calorimeter with 975 mL of water, initially at 23.50 degrees celsius. The bomb is constructed of 285.0 g of nickel metal having a specific heat capacity of Cp = 0.826 J/ g degrees C. The final ...

*September 30, 2007 by Jake*

**Math**

To convert a temperature in degrees Celsius to degrees Fahrenheit multiply the Celsius temperature by 9/5 and then add 32 F Is a temperature in degrees Celsius proportional to its equivalent temperature in degrees Fahrenheit.

*October 23, 2012 by Ashely*

**Math**

To convert a temperature in degrees Celsius to degrees Fahrenheit multiply the Celsius temperature by 9/5 and then add 32 F Is a temperature in degrees Celsius proportional to its equivalent temperature in degrees Fahrenheit.

*October 23, 2012 by beth*

**Chemistry**

a 5.00 gram sample of a metal is heated to 80 degrees Celsius and is placed in a 100 gram sample of water. the temperature of the water rises from 20 Celsius to 20.3 Celsius which of these is most likely to be the metal

*April 12, 2015 by Hazard*

**English**

Posted by rfvv on Friday, September 30, 2016 at 10:08pm. ------------------------ Can we use both prepositions, on and 1. The temperature on dokdo is around 12 degrees Celsius. 2. The temperature of dokdo is around 12 degrees Celsius. of? •English - Ms. Sue, Friday, ...

*October 5, 2016 by rfvv*

**Physics -- check answers please**

1. Which of the following best shows the transfer of heat by radiation? my answer: c 2. Which of the following best shows the transfer of heat by convection? my answer: b 3. Water has specific heat of 4200 J per kilogram per degree celsius. This means that 2 kg of water will ...

*March 4, 2014 by Lisa*

**Material Science**

A polystyrene ice chest contains 3 kg of ice at 0 degrees Celsius. Triangle H for melting = 3.34 x 10 to the 5 power J/kg p = 1000 kg/m cubed, CP =4190 J/ (kg K). Heat transfer is limited by conduction (k=0.06W/m K)) from the outside wall at 30 degrees Celsius. This means that...

*August 24, 2013 by Joy*

**Chemistry**

1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC). 2) A sample of coal is burned in a bomb ...

*November 14, 2010 by Sarah*

**Chemistry**

1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC). 2) A sample of coal is burned in a bomb ...

*November 14, 2010 by Sarah*

**physics**

216J if energy is required to raise the temperature of aluminium from 15 degrees Celsius to 35 degrees Celsius. Calculate the mass of the aluminium. My work I keep getting 0.012 but it is not right I know the formula is Q= m x C x T

*November 14, 2014 by Jiskha help*

**engineering physics 2**

A 19 m long piece of wire of density 8.34 g/m3 has a diameter of 12.593 mm. The resistiv- ity of the wire is 1.7e-8(ohm)(m) at 20 degrees celsius. The temperature coefficient for the wire is 0.0038(degrees celsius)^-1. Calculate the resistance of the wire at 20degrees Celsius...

*February 28, 2008 by David*

**chemistry**

how much heat is required to completely vapporize 2.3 grams of ice starting at -50 degrees Celsius? (the specific heat of ice is 2.0 J/g.C; the specific heat of water is 4.184 J/g.C; the heat of fusion is 333 J/g; and the heat of vaporization is 22601 J/g)

*March 22, 2011 by Anonymous*

**physics**

A cup of coffee (with lid) is enclosed in an insulated cup 0.5 cm thick in the shape of a cube 9.7 cm on a side. The thermal conductivity of the cup is 0.0002 cal/s x cm x C. The temperature of the coffee is 71 degrees Celsius and the temperature of the surroundings is 25 ...

*November 20, 2010 by Isabell*

**physics**

The specific heat capacity of pure water at 15.0 degrees celsius is 4184J/(kg.k). Convert this to kcal/(kg.k). pls help

*December 11, 2011 by ted*

**yakima community college**

If a certain city had a record low for the year of -30 degrees Celsius, and a record high of 38 degrees Celsius, find the temperatures in degrees Fahrenheit.

*April 11, 2016 by Anonymous*

**chemistry**

a substance has a vapor pressure of 35.0 mmHg at 52.0 degrees Celsius and 70.0 mm Hg at 77.0 degrees Celsius. What is the heat of vaporization for this substance?

*September 30, 2012 by Bru*

**algebra 1**

The formula used to convert temperature measurements from degrees Celsius (C) to degrees Fahrenheit (F) is shown below. F = 9/5C + 32 What is the Fahrenheit equivalent of 25 degrees Celsius? Round the answer to the nearest degree.

*February 14, 2013 by Anonymous*

**homework help please! chemistry 111**

the specific heat of a certain type of metal is 0.128 J(grams per Celsius). What is the final temperature if 305J of heat is added to 74.8g of this metal initially at 20.0 degrees Celsius?

*February 26, 2012 by danielle*

**Science**

You add 7800 calories of heat to a block of ice at -40 degrees celsius. the temperature of the ice rises to 0 degrees celsius. how much ice did you heat up?

*May 13, 2008 by Bob*

**Physics**

(a) what Is the density of an object that is 14% submerged when floating in water at 0 degrees Celsius? (b) what percentage of the object will be submerged if it is placed in ethanol at 0 degrees Celsius?

*November 15, 2012 by Anonymous*

**Chemistry**

At 25 degrees celsius and 775 Torr, carbon dioxide has a solubility of 0.0347 M in water. What is the solubility at 25 degrees celsius and 1830 Torr

*February 22, 2013 by alyla*

**Chemistry**

The temperature of 100.0 mL of water was raised from 26.7 degrees C to 62.3 degrees C. How much heat in calories was added to the water? (The specific heat of water is 1.000 cal/g degrees C and the density of water at 26.7 degrees C is 0.996626 g/mL)

*April 1, 2010 by Ally*

**Chemistry**

In a mountainous location, the boiling point of pure water is found to be 95 degrees Celsius. How many grams of sodium chloride much be added to 1 kg of water to bring the boiling point back to 100 degrees Celsius? Assume that sodium chloride behaves ideally in solution.

*September 14, 2010 by Mike*

**physics**

a .300 kg piece of metal is heated to 88 degrees celsius and placed in a copper calorimeter with a mass .150 kg which contains .500kg which contains .500 L of water that are both initially at 12.6 degrees celcius. Over short period of time the mixture comes to an equilibrium ...

*April 19, 2013 by Franky*

**Math**

the current temperature is - 7 degrees Celsius. The high temperature yesterday with as many degrees above 0 degrees Celsius as the current temperature is below zero degrees Celsius. Which expression can be used to find the number of degrees between the current temperature and ...

*January 5, 2015 by hamptom*

**Physics**

A brass rod of 0.2 kg at 100degree Celsius is dropped into 0.5 kg of water at 20 degree Celsius. The final temperature of the mixture is 23 degree Celsius.calculate the specific heat capacity of brass(specific heat capacity of Water is 4200 j/kg degree c

*October 18, 2016 by Kush*