Thursday

April 24, 2014

April 24, 2014

Number of results: 44,279

**chemistry please help **

The FM band of radio waves are measured in megahertz (MHz), which are the numbers you see on the radio dial. Therefore, a radio station at 102.5 on the FM dial has a frequency of 102.5 MHz or 102,500,000 Hz. What is the wavelength of the radio station that has a frequency of ...
*Sunday, October 31, 2010 at 9:58pm by Tamina*

**algebra**

102 litre+0.01 m^3=? 102 liters is 102 * 10^-6 m^3 still confused x2+10=
*Saturday, February 3, 2007 at 7:08pm by Marcela*

**statistics**

It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of the mean for this group is ___________ and the...
*Monday, April 14, 2014 at 11:18pm by Sally*

**statistics**

It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of the mean for this group is ___________ and the...
*Tuesday, April 15, 2014 at 12:59pm by Katie*

**statistics**

It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of the mean for this group is ___________ and the...
*Wednesday, April 16, 2014 at 11:04am by Stacey*

**Chemistry**

If a system has 2.50 × 102 kcal of work done to it, and releases 5.00 × 102 kJ of heat into its surroundings, what is the change in internal energy of the system?
*Friday, November 11, 2011 at 2:33pm by Harley*

**Math**

For the following data... 1. Provide evidence as to whether this data set if Gaussian or non Gaussian. 2. Determine the normal reference range. 3. Define a cut-off. Describe how a ROC curve can be used to determine such. 95 95 81 95 98 79 88 98 84 79 98 84 81 96 102 86 90 101 ...
*Thursday, April 12, 2012 at 5:32pm by Joe*

**Chemistry**

You have 4.271 x 102 mL of oxygen gas (O2) at 7.656 x 102 mm of Hg and 78 oC. What is the mass of the sample in milligrams? When alcohol evaporates according to the equationC2H5OH(l) --> C2H5OH(g), how many liters of gaseous alcohol, measured at STP, are created by the ...
*Wednesday, April 17, 2013 at 12:55pm by Tif*

**Chemistry **

You have 4.271 x 102 mL of oxygen gas (O2) at 7.656 x 102 mm of Hg and 78 oC. What is the mass of the sample in milligrams? What is the ratio of effusion rates for a light gas, such as HF, to a heavy gas, such as UF4?
*Tuesday, April 16, 2013 at 9:49pm by Tif*

**Physics**

A 1.0 102 g piece of copper at a temperature of 460 K and a 2.0 102 g piece of aluminum at a temperature of 2.2 102 K are dropped into an insulated bucket containing 5.0 102 g of water at 280 K. What is the equilibrium temperature of the mixture? (Use the specific heats found ...
*Monday, November 26, 2012 at 1:03pm by Ray*

**chemistry**

A balloon is filled to a volume of 5.0 102 mL at a temperature of 28.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 102 K. What is the final volume of the balloon? the answer i got is v=166.66666667 My question is what is the correct sig. figures...
*Thursday, April 29, 2010 at 8:50pm by chase*

**Math**

What is the common difference of the following arithmetic sequence? 102, 100, 98, 96... 2 -2 -1 102 Is it -2?
*Tuesday, November 12, 2013 at 11:47am by Anonymous*

**Statistics**

98,99,99,103,101,102,104,89,87,90,90 Within how many standard deviations of the mean is the value 102?
*Tuesday, June 5, 2012 at 3:30pm by Anonymous*

**Statistics**

87,89,90,90,98,99,99,101,102,103,104 Within how many standard deviations of the mean is the value 102?
*Tuesday, June 5, 2012 at 4:06pm by Anonymous*

**Chemistry**

A balloon is filled to a volume of 1.0 102 mL at a temperature of 38.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 multiplied by 102 K. What is the final volume of the balloon?
*Friday, June 11, 2010 at 1:43pm by Brittney*

**chemistry**

A fuel mixture used in the early days of rocketry is composed of two liquids, hydrazine (N2H4) and dinitrogen tetraoxide (N2O4), which ignite on contact to form nitrogen gas and water vapor. 2 N2H4 + N2O4 --> 3 N2 + 6 H2O If 1.50 x 102 g of N2H4 and 2.00 x 102 g of N2O4 are...
*Sunday, November 4, 2012 at 7:38pm by Sheree'*

**AP Chemistry**

A balloon is filled to a volume of 2.0 102 mL at a temperature of 33.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 102 K. What is the final volume of the balloon?
*Monday, October 15, 2012 at 3:49pm by Ashley*

**Math (check my work please?)**

A baseball player has 34 hits in 102 times at bat. Another baseball player has 24 hits in 96 times at bat. Write each player's batting average. Here's what I did: 34/102 = BP #1 24/96 = BP #2 34/102 = 1/3 24/96 = 1/4 1/3 --> 4/12 1/4 --> 3/12 4/12 + 3/12 = 7/12 7/12 ...
*Wednesday, October 16, 2013 at 11:38pm by Teresa Perri*

**Math**

What is the cardinal number for the following sets? A) 101,102,103,104,.......121 B) (1,2), (101,102), (0,105)
*Thursday, December 11, 2008 at 4:50pm by Bria*

**Math**

What is the cardinal number for the follwing sets? 1). 101,102,103,104,....121 2). (1,2) (101,102) (0,105)
*Thursday, December 11, 2008 at 6:59pm by Bria*

**Chemistry**

Question: A sample of Freon-12 (CF2Cl2) occupies 2.261 x 101 L at 337 K and 2.917 x 102 kPa. Find its volume (in L) at standard temperature and pressure (STP). Equation: p1v1/t1=p2v2/t2 My Work: (2.917 x 102 kPa)(2.261x101 L)/337K = (101.3 kpa)( x )/273 k My Answer: 543.4 L Is...
*Wednesday, July 13, 2011 at 12:06am by Bradley*

**statistics**

98,99,99,103,101,102,104,89,87,90,90 Find the 25th and 75th percentiles. Within how many standard deviations of the mean is the value 102. Find the interquartile range.
*Monday, June 4, 2012 at 8:09pm by Anonymous*

**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 ...
*Tuesday, December 11, 2012 at 10:55am by Anonymous*

**chem**

C2H4Br2 + 3 I- -> C2H4 + 2Br- + I3- [C2H4Br2]M [I1]M Initial Rate (M/s) 1 0.127 0.102 6.45 x 10-5 2 0.343 0.102 1.74 x 10-4 3 0.203 0.125 1.26 x 10-4 Determine the order of the reaction in C2H4Br2:
*Sunday, February 4, 2007 at 5:24pm by kim*

**chemistry**

At what temperature (in ) does acetone have = 102
*Wednesday, January 20, 2010 at 7:09pm by aamani*

**Please help with steps: Geometry**

Two mountain bikers have been separated and are hoping to find each other. One biker reads on her GPS that she is located at 102.9 degrees west and 44.1 degrees north. She decides to ride towards the mountain peak, which on the map has the coordinates 102.5 degrees west and 44...
*Wednesday, November 2, 2011 at 8:23pm by Erika*

**Chemistry**

What is the molarity of a 5.00 x 102 ml solution containing 2490 g of KI?
*Sunday, August 18, 2013 at 7:59pm by Victoria*

**Chemistry**

A sample of nitrogen gas is confined in a 8.494 L container at 2.643 x 102 torr and 50 oC. How many moles of gas are present in the sample? So I thought I set this problem up right and when I type the answer into CALM my answer is incorrect. This is what I did: PV=nRT (2.643 x...
*Monday, January 20, 2014 at 4:50pm by Cassie*

**Chemistry**

What is the freezing point of an aqueous solution that boils at 102.1 C?
*Monday, April 26, 2010 at 5:26pm by Justin*

**chemistry**

Determine the energy of a photon with a wavelength of 6.74 ✕ 102 nm.
*Saturday, November 9, 2013 at 8:53pm by aaliyah*

**CHEMISTRY**

I used 10mL of unknown NaCl-NaBr mixture titrate with 0.10M silver nitrate solution. 10.15mL of silver nitrate solution is used. the conc. of NaCl-NaBr mixture is 8g/dm3 I need to calculate the % composition of the NaCl-NaBr mixture. I used the following calculation steps but ...
*Thursday, April 29, 2010 at 1:34pm by albee*

**college chemistry**

.361 g of a non-volatile solute is dissolved in 160.0 g of water. The solute does not react with water nor dissociate in solution. Assume that the resulting solution displays ideal Raoult's law behaviour. At 90 oC the vapour pressure of the solution is 5.1701×102 torr. (The ...
*Friday, February 18, 2011 at 7:50pm by silver*

**chemistry**

At what temperature (in degrees C) does acetone have Pvap= 102 mmHg?
*Monday, January 25, 2010 at 9:00pm by Lauren*

**Chemistry**

Calculate the velocities of electrons with de Broglie wavelengths of 1.7 102 nm and 5.0 nm, respectively.
*Saturday, November 13, 2010 at 1:24am by Anna*

**Chemistry**

How many grams of lithium nitrate, LiNO3, are required to prepare 3.00 × 102 mL of 2.00 × 10–1 M solution?
*Wednesday, May 12, 2010 at 9:43am by Chris*

**chemistry**

Calculate the mass of KI in grams required to prepare 7.00 multiplied by 102 mL of a 2.60 M solution
*Tuesday, October 12, 2010 at 8:51pm by Anonymous*

**Chemistry**

A brownie contains 1.30 ×102 mg of sodium. What is this mass equivalent to it in units of grams?
*Sunday, February 20, 2011 at 11:17pm by Des*

**Chemistry**

Calculate the number of moles in these quantities. 1. 25.0 g KNO3 2. 5.4 x 102 g (NH4)2C2O4
*Sunday, March 20, 2011 at 12:23am by Netta*

**Physics**

A 3.60 102-kg piano is being lifted at a steady speed from ground level straight up to an apartment 18.0 m above the ground. The crane that is doing the lifting produces a steady power of 4.00 102 W. How much time does it take to lift the piano?
*Monday, February 25, 2008 at 3:48pm by Peter*

**college: physics**

A 4.00 102-kg piano is being lifted at a steady speed from ground level straight up to an apartment 16.0 m above the ground. The crane that is doing the lifting produces a steady power of 4.00 102 W. How much time does it take to lift the piano?
*Monday, October 12, 2009 at 7:53pm by Anonymous*

**Chemistry-102**

what is the ph solution obtained by mixing 25.00 ml of 0.250 ml HCl and 25.00ml of 0.125M NaOH
*Wednesday, March 23, 2011 at 10:58pm by Christian*

**Chemistry**

A 1-ounce serving of Cheetos has 2.90 ×102 mg of sodium. What is this mass equivalent to in units of grams?
*Tuesday, September 6, 2011 at 8:21am by Shelley*

**chemistry**

How many grams of lithium nitrate, LiNO3, are required to prepare 3.00 × 102 mL of 2.00 × 10−1 M solution?
*Tuesday, December 6, 2011 at 2:21pm by kathy*

**chemistry**

For each of the following explain how you would prepare 1.0 L of a solution that is 0.10 M in K+. Repeat for concentrations of 1.0 × 102 ppm K+ and 1.0% w/v K+.
*Wednesday, September 12, 2012 at 12:44pm by Anonymous*

**Geometry**

The following scores on the midterm exam in Chemistry 102 were recorded: 93 81 59 69 82 73 61 77 95 84 88 71 86 97 63 72 89 80 60 98 91 62 78 83 76 81 94 66 83 96 Find the interquartile range (IQR).
*Sunday, November 22, 2009 at 11:23pm by aleah*

**chemistry**

102.0 (typical frequency for FM radio broadcasting) Express your answer using four significant figures.
*Thursday, December 8, 2011 at 11:54am by Anonymous*

**physics**

10. The following three point charges are placed on the x axis: +5.0 mC at x=0; +4.0 mC at x= -40 cm; and +6.0 mC at x= +80 cm. Find (a) the electric field magnitude and direction and (b) the electric potential at x= +10 cm. a) E = k(5E-6)/.102 +k(4E-6)/.502 - k(6E-6)/.702 = +...
*Monday, January 11, 2010 at 2:55am by tv*

**math**

A chemist has 30%, 40 % and 80 % acid solutions. All three were to be mixed to make 4.00 x 102 L of 38% acid solution but a mistake was made and the amounts of 30% and 80 % were reversed. The result was 4.00 X 102 L of 65 % acid solution. What were the amounts of each solution...
*Saturday, November 17, 2012 at 3:05am by David*

**Math(Can someone please answer!!)**

ln [2.30E-2] = ln(0.102) - (k s-1)(2360 s) k = 6.31E-4 s -1 I did 2360k = 1n(0.102 * 0.023) 2360k = -6.055 then I divided 2360 by -6.055 but I didnt get 6.31e-4. Where did I mess up???
*Sunday, March 11, 2012 at 5:45pm by Hannah*

**chem**

The molarity and the molality of a solution prepared by dissolving 2.00 g of ethanol C2H5OH with 100.0 g of water to give a final volume 102 mL are would i just add both the grams and divide by 102 for molarity? and molalty i would just add the mass?
*Friday, August 8, 2008 at 6:49pm by so*

**MATH**

The following scores on the midterm exam in Chemistry 102 were recorded: 93 81 59 69 82 73 61 77 95 84 88 71 86 97 63 72 89 80 60 98 91 62 78 83 76 81 94 66 83 96 Find the interquartile range (IQR). I FORGET HOW TO DO THIS
*Wednesday, November 18, 2009 at 4:39pm by JEN*

**math**

The following scores on the midterm exam in Chemistry 102 were recorded, 93 81 59 69 82 73 61 77 95 84 88 71 86 97 63 72 89 80 60 98 91 62 78 83 76 81 94 66 83 96 find the interquartile range. I do not understand this question.
*Sunday, January 17, 2010 at 8:07pm by Christy*

**chemistry**

What is the energy of a photon with a wavelength of 8.45 102 nm? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 J · s.)
*Thursday, October 21, 2010 at 12:57pm by mary*

**Physics**

A certain CD has a playing time of 76 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 102 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.1 102 rpm. Find the magnitude of the average angular acceleration of the CD. ...
*Monday, March 24, 2008 at 1:50pm by John*

**physivs**

A certain CD has a playing time of 68 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 102 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.1 102 rpm. Find the magnitude of the average angular acceleration of the CD. ...
*Saturday, December 4, 2010 at 5:45pm by Anonymous*

**chemistry**

i need to know if I am in the right tract please let me know...I am calulating the molality of the following exercise so I could be able to apply the formula T=Kf * molality calculate the freezing point of a solution containin 12.2 grams of benzoic acid, dissolved in 250 grams...
*Monday, October 27, 2008 at 4:20pm by Joshua*

**chemistry**

I need to determine how many grams of Cesium Iodide following solutes would be needed to make 5.00 102 mL of a 0.300 M solution.
*Monday, October 1, 2012 at 12:46pm by Shawn*

**physics**

A motorcycle (mass of cycle plus rider = 3.0 102 kg) is traveling at a steady speed of 20 m/s. The force of air resistance acting on the cycle and rider is 1.8 102 N. Find the power necessary to sustain this speed under the following conditions. (a) the road is level (b) the ...
*Tuesday, October 26, 2010 at 4:42pm by joshua*

**college chem**

The cation M2+ reacts with NH3 to form a series of complex ions as follows: M2+ + NH3 M(NH3)2+ K1 = 102 M(NH3)2+ + NH3 M(NH3)2 2+ K2 = 103 M(NH3)2 2+ + NH3 M(NH3)3 2+ K3 = 102 A 1.0 × 10–3 mol sample of M(NO3)2 is added to 1.0 L of 15.0 M NH3 (Kb = 1.8 × 10–5). What is the ...
*Sunday, April 24, 2011 at 7:19pm by richard *

**physics**

A cheetah runs a distance of 102 m at a speed of 27 m/s and then runs another 102 m in the same direction at a speed of 34 m/s. What is the cheetah's average speed?
*Saturday, September 18, 2010 at 2:18pm by john*

**chemistry**

A kitten's normal body temperature is 102ºF. Express this temperature in ºC.
*Tuesday, January 31, 2012 at 7:04pm by kr*

**Chemistry**

The boiling point of an aqueous solution is 102.35 °C. What is the freezing point? Constants can be found here.
*Tuesday, February 21, 2012 at 1:59am by Heather*

**Chemistry**

The boiling point of an aq solution 102.11 C. What is the freezing point?
*Tuesday, July 12, 2011 at 5:38pm by Josh *

**chemistry**

Potassium perchlorate has a lattice energy of -599 kj/mol and a heat of hydration of -548 kj/mol. Find the heat of solution for potassium perchlorate when 10.6 g of potassium perchlorate is dissolved with enough water to make 102.7 ml of solution. (J-absorbed) find the ...
*Friday, September 18, 2009 at 5:32pm by ella *

**Chemistry-102**

What is the pH obtained by mixing 50.00mL of 0.100N HOAc (acetic acid) and 25.00mL of 0.200N NaOH?
*Sunday, March 27, 2011 at 5:52pm by Christian*

**Chemistry**

The pressure of a 27o mL sample of gas is 102 kPa. What would be the pressure if the volume were increased to 378 mL?
*Tuesday, December 11, 2012 at 5:28pm by Annaisabel*

**chemistry**

A sample of an ideal gas has a volume of 2.29 L at 2.90 × 102 K and 1.08 atm. Calculate the pressure when the volume is 1.57 L and the temperature is 302 K.
*Tuesday, May 7, 2013 at 10:43pm by Alexis*

**Chemistry!**

a)consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP? b) What is the freezing point of an aqueous solution that boils at 102.1 C?
*Monday, April 26, 2010 at 5:51pm by Justin*

**algebra am i right**

Find the volume of a right circular cylinder whose base has an area of 6 cm^2 and whose height is 17 cm. [A] 153ð cm^3 [B] 612ð cm^3 [C] 102 cm^3 [D] 153ð cm^2 [E] None of these i think its C Please show your work. That's the right answer, but we'd like to know why too. um i ...
*Wednesday, September 27, 2006 at 12:06pm by cassii*

**chemistry**

a liquid has an enthalpy of vaporization of 30.8 kg.mol. at 273 K it has a vapor pressure of 102 mmHg. What is the normal boiling point of this liquid
*Thursday, February 17, 2011 at 6:49pm by ella*

**chemistry**

a liquid has an enthalpy of vaporization of 30.8 kg.mol. at 273 K it has a vapor pressure of 102 mmHg. What is the normal boiling point of this liquid
*Thursday, February 17, 2011 at 7:10pm by ella*

**chemistry 1046**

Calculate the solubility (in grams per 1.00 102 mL of solution) of magnesium hydroxide in a solution buffered at pH = 9 the ksp of Mg(oh)2 = 2.06e-13
*Tuesday, July 3, 2012 at 8:23am by Anonymous*

**Chemistry**

A sample of carbon dioxide has a volume of 22.0 L at 5.80 x 102 mm Hg. What pressure, in torr, would be needed to increase the volume to 48.6 L at constant temperature?
*Wednesday, November 6, 2013 at 12:19am by Anonymous*

**chemistry**

A sample of carbon dioxide has a volume of 22.0 L at 5.80 x 102 mm Hg. What pressure, in torr, would be needed to increase the volume to 48.6 L at constant temperature?
*Wednesday, November 6, 2013 at 10:53pm by Anonymous*

**Physics**

A baseball with a mass of 0.15 kilograms collides with a bat at a speed of 40 meters/second. The duration of the collision is 8.0 × 10-3 seconds. The ball moves off with a speed of 50 meters/second in the opposite direction. What is the value of the force? A. 1.8 × 102 newtons...
*Friday, March 15, 2013 at 10:44am by fredrick*

**Math for Educators**

Use Gauss's approach to find the following sums (do not use formulas). a. 1 + 2 + 3 + 4 +...+ 102 b. 1 + 3 + 5 + 7 +...+1001 a. The sum of the sequence is ? My answer 102-51(103)= 5,253 b. The sum of the sequence is? My answer 500.3(1,002)=501,300.6 Are my answers correct? If ...
*Tuesday, June 4, 2013 at 12:24pm by Carol*

**Math**

Annie's math test scores are 68 82 82 88 92 98 Her median test score is.. A.30 B.82 C.85 D.88 C? The high temperature for the last 5 days were 28,28,32,55,77 What is the range? A.28 B.32 C.44 D.49 D? The high temperature for six days in August were 93,98,100,102,102,105 What ...
*Thursday, March 21, 2013 at 10:53pm by Jerald*

**Alpha decay**

Hi I am working on a question which discusses ununhexium atomic number 116 atom weight 292. This isotope undergoes 7 alpha decay reactions. I have calculated that after seven reactions the product would be 102 nobelium. I cannot understand how the atomic weight can be right...
*Wednesday, January 17, 2007 at 2:58pm by Atom ant*

**chemistry**

a sample of water under study was found to boil at 102 degree celiceus at normal temperature and pressure . is the water pure
*Thursday, June 23, 2011 at 10:39am by sanjeed*

**Chemistry**

At what temperature (oC) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1oC? I did (v1/t1)=(v2)/(t2) v1=17.8 v2=6.1 t1=27.1 C = 300.25 K the answer i got for t2= 102.894 K which would be -170.106 C This doesnt seem right is it?
*Monday, October 18, 2010 at 10:40am by kellie*

**chemistry quick homework help**

A sample of Freon-12 (CF2Cl2) occupies 2.507 x 101 L at 291 K and 2.518 x 102 kPa. Find its volume (in L) at standard temperature and pressure (STP).
*Monday, April 15, 2013 at 12:21pm by will.i.am*

**Chemistry**

(a) A 102-g sample of water is placed in an insulated container and allowed to come to room temperature at 21°C. To heat the water sample to 41°C, how much heat must you add to it? kJ (b) Consider the hypothetical reaction, being run in an insulated container that contains 102...
*Tuesday, June 7, 2011 at 8:25am by Lance*

**physics**

A missile of mass 1.10 102 kg is fired from a plane of mass 5.50 103 kg initially moving at a speed of 3.15 102 m/s. If the speed of the missile relative to the plane is 1.06 103 m/s, what is the final velocity of the plane?
*Thursday, November 29, 2012 at 7:10pm by Anthony*

**physics**

A missile of mass 1.20 102 kg is fired from a plane of mass 5.50 103 kg initially moving at a speed of 3.05 102 m/s. If the speed of the missile relative to the plane is 1.21 103 m/s, what is the final velocity of the plane?
*Friday, March 14, 2014 at 9:45pm by Anonymous*

**Rate of change problem**

In 1993, 90 houses were built. in 1997, 102 more houses were built. find the average rate of change in the number of new homes built. express the result in terms of new houses built per year. a. 1/3 b. 102/90 c. 3/1 d. 5/2 could you explain it too? i dont really get how to set...
*Sunday, December 30, 2012 at 11:31pm by kathy m.*

**Chemistry **

Determine the molarity (in mol/L) of NO2− ions in solution when 9.77×101 g of sodium nitrite is added to enough water to prepare 3.94×102 mL of the solution.
*Wednesday, March 2, 2011 at 3:39pm by Colin*

**chemistry **

a sample of 15.00 g of an unkown metal chloride, MCl2 is dissolved in 75.0 mL water. the boiling point of the resulting solution is measured at 102.37 degrees C. what is the identity of the metal M.
*Monday, May 13, 2013 at 11:53am by alice *

**chemistry **

a sample of 15.00 g of an unkown metal chloride, MCl2 is dissolved in 75.0 mL water. the boiling point of the resulting solution is measured at 102.37 degrees C. what is the identity of the metal M.
*Monday, May 13, 2013 at 1:28pm by lucy*

**Chemistry;HELP**

How did he get 15 moles? What is the molarity of a 5.00 x 102 ml solution containing 2490 g of KI? 5.00*10^2ml = 500ml = .5L KI has molar mass 166, so you have 15 moles of KI 15moles/.5L = 30moles/L = 30M
*Tuesday, August 20, 2013 at 12:27pm by Unknown*

**CHEMISTRY**

1. If 29.0 L of methane, CH4, undergoes complete combustion at 0.961 atm and 140°C, how many liters of each product would be present at the same temperature and pressure? 2 If air is 20.9% oxygen by volume, a. how many liters of air are needed for complete combustion of 25.0 L...
*Thursday, October 10, 2013 at 7:06pm by Anonymous*

**economics**

year nominal GDP GDP deflator (billions) (based year 1992) 1993 725 101.2 1994 762 102.4 Are these answeres correct???? 4.a) The growth rate of nominal income between 1993 and 1994 is 5.10% (725-762)/725*100=5.10% b) The growth rate of the GDP deflator between 1993 and 1994 is...
*Tuesday, September 26, 2006 at 9:12am by shelby*

**chemistry - enthalpy change and finiding volume of**

29. Consider the following chemical equations and their enthalpy changes. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) ΔH = −8.0 × 102 kJ CaO(s) + H2O(_) → Ca(OH)2(aq) ΔH = −65 kJ What volume of methane, at 20°C and 100 kPa, would have to be combusted ...
*Wednesday, June 8, 2011 at 2:36pm by Farah *

**Chemistry**

Calculate the mass in g of aniline (C6H5NH2, Kb = 4.3 x 10-10) that must be added to 1.4 x 102 mL of 0.24 M (C6H5NH3)Cl solution in order to generate a buffer solution of pH 5.56. Give your answer to 2 significant figures. Noclue...
*Saturday, November 24, 2007 at 10:25am by Andrew*

**chemistry**

mass= 3.8721g temperature= 102 degrees Celsius volume= 156ml atmospheric pressure= 755.0 mm Hg calculate the molar mass using the ideal gas law
*Tuesday, November 23, 2010 at 9:38pm by VICKY*

**Chemistry**

Please help and explain each problem. PLEASE!!!! 1. If 29.0 L of methane, CH4, undergoes complete combustion at 0.961 atm and 140°C, how many liters of each product would be present at the same temperature and pressure? 2 If air is 20.9% oxygen by volume, a. how many liters of...
*Thursday, October 10, 2013 at 8:41pm by Anonymous*

**Chem**

Consider this reaction: CO (g) + H2O (g0 <---> CO2(g)+H2(g) kc=102 at 500 K A reaction mixture initially contains 0.145 M of CO and 0.145 M of H20. What would be the equilibrium concentration of [CO]? I so far have kc= [H2][CO2]/[CO][H2O]= 102 I know i have to set up an ...
*Sunday, March 21, 2010 at 8:00pm by Katie*

**CHEMISTRY........**

i TRIED TO DO IT, BUT MY ANSWERES ARE WRONG. Please show work and explain. 1. If 29.0 L of methane, CH4, undergoes complete combustion at 0.961 atm and 140°C, how many liters of each product would be present at the same temperature and pressure? 2 If air is 20.9% oxygen by ...
*Thursday, October 10, 2013 at 1:03am by Anonymous*

**chemistry**

A 0.6996 g sample of a compound containing C, H, and F was burned to produce 0.6039 g CO2 and 0.1235 g H2O. If the molar mass of the compound was determined to be approximately 102.0 g/mol, what is its molecular formula?
*Friday, January 20, 2012 at 4:19am by kenny*

**Chemistry **

What mass of sucrose (C12H22O11) would you combine with 5.28 102 g of water to make a solution with an osmotic pressure of 9.14 atm at 298 K? (Assume a density of 1.0 g/mL for the solution.) I came up with 67.5 but no luck...help please!!
*Tuesday, July 3, 2012 at 8:15am by Anonymous*

**Chemistry**

Nitroglycerin, an explosive compound, decomposes according to the equation below. 4 C3H5(NO3)3(s) 12 CO2(g) + 10 H2O(g) + 6 N2(g) + O2(g) Calculate the total volume of gases when collected at 1.2 atm and 25°C from 1.3 102 g of nitroglycerin.
*Sunday, December 2, 2012 at 4:36pm by Shawn*

Pages: **1** | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>