Tuesday

October 21, 2014

October 21, 2014

Number of results: 28,338

**physics**

4.80-kg watermelon is dropped (zero initial speed) from the roof of a 25.0-m-tall building. a) Calculate the work done by gravity on the watermelon during its displacement from the roof to the ground. b) What is the kinetic energy of the watermelon just before it strikes the ...
*February 21, 2010 by anton*

**physics**

a golf ball with an initial angle of 38 degrees lands exactly 240 m down the range on a level course. neglecting air friction, what initial speed would achieve this result? using that initial speed, what is the maximum height reached by the ball?
*November 17, 2010 by Anonymous*

**physics**

a ball mass 800g is dropped from height of 5m and rebounds to a hight of 3.8m the air resistance is negligible. calculate a. the kinetic energy of the ball just before impact b. the initial rebound speed of the ball c. the energy transferred to the ground during impact
*December 13, 2010 by lewis*

**Physics**

A seed shoots out from the pod with the speed of 2.4 m/s but with a direction of motion 30 below the horizontal. The seed pod is initially 1.2 m above the ground. (a) How long does it take for the seed to land? (Neglect air resistance.) (b) What horizontal distance does it ...
*October 14, 2011 by Kaylah*

**Calculus**

A pomegranate is thrown from ground level straight up into the air at time t=0 with velocity 128 feet per second. Its height in feet at t seconds is f(t)=16t^2+128t. Find the time its hits the ground and the time it reaches its highest point.
*January 30, 2012 by Anonymous*

**Physics **

Isaac pushes rock, of a mass of 20kg, if from a cliff and it falls into the lake below. The cliff was 3m above the water. (Assume no air resistance) a. How much time did it take the rock to hit the water? b. What was its velocity when it was half of the distance to the water?
*February 20, 2012 by Hayli*

**physics please help!**

A bat moving at 6.5 m/s is chasing a ﬂying insect. The bat emits a 37 kHz chirp and receives back an echo at 37.65 kHz. At what speed is the bat gaining on its prey? Take the speed of sound in air to be 336 m/s. Answer in units of m/s
*December 8, 2012 by maura *

**Physics**

A ball of mass 0.3 kg, initially at rest, is projected from ground level toward a wall that is 27.0 m away. The ball's velocity the moment it is projected is 75.0 m/s at 60 relative to the horizontal, and the wall is 11.0 m high. During its flight, the ball impacts nothing ...
*March 7, 2013 by Jalen*

*****CHEM QUESTIONS*****

1. will molten sodium chloride (NaCl) cunduct electric current? Why? 2. Why does adding detergent to water make it spread out into thin sheets. (Use a name and explanation) 3. Define capillary action 4. Which has a greater vapor pressure: CCl4 (carbon tetrachloride)or CH30H (...
*March 8, 2009 by BRITTANY!*

**Chemistry**

In the reaction: P4 (S) +Cl2 (g)PCl5(s), 1. If you have 10.00 grams of Phosphorus to react with 220 grams of Chlorine gas, what would be the theoretical yield of PCl5(s), in grams? 2. Why was there condensation of the beaker of cold water when a blue flame was passes ...
*December 4, 2010 by Jerome*

**Technology**

ok..so i have these labs in technology. and i'm on the first one. here's how it goes: ACTIVITY 1A-DESIGN PROBLEM Background: Technology is the application of knowledge to create machines, materials, or systems to help us make work esasiers, to make life more comfortable, or to...
*October 28, 2009 by y912f*

**Computers**

Create a class named Checkup with fields that hold a patient number, two blood pressure figures (systolic and diastolic), and two cholesterol figures (LDL and HDL). Include methods to get and set each of the fields. Include a method named computeRatio() that divides LD ...
*April 18, 2007 by Andreah*

**Health**

This can be C. OR D. couldn't it be? A second hand statement? Dang! or even B. Keep running this through my head Which one of the following statements is an example of hearsay? A. I saw the doctor administer the injection. B. I checked the patients blood pressure three times...
*July 6, 2010 by Jessica*

**Psychology**

"I just can't make myself study ahead for a test. I work better under pressure. Perhaps it is the fear associated with waiting until the last minute that gets me going." This approach to motivation is best explained by: (Points: 5) incentive approaches. drive-reduction ...
*February 22, 2011 by Lisa*

**Chemistry **

1.00 g of sodium is added to a large excess of water under conditions of constant pressure (1.00 atm) and constant temperature (25 C ). The following reaction occurs: 2Na (s) +2H2O (l)------> 2NaOH (aq) +H2(g) Delta Hrxn =-369 kJ/mol Calculate the heat released after 1.00...
*March 18, 2012 by Riley*

**Chemistry**

Snow forms in the upper atmosphere in a cold aid mass that is supersatuated with water vapor. When the snow later falls through a lower, warm air mass, rain forms. When atomic weight is 63.5 amu. Calculate the edge length of the unit cell.
*February 3, 2008 by Lauren*

**Chemistry**

Snow forms in the upper atmosphere in a cold aid mass that is supersatuated with water vapor. When the snow later falls through a lower, warm air mass, rain forms. When atomic weight is 63.5 amu. Calculate the edge length of the unit cell.
*February 4, 2008 by Lauren*

**eng physics**

in a downhill race a skier slides down a 40 degree slope. starting from rest how far must he slide down the slope to reach a speed of 130 km/hr. ignore air friction and assume the co effiecnt of kinetic friction between skies and snow is .1
*October 30, 2010 by anthony*

**chemistry**

1. In standard column chromatography, it is better to change from a nonpolar solvent to more polar solvent. What are some disadvantages if the reverse is done? 2. what would happen if air bubbles were trapped in the adsorbent in column chromatography? is it loss in resolution...
*November 8, 2010 by Anonymous*

**Physics**

A bat emits a chirping sound of frequency 67.0 Hz while moth hunting. The chirp lasts for 1.0 ms and then is silent. The beginning of the echo returns just after the outgoing chirp is finished - how close to the moth is the bat? Assume a cool night with air temperature of 10 ...
*November 30, 2010 by Dee *

**physics**

For specific heat and measuring 5 mL of air within a syringe and comparing while submerging in boiling water and ice water and extrapolating back, is your measurement of absolute zero close to the actual value (-273 C)? How might you change the experiment to get closer to the...
*June 26, 2011 by Anonymous*

**physics**

An airplane is flying with a velocity of 86.0 m/s at an angle of 20.0^\circ above the horizontal. When the plane is a distance 119 m directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.How far from the dog will the suitcase ...
*September 12, 2011 by Anonymous*

**Physics**

A 7 kilogram bowling ball is dropped from a fourth story window. If each story is 3 meters high, use energy conservation (not the equations of motion) to find the ball's velocity when it strikes the ground. Ignore air resistance. 1/2 m v^2= mgh v= sqrt (2g*(3+.5)) V=sqrt(2)(9....
*February 26, 2012 by TRACY*

**physics**

A 7 kilogram bowling ball is dropped from a fourth story window. If each story is 3 meters high, use energy conservation (not the equations of motion) to find the ball's velocity when it strikes the ground. Ignore air resistance. 1/2 m v^2= mgh v= sqrt (2g*(3+.5)) V=sqrt(2)(9....
*February 27, 2012 by TRACY*

**PHYSICS**

A 7 kilogram bowling ball is dropped from a fourth story window. If each story is 3 meters high, use energy conservation (not the equations of motion) to find the ball's velocity when it strikes the ground. Ignore air resistance. 1/2 m v^2= mgh v= sqrt (2g*(3+.5)) V=sqrt(2)(9....
*February 28, 2012 by TRACY*

**Math**

The amount of nitrogen dioxide A in parts per million (ppm) that was present in the air in the city of Homer on a certain day in June is modeled by the function A(t) = -2t^2 + 32t + 12, where t is the number of hours after 6:00 A.M. Use this function to find the time at which ...
*June 14, 2012 by Bryce*

**Physics**

What are the first, second, and third frequencies audible from a 20 cm long organ pipe when (A) only one end is open and when (B) both ends are open. The speed of sound through the air inside the organ pipe is 343m/s. (Hint: if a harmonic does not exist, it would not be heard.)
*July 10, 2012 by Kelsey*

**physics**

What are the first, second, and third frequencies audible from a 20 cm long organ pipe when (A) only one end is open and when (B) both ends are open. The speed of sound through the air inside the organ pipe is 343m/s. (Hint: if a harmonic does not exist, it would not be heard.)
*March 28, 2013 by Help*

**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**

The specific gravity of a sample of concentrated nitric acid is 1.42. What is the volume in liters at 20oC occupied by 145.3 g of this concentrate nitric acid?
*May 11, 2008 by Esmeralda*

**Calculus**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=x^2, x=y^2 about the axis x=1
*October 30, 2008 by Sam*

**Calculus**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=x^2 x=y^2 about the axis x=5
*April 29, 2009 by Anonymous*

**algebra**

Solve the indicated variable: 1. Volume of a cone: solve for h: V=ir^2h/3 2. Temperature formula: solve for C: F=9/5C+32 pleaseeeee help me solve these! plzzz! i have nooo idea how to do these. THANKS! =)))
*September 20, 2009 by kitty kat*

**science**

An unknown metal has a volume of 20cm^3 and a mass of 54g. What is the likely identity of the unknown metal? could i please have some help with this? ur help is appreciated. :D
*September 29, 2009 by becca*

**Chemistry**

A sample of H2 gas (12.28 g) occupies 100.0 L at 400.0 K and 2.00 atm. How much volume will a 9.49 g sample of H2 occupy at 353 K and 2.00 atm? a. 68.2 L b. 54.7 L c. 147 L d. 109 L e.77.3 L Is it a. 68.2 L?
*January 3, 2010 by Anonymous*

**chemistry**

If 100 mL of a 3 M solution of sodium hydroxide is diluted to a total volume of 600 mL with distilled water, what will the final concentration of sodium hydroxide be?
*February 17, 2010 by Brittany*

**7th grade**

VOLUME OF A TRIANGULAR PRISM WITH A BASE OF 4FT HEIGHT OF 18FT AND THE HEIGHT OF A PRISM IS 22 FT . THEN CHANGE YOUR ANSWER IN YARDS ! HELLPPP!
*April 12, 2010 by hillary*

**SCIENCE/CHEM**

the volume of a sample of gas is 650.ml at STP. what volumes will the sample occupy at 0.0degrees celsius and 950.torr??? is it 650.ml?
*May 12, 2010 by Andy*

**Chemistry**

Listerine mouthwash has 21.6% ethyl alcohol by volume. What mass of ethanol is contained in 20.0 mL of mouthwash ?! ( the density of ethanol is 0.789 g/mL.) how would yu do this problem ?!?!
*July 24, 2010 by Nicole*

**Calculus**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=0, y=x(3-x) about the axis x = 0
*August 2, 2010 by Grant*

**Chemistry**

The solute molecules mixed with the solvent molecules in a solution cause the freezing point of a solution to be ______ than it is for an equal volume of pure _________.
*August 21, 2010 by Cecilia *

**Chemistry**

A water solution containing 25.0% sucrose by mass, has a density of 1.25g/mL. What volume of this solution in liters, must be in an application requiring 2.50 KG of sucrose?
*September 27, 2010 by Kate*

**calculus**

An ice cube is melting so that its edge length x is decreasing at the rate of 0.1 meters per second. How fast is the volume decreasing when x = 2 meters?
*October 5, 2010 by nesri*

**calculus**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=4 x^2, x = 1, y = 0, about the x-axis
*December 9, 2010 by john*

**Calculus**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. x=4y^2, y=1, x=0 about the y-axis
*January 23, 2011 by anonymous*

**math**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. x=2y^2 , y=1 ,x=0 about the y-axis
*January 29, 2011 by yoo*

**chemistry**

what volume of a 2.5m stock soltio of acetic acid (HC2H3O2) is required to prepare 100.0 mililiters of a 0.50m acetic acid solution?
*January 23, 2013 by Anonymous*

**Calculus**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. x=2y^2 y=1 x=0 about the y-axis
*April 22, 2011 by Loree*

**Chem3**

A solution is prepared by dissolving 22.8 mL of methanol (d = 0.782 g/mL) in 100 mL of water (d = 1.00 g/mL) so that the final volume of solution is 118 mL. What is the percent methanol by mass?
*May 2, 2011 by Ryan*

**CALCULUS:)**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. x=3y^2, y=1, x=0 about the y-axis.
*August 16, 2011 by Brit*

**CALCULUS:)**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=x^2, x=y^2 about the axis x=3
*August 16, 2011 by Brit*

**chemistry**

How many grams of NH4Cl must be added to 0.490 L of 1.70 M NH3 solution to yield a buffer solution with a pH of 9.40? Assume no volume change. Kb for NH3 = 1.8 10-5.
*October 26, 2011 by kelly*

**calculus**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=x^2, y = 0, x = 0, x = 3, about the y-axis
*December 7, 2011 by Matthew barlow*

**Calculus**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=x^2, y = 0, x = 0, x = 3, about the y-axis
*December 7, 2011 by Matthew barlow*

**Chemistry**

78 mL of a 1.60M solution is diluted to a volume of a 238mL. A 119-mL portion of that solution is diluted using 133 mL of water. What is the final concentration
*April 13, 2012 by Sam *

**Math**

A circle is measured by a straight line across its widest part. This line is the __________ of the circle. A. area B. radius C. volume D. diameter
*July 14, 2012 by Mary*

**Physics**

An ice cube of volume 17.7 cm3 is initially at a temperature of -19.3C. How much heat is required to convert this ice cube into steam?
*July 31, 2012 by Sierra*

**math concepts and applications**

What is the volume of a triangular prism that has a base area of 30 mm2 and height of 18 mm? (v=bh) A.48 mm3 B.96 mm3 C.270 mm3 D.540 mm3 A?
*August 15, 2012 by melissa*

**Calculus**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=x^2,x=y^2 about the axis x=7
*October 26, 2012 by Cindy*

**maths**

The perimeter of the base of a cylinder is as same as the perimeter of a square whose one side is 11 cm. If the volume is 98π cm3, the height of the cylinder will be :
*November 30, 2012 by maihul*

**Chemistry**

Determine the volume of H2S (at 375 K and 1.20 atm) needed to produce 55.0 g of S. Assume that there is excess SO2 present. 2 H2S(g) + SO2(g) 3 S(s) + 2 H2O(g)
*December 6, 2012 by Emma*

**Chemistry**

54.0 mL of a 1.50 M solution is diluted to a total volume of 258 mL. A 129-mL portion of that solution is diluted by adding 165 mL of water. What is the final concentration?
*February 2, 2013 by Sara*

**community umuokpu**

if 50cm3 of co2 were put in 40cm3 of Oz. Determine the gas that would be in excess and calculate the volume of the gas that would be used
*February 9, 2013 by Tessy*

**Chemistry**

An experiment requires 0.7 M NH3(aq). The stockroom manager estimates that 15 L of the base is needed. What volume of 15 M NH3(aq) will be used to prepare this amount of 0.7 M base?
*March 8, 2013 by Matthew*

**chemistry**

What is the percent by volume (% v/v) of a solution made by mixing 12 ml of ethanol (C2H5OH) with 48 ml of water? b) Assuming the density of ethanol is 0.789g/ml, what is the molarity of this solution?
*March 19, 2013 by ben*

**Calculus-Differentials-Check please?**

if the sides of a cube are measured with an error of 2% use differentials to estimate the relative error in the volume df= 3x^2 * dx df= 3x^2 * 1/50 df= 3/50*x^2 is this right?
*April 23, 2013 by Liliana*

**Units of Volume and Capacity**

Greater than, less than, equal to: 30 mL ___ 30cm cubed 100cm cubed ___ 1 gallon Please explain.
*May 7, 2013 by Celest*

**Calculus**

Let V be the volume of the three-dimensional structure bounded by the region 0≤z≤1−x^2−y^2. If V=a/bπ, where a and b are positive coprime integers, what is a+b?
*July 7, 2013 by Mark*

**calculus**

Let V be the volume of the three-dimensional structure bounded by the region 0≤z≤1−x^2−y^2. If V=a/bπ, where a and b are positive coprime integers, what is a+b?
*July 18, 2013 by andy*

**math**

if all sides of a cube are reduced by 1/2, how does it affect volume? a. decreases 200% b. decreases 400% c. decreases 800% d. decreases 600% answer b
*October 30, 2013 by cici*

**solid mensuration**

The base of a right prism is a rhombus whose sides are 12 inch and whose longer diagonal is 15 inch. Find its volume.
*January 22, 2014 by nika*

**math 2**

a mannufactue ships its poducts in boxes with edges of 4 inches. if 12 boxes are put in a caton and completely fill the caton, what is the volume of the carton?
*March 3, 2014 by kimmy plus*

**Chemistry**

I'm not sure how to answer this question and how to set it up. To what volume should you dilute 90mL of a 10.5M H2SO4 solution to obtain a 1.65M H2SO4 solution?
*May 1, 2014 by J.J*

**Science - chemistry**

Calculate the volume of 0.05 M NaOH which must be added to 100 cm3 of 0.05 M methanoic acid to obtain a buffer of pH 4.23.(Ka for methanoic acid = 1.77 x 10-4)
*June 6, 2014 by Teagan*

**Chemistry**

GE's light bulb division ordered 100.kg of tungsten for the filaments. If the tungsten comes in a cube what is the volume of the cube? What is the length of each side?
*September 28, 2014 by Ray*

**math**

Find the volume of a can of soup that has a height of 16 cm and a radius of 5 cm. Use 3.14 for pi. A. 1,256.0 cm3 B. 251.2 cm3 C. 4,019.2 cm3 D. 502.4 cm3 im lost
*October 6, 2014 by LovelyCaity *

**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?
*May 20, 2007 by Jayd*

**Intro to Chemistry**

A substance X has the density of 0.359 g/mL at room temperature. What is the volume in mL of 25.0 g of the substance? Show calculation. -------------------------------------- I tried to cross multiply but I dunno...I'm getting some pretty crazy numbers. Any suggestions?
*January 6, 2008 by chrisalis*

**Chem**

I dont understand how Rutherford's gold foil experiment proved that the positive charge of the atom had a very small volume in comparison to the whole atom. Could someone explain this to me please?
*July 9, 2009 by Lena*

**physics**

Assuming biological substances are 90% water and the density of water is 100 kg/meter cubed, estimate the mass of a fly, which can be approximated by a cylinder 4 mm long and 2 mm in diameter (volume (length*pi*radius squared)
*September 19, 2010 by Mariah*

**Human Physiology**

A subject with a body weight of 60 kg was injected with 10 ml of a 1% (w/v) solution of Evans Blue. After 10 min, the blood was sampled and found to contain 0.035 mg ml^-1 of the dye. What is the subjects plasma volume in litres?
*November 8, 2010 by Dean*

**Physical science**

I need help with the gas laws (Boyle's, Charle's, Gay-Lussac's & the combined gas law). A sample of 6.00 liters of xenon is collected at 960 mm Hg and 50 degrees Celsius. What is the volume at STP?
*May 11, 2011 by Jacqueline*

**Geometry**

How do you calculate the volume of a right hexagonal prism. The height is 8cm and each section of base is 6cm. The answer is 748.2 CU I have been working on this problem for 30 minutes and cannot come up with the correct answer.
*May 17, 2011 by Mary *

**chemistry**

A 0.1375-g sample of magnesium is burned in a constant volume calorimeter tha has a heat capacity of 3024 J/C. the temperature increases by 1.126 C. calculate the heat given off by the burning Mg in kJ/g and kJ/mol
*October 21, 2011 by TROUBLED*

**calculus**

F(x)=e^(-3x/2) Let R be the region between the graph of f and the x-axis on the interval 0 to 1 . Find the volume V of the solid of revolution generated by revolving R about the x-axis. Give both exact (symbolic) and approximate (numeric) answers.
*November 28, 2011 by Dylan*

**Chemistry**

A 0.05 N solution of a salt occupying a volume between two platinum electrodes seprated by a distance of 1.72 cm an having an area of 4.5 cm2 has a resistance of 250 ohm. calculate equivalent conductance of a solution
*June 8, 2012 by Robin Singh Hayer*

**Chemistry**

A voltaic cell consists of Ag/Ag+2 electrode E= 0.80 and a Fe+2/Fe+3 electrode E=0.77 with the following initial molar concentrations: [Fe+2}= 0.30 M [Fe+3]= 0.10 M [Ag+]=0.30 M. What is the equilibrium concentration of Fe+3? (Assume the anode and the cathode solutions are of ...
*July 20, 2012 by Jackie*

**Chemistry **

How many moles of hydrochloric acid (pKa of HF=3.14) must be added to 500.0 mL of 0.30M sodium fluoride (NaF) to give a buffer of pH 3.50? Ignore the volume change due to the addition of hdrofluoric acid
*October 18, 2012 by Millie*

**CHEMISTRY**

24cm^3 of a mixture of methane and ethane were exploded with 90cm^3 of oxygen. After cooling to RTP the volume of gases was noted and it decreased by 32cm^3 when treated with KOH. Calculate the composition of the mixture.
*October 23, 2012 by LC*

**calc**

find the volume of the solid generated by revolving around the x-axis: y=e^(x-8), y=0, x=0, x=10 So I know you can use the washer method, but the shell method can also be used and it should be better. The issue is I'm not certain how to actually do it. Any help is appreciated!
*January 29, 2013 by Anonymous*

**calculus**

As viewed from above, a swimming pool has the shape of the ellipse given by (x^2/3600)+(y^2/1600)= 1 The cross sections perpendicular to the ground and parallel to the y-axis are squares. Find the total volume of the pool.
*January 30, 2013 by tyson*

**Math (PreAlgebra) 8thG**

Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number. V = (4/3)3.14(r)^3 = (formula) I don't know what to do about the fraction, four over three (4/3), in the formula.... Show me how to do this please?
*February 18, 2013 by LovelyDec0y*

**solid mechanics**

A steel block 200mm*20mm*20mm is subjected to a tensile force of 40kn in the direction of its length.Determine the change in volume,if Eis 205kn/mm square and poisson's ratio=0.3.
*July 25, 2013 by sushil*

**Geometry**

Find the missing numbers for the dimensions and measures of a rectangular prism... Length 5 m Width ? Height ? Surface Area 94 m to the second power Volume 60 m to the third power Please answer the one's with a ?. Thank you.
*December 9, 2013 by Susie*

**math**

find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line. x=2=2sqrty, x=0, y=9 about the y axis. Is this the disk or shells method and how do I set this problem up?
*August 4, 2014 by sara*

**chemistry**

A 8.80-g sample of solid SnCl22H2O was heated such that the water turned to steam and was driven off. Assuming ideal behavior, what volume would that steam occupy at 1.00 atm and 100.0 C?
*September 27, 2014 by himesh*

**chemistry**

A 8.50-g sample of solid AlCl36H2O was heated such that the water turned to steam and was driven off. Assuming ideal behavior, what volume would that steam occupy at 1.00 atm and 100.0 C?
*September 27, 2014 by A*

**chemistry**

A dilute solution of sulfiric acid is added to 15g of copper and iron mixture. a) the volume of h2 envolved at standard conditions is 4.48L what is the mass of each of the metals constituting the mixture ? Vm=24l.mol.
*October 18, 2014 by alaa*

**chemistry**

To what volume must a solution of 83.1 g H2SO4 in 505.3 mL of solution be diluted to give a 0.28 M solution? I do not understand this problem. Also as a hint the professor said to use M1V1= M2V2.
*April 28, 2011 by tina*

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