Monday

July 28, 2014

July 28, 2014

Number of results: 6,456

**chemistry**

Zinc reacts with hydrochloric acid according to the following equation: Zn + 2HCl --> ZnCl2 + H2 If 3.63 grams of zinc react, how many grams of zinc chloride is produced?
*May 22, 2012 by beryl*

**chemistry**

0.2 Grams of HCL is dissolved in 0.8g of water. The density of the solution formed is 1.10g/ml. What is the molarity of the solution???? %HCl = [0.2/0.2+0.8)]x100 = 20% Density = 1.10 g/mL. The mass of 1,000 mL is 1.10 g/mL x 1,000 mL = 1100 grams. Mass HCl in the 1100 g is ...
*February 5, 2007 by boo*

**Chemistry**

At 25 degrees celsius,one cm3 of iron mass of 7.62 grams. What volume of iron is occupied by 125 grams of iron
*July 21, 2011 by Pearl*

**Chemistry**

You have 11.20 grams of compound. It is known that the compound has a half-life of 3.8 days. HOw long will it take for the compound to decay to 0.350 grams?
*December 2, 2011 by Missy*

**chemistry**

You have 11.20 grams of a compound. It is known that the compound has a half-life of 3.8 days. How long will it take for the compound to decay to 0.350 grams?
*December 5, 2011 by Anonymous*

**chemistry**

Explain in word how you would prepae 250mL of a 3.000 M solution of Ba(OH)2 starting form barium hydroxide and water..... 2 equation 2CoI3 + 3 K2S= Co2S3 + 6KI 2 moles of Cobalt (III) iodide + 3 moles of Potassium sulfide = cobalt (III) sulfide + 6moles of Potassium Iodide ...
*October 10, 2010 by pete*

**CHEMISTRY**

if insulin has 6 cysteines, how many millimoles of IAA would be consumed in a blocking reaction containing 10 mmol of reduced insulin? mass of cysteine - 121 g/mol.
*January 30, 2008 by emi*

**Microeconomics**

Assume that the marginal utilities for the first three units of a good consumed are 200, 150, and 125 respectively. What is the total utility for the first unit?
*July 27, 2012 by Preston*

**Chemistry**

The nuclide 96Nb decays by a first-order process with a rate constant of 2.96 10-2 h-1. How long will it take for 85% of the initial amount of 96Nb to be consumed? I believe it is 5.07 hrs...
*January 21, 2013 by Jeremy*

**chemistry**

when 10.0 grams of an unknown substance is dissolved in 50. grams of water, the new freezing point becomes -3.00C. What is the molar mass of the compound? For this question can some one tell me the formulas I need to solve for this problem and I can fill in the rest
*March 7, 2010 by Ronnie*

**CHEMISTRY **

WHEN 92.50 MOL HYDROGEN REACTS, WHAT QUANTIY (MOL) OF NITROGEN IS CONSUMED AND WHAT QUANTITY (MOL) OF AMMONIA IS PRODUCED?
*September 26, 2011 by TROUBLED*

**Math**

Susan owns a chocolate store. She sells her chocolate by the gram and needs to compare the weights of two chocolate batches. She randomly selects 100 pieces from each batch. The distrubition of both samples are normal. Batch 1 - (Mean Weight) 56 grams Standard Deviation - 6 ...
*March 30, 2013 by Caroline*

**9th grade**

A student put 12.4 grams of potassium sulfate in 29 ml and stirred for 3 hrs. he saw that not all of the solid dissolved, so he removed the extra solid and found it had a mass of 3.4 grams. what was the solubility of the chemical?
*February 21, 2010 by Anonymous*

**college Chemistry**

After subtracting the weight of the container, the Vanadium metal inside is found to weigh 8.34 grams. After reacting with Oxygen the newly formed compound weighs 21.43 grams. What is the empirical formula?
*December 4, 2010 by Ivy*

**chemistry**

How many grams of gasoline would you need to burn if you started with 275 gram piece of ice that started at -25C and by the end of the expirement had 100 grams of steam and the rest liquid water?
*February 16, 2011 by reginajones*

**science**

if 8.100 grams of C6H6 is burned and heat is produced from the burning is added to 5691 grams of water at 21 degrees celsius what is the final temp of the water? 2C6H6+15O2=12CO2+6H2O+6524kj
*October 17, 2013 by lucy *

**chemistry**

If 23.5 grams of iron chloride are produced how many grams of iron did you start with?
*March 15, 2010 by Son*

**chemistry**

how many grams of H2O will be produced if 32.0 grams N2O are produced in the reaction ?
*June 28, 2012 by morgan*

**Chemistry**

I need the equation for determining how to decide : You are given a dosage of 30m/kg to be given every twelve hours, how much is given (in grams) with each dose. I know the answer is obviously 15 m/kg but what is it in grams?
*January 20, 2012 by Sara*

**ap chemistry**

We mix 146 grams of oxygen gas with 117 grams of argon gas in a volume of 436 mL at 58C. What will be the final pressure of the gas mixture? Answer in units of atm
*February 9, 2013 by cheri*

**chemistry**

Which liquid will float on water? Liquid A 25 mL weighs 22.3 grams. Liquid B- 30 mL weighs 33.3 grams Liquid C- 10 mL weighs 10.001 grams.
*June 25, 2011 by Anonymous*

**algebra**

Can someone please explain and help me with this problem. 4. The table shows the annual consumption of cheese per person in the United States for selected years in the 20th century. Year Pounds Consumed 1908 5.027 1923 8.768 1960 12.29 1981 15.485 What cubic model best fits ...
*November 14, 2012 by lee*

**Chemistry**

How many grams of BaCO3 will dissolve in 3.0 L of water containing a Ba+2 concentration of 0.5 M (Ksp= 5.1E-9) My work: BaCO3 <-> Ba+ + CO3- i 0.5 M c -s +s +s e 0.5 +s +s (s)(0.5+s)= 5.1E-9 s= 1.0E-9mol/L x 3.0 L x 197.336 g/L= 5.92E-6 grams of BaCO3 dissolved ^Is this ...
*May 14, 2011 by Kelly*

**chemistry**

From the following combustion: 1-butanol + oxygen+ carbon dioxide + water. How many grams of carbon dioxide and water are produced when 130.6 grams of 1-butanol is completely burned? I wrote out the equation and got C4H10) + 02= CO2 + H2O. i balanced the equation and got ...
*November 29, 2009 by Turtle Lover*

**earth science**

what would be the chart to use for carbon 14 whcih has a half life of 5730 years and a piece of wood which originally has 12 grams pf radioactive isotope; If the half lives occurred and now has 0.75 grams left?
*November 29, 2012 by lan*

**Chemistry**

In determing the simplest formula of lead sulfide, 2.46 grams of of lead are placed in a crucible with 2.00 grams of sulfur. when the reaction is complete, the product has a mass of 3.22 grams. What mass of sulfur should be used in the simplest formula calculation? Find the ...
*October 17, 2012 by Sharita*

**Chemistry**

In determing the simplest formula of lead sulfide, 2.46 grams of of lead are placed in a crucible with 2.00 grams of sulfur. when the reaction is complete, the product has a mass of 3.22 grams. What mass of sulfur should be used in the simplest formula calculation? Find the ...
*February 24, 2013 by Sarah*

**Pre-Calc**

Amount after time t A (t) = yobt Where: yo = starting amount b = growth constant (percent remaining) t = number of time units It is well known that superman can withstand as much as 3 grams of Green Kryptonite indefinitely. However, exposure to more than 3 grams for more than ...
*December 2, 2010 by Ann*

**biology**

for a lab it says prepare a 300 ml of .2% sodium bicarbonate solution. I am trying to find how many grams of NaHCO3 i need. so i did 300ml X .002 and got .6ml of NaHCO3. but how do I convert that to grams of NaHCO3
*March 2, 2013 by Sarah*

**Chemistry 130**

Will someone help me by letting me know if I did these correct, or if there the correct answers? Thanks! 2 (10). If two moles of hydrogen gas (H2) react in the following equation, how many moles of H2O will be formed? 2H2 + O2 2H2O a. 2 moles b. 4 moles c. 1 mole d. 8 moles...
*September 8, 2009 by Jessie*

**bio stats**

After a winter ice storm, 25 parrots are found sheltering in a tool shed. Ana traps the parrots, weighs them (average weight = 36 grams) and then feeds them. The next morning she find that 6 of the parrots have died. She weighs the dead ones (average weight = 20 grams) and the...
*April 26, 2009 by Frank Minimi*

**Chemistry**

Ammonia, NH3, and oxygen can be reacted together in the presence of a catalyst to form only nitrogen(II) oxide and water. The number of moles of oxygen consumed for each mole of NO that is produced is?
*May 12, 2010 by Chris*

**chemistry**

5. How many moles of magnesium were consumed in the reaction? Open the Data window and click on the flask to provide evidence that this answer is correct. 6. Could this experiment be performed in the smaller 50 mL Erlenmeyer flask?
*March 17, 2012 by Dee*

**Chemistry**

You have a chemical sealed in a glass container filled with air. The glass container has a mass of 200.0 grams and the chemical has a mass of 850 grams. The total mass of the setup is 1050 grams. The chemical is ignited by means of a magnifying glass focusing sunlight onto the...
*January 23, 2012 by Staci*

**chemistry**

You have a chemical sealed in a glass container filled with air. The glass container has a mass of 200.0 grams and the chemical has a mass of 800 grams. The total mass of the set-up is 1000 grams. The chemical is ignited by means of a magnifying glass focusing sunlight onto ...
*August 1, 2013 by Kris*

**chemistry**

How many grams of water would you add to 1.00 kg of 1.48 m CH3OH(aq) to reduce the molality to 1.00 m CH3OH. Use two sig figs. I get 4.8 * 10^2 grams and its not right. I want to put this up here again to see if there are any errors that could have possibly been made
*February 21, 2010 by david*

**chemistry**

How many grams of water would you add to 1.00 kg of 1.48 m CH3OH(aq) to reduce the molality to 1.00 m CH3OH. Use two sig figs. I get 4.8 * 10^2 grams and its not right. I want to put this up here again to see if there are any errors that could have possibly been made
*February 21, 2010 by david*

**Chemistry**

if 225 mLs of .50 molars of hydrofloric (HF) acid solution is reacted with 25.5 grams of solid zinc what is the most (in grams) aqueous zinc flouride that would be produced? Based on this, how much nonlimiting ractants will be left over?
*March 14, 2011 by Nicole*

**Physics(Please help, thank you)**

Using a force table the direction and magnitude had to be found for the following measurements: F1 = 200 grams at 30 degrees; F2 = 200 grams at 120 degrees The magnitude and direction found was 280 grams at 257 degrees. Using the magnitude and direction of F1 and F2 I need to ...
*September 24, 2012 by Hannah*

**Mass-mass**

How many grams of hydrogen gas are produced when 50.0 grams of zinc react with phosphoric acid, H3PO4 ? Equation:3 Zn +2 H3PO4--->3 H2+ Zn3(PO4)2
*March 30, 2009 by robb*

**physical science**

If you have 24 grams of an unstable atom with a half life of 5,000 years, how many grams would be left after 15,000 years?
*September 17, 2009 by Clarissa*

**physical science**

If you have 24 grams of an unstable atom with a half life of 5,000 years, how many grams would be left after 15,000 years?
*September 17, 2009 by Clarissa*

**chemistry please help!!**

for thr reation: 2AlCl3 + 3H2SO4= Al2(SO4)3 + 6 HCl How many grams of H2SO4 are needed to produce 27.0 grams of Al2(SO4)3
*November 14, 2010 by Lillian*

**high school chem**

How many grams of a stock solution that is 92.5 percent h2s04 by mass would be needed to make 250 grams of a 35% by mass solution?
*March 9, 2011 by Kayla*

**chemistry**

When 5 grams of salt is dissolved in 95 grams of water the temperature of the solution increases 10C how much heat is evolved the heat capacity of the solution is 1.1 cal/gC
*October 7, 2013 by Cheryl*

**math**

Eric has a two rocks samples. One has a mass of 600 grams and the other has a mass of 1 kilogram. He recorded the total mass as 7 kilogrmaas. Explain what he did wrong? What should be the correct answer in grams?
*March 25, 2014 by Math*

**Chemistry conversions check**

I'm sooooooo not sure if I'm doing this right, but can someone check it please? Thanks :)) 5) Determine the mass in grams of 3.01 x 10^23 atoms of Cl (element) I got 17.5 grams...is this right?
*September 10, 2009 by Emily*

**phy sci 101**

If you have 24 grams of an unstable atom with a half life of 5,000 years, how many grams would be left after 15,000 years
*March 5, 2010 by aida*

**9th grade**

How many grams of water must be added to 2 grams of a 65% iodine solution in order to produce a 42% iodine solution? Round your answer to the nearest tenth
*July 26, 2010 by SHAKAYLA*

**Chemistry**

A solution is made by dissolving 10.20 grams of glucose (C6H12O6) in 355 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 C/m?
*January 14, 2011 by Maria*

**chemistry**

A solution is made by dissolving 21.5 grams of glucose (C6H12O6) in 255 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 C/m?
*September 25, 2011 by ryan*

**chemistry**

Calculate the theoretical yield of the precipitate formed when a solution containing 1.02 grams of lithium phosphate is mixed with a solution containing 2.72 grams of strontium nitrate
*April 19, 2012 by Rayna*

**chem**

How many grams of ibuprofen contain 7.1x10^25 atoms of C? Ibuprofen is C13H18O2. Molar Mass is 206. The answer is=1870 grams. How do I calculate this to get this answer? Please help!
*May 7, 2012 by robyn*

**Chemistry**

A reaction that has been calculated to produce 60.0 grams of Copper (II) Chloride actually produces 50.0 grams of Copper (II) Chloride. What is the percent yield? A 0.833% B 96.1% C 83.8% D 120%
*May 24, 2012 by Jarel*

**chemistry **

190 grams of potassium iodide is placed in 100 cm3 at 60 degrees Celsius. the solution is cooled to 30 degrees Celsius. how many grams will settle out?
*September 19, 2013 by Cara*

**CHEMISTRY**

A solution contains 10.05 grams of an unknown covalent substance in 50.0 grams of water. The freezing point of this solution is (-) 3.16o C. What is the formula weight of the unknown compound?
*October 11, 2013 by NEHE*

**Math**

The weights of individual nails produced by the 'Hammer 'n Nail' hardware company follow a normal distribution with the average nail weight being 5.1 grams and the standard deviation in nail weight being 1.6 grams. When a nail is produced it is discarded if it weighs more than...
*September 28, 2010 by Louise*

**Chemistry- Drbob-help#3**

I still need help with #3 I'm not sure how I got 1.14M. I have tried to do the problem over, but I not coming up with my original answer of 1.14M. Somehow I am missing a step. Please show work for the 1.14M Thanks Question#9 reads exactly as written. A student makes a solution...
*February 10, 2011 by Paul*

**chemistry**

Copper (II) flouride contains 37.42% F by mass. Use this percentage to calculate the mass of flourine (in grams) contained in 35.6 g of copper (II)fluoride. --- How many grams of Cl are present in 55g of CFCl3?
*March 26, 2008 by Anonymous*

**chemistry**

According to the following reaction, how many grams of zinc hydroxide will be formed upon the complete reaction of 29.8 grams of water with excess zinc oxide? ZnO (s) + H2O (l) Zn(OH)2 (aq)
*March 31, 2012 by Anonymous*

**Chemistry**

a sample of an unknow metal exists as a perfect cube that meausres 0/78 in on a side and weighs 61.4 grams. what would be the mass, in grams, of a diff sample of this metal that has a volume of 25.0 cm^3
*September 18, 2012 by Helen*

**chem**

How many grams of NH4Cl must be added to 0.560 L of 1.90 M NH3 solution to yield a buffer solution with a pH of 8.50? Assume no volume change. Kb for NH3 = 1.8 10-5. i am confused as how to find the grams?
*March 19, 2013 by hannah*

**Chemistry**

AgNO3 + NaCl → AgCl + NaNO3 . How many grams of NaCl would be required to react with 446 mL of 0.211 M AgNO3 solution? Answer in units of grams
*February 21, 2014 by Zoey*

**AB Chemistry4**

4 HCl + MnO2 ==> MnCl2 + 2 H2O + Cl2 How many grams of MnCl2 are formed when 36.0 grams of water are also formed? DO we have to calculate mole mass first?
*May 17, 2014 by jody McHale*

**chemistry**

If the mass of copper wire used in your reaction was only 0.012 grams, but the amount of silver nitrate used was unchanged, then how many grams of silver metal could be produced?
*May 29, 2014 by toni*

**Chemistry**

How many grams of ice could be melted by the energy obtained as 18.0 grams of steam is condensed at 100.0 degrees celcius and cooled to 0.0 degrees celcius?
*March 3, 2008 by PLEASE*

**chemistry**

if 50 grams of a substance with temperature of 20 degrees C and a specific heat of 2 is mixed with 200 grams of water at 40 degrees C, what will be the equilibrium temperature of the mixture?
*February 24, 2011 by kassi*

**chemistry**

in a reaction of 3Cu(s)+ 8HNO3(aq) 3Cu(NO3)2(aq) +2NO(g) + 4H2O(l). if 5.58 grams of Cu(no3)2 is made how many grams of nitrogen monoxide is present
*October 12, 2012 by robert*

**chemistry**

it says "how many joules of energy would be required to heat 29.8 grams of carbon from 25.5 C to 79.3 C. (s= .71 Joules / grams times carbon) & the formula is Q= M x C x delta T .
*September 30, 2013 by David *

**chemistry**

it says "how many joules of energy would be required to heat 29.8 grams of carbon from 25.5 C to 79.3 C. (s= .71 Joules / grams times carbon) & the formula is Q= M x C x delta T .
*September 30, 2013 by David *

**chemistry**

it says "how many joules of energy would be required to heat 29.8 grams of carbon from 25.5 C to 79.3 C. (s= .71 Joules / grams times carbon) & the formula is Q= M x C x delta T .
*September 30, 2013 by David *

**chemistry**

if 2.0 grams of sodium sulfate are mixed with 2.0 grams of calcium chloride to produce calcium sulfate as a precipitate, which compound is the limiting reactant
*October 19, 2013 by Anonymous*

**general chem**

what is the mass percent of sodium hydroxide in a solution that is made by dissolving 8 grams of sodium hydroxide in 50 grams of h2o answer
*July 7, 2014 by Anonymous*

**chemistry**

Hvap 40.65 kJ/mol Hf -285.83 kJ/mol Hfusion 6.03 kJ/mol specific heat 4.186 J/gC molar mass 18.02 g How much energy is consumed by thawing 4.3 g ice?
*June 28, 2012 by martin*

**chemistry**

Hvap 40.65 kJ/mol Hf -285.83 kJ/mol Hfusion 6.03 kJ/mol specific heat 4.186 J/gC molar mass 18.02 g How much energy is consumed by thawing 4.3 g ice?
*June 28, 2012 by martin*

**Chemistry**

a compound decomposes with half life of 8seconds and is independent of concentration.how much time is consumed to convert the concentration of one sixteenth of its initial concentration?
*October 23, 2012 by Maria *

**chemistry **

The theoretical yield of a reaction is 78.5 grams of product and the actual yield is 66.3 grams. What is the percent yield?
*December 11, 2012 by Anonymous*

**Chemistry**

A sheet of aluminum foil has a total area of 1.000 ft squared and a mass of 3.636 grams. What is the thickness of the foil in millimeters? (Density of Aluminum is 2.699 grams/cm cubed.)
*September 12, 2008 by Paige*

**College Chem**

How many liters of carbon dioxide at 20 oC and 750 torr are produced when one gallon of toluene is burned? Convert liters to milliliters and then to grams. can you convert mil to grams?
*October 3, 2010 by Dan*

**chemistry**

Calculate the solubility (in grams per 100 mL of solution) of magnesium hydroxide in a solution buffered at pH = 12. I can get the answer in grams per mole, but i am having difficulty changing it to g/100ml.
*November 1, 2010 by moe*

**Calculate Osmotic Pressure**

69.7 grams of a solute with a molecular mass of 2790 grams are dissolved in enough water to make 1.00 dm3 of solution at 20 degrees C. What is the osmotic pressure of the soluton?
*December 7, 2010 by Jose Reyes*

**chemistry**

Each 375 mL of an orange drink contains 3.0 grams of protein. In order to consume 11 grams of protein, how many mL would you have to drink? Give your answer in mL to the nearest whole number.
*June 16, 2011 by Anonymous*

**chemistry**

an original sample of K-40 has a mass of 25.00 grams. After 3.9x 10 to the ninth years, 3.125 grams of the original sample remains unchanged. What is the half-life ok K-40 in minutes? Is it 6.8328 x 10 to the 14th
*January 16, 2012 by micky*

**math**

how do you calculate theoretical yield of something? I don't know where to find the formula You go to the balanced chemical equation, and look at the mole ratio between the reactants and products. The theoretical yield is the value calculated from stoichiometry of a reaction. ...
*January 31, 2007 by james*

**Org. Chem.**

A natural product (MW=150) distills with steam at a boiling temperature of 99 degrees Celsius at atmospheric pressure. The vapor pressure of water at 99 degrees Celsius is 733 mm Hg. A) Calculate the weight of the natural product that codistills with each gram of water at 99 ...
*November 10, 2009 by CMM*

**ecology**

I am questioning the result of my ecent classroom experiment...please help:I am testing to see if CO2 is released or consumed: 4 tubes with phenol red in all. 1 added elodea plant and placed in bright light 1 nothing added to the phenol red placed in same bright light 1 added ...
*May 4, 2009 by Ashley*

**Science**

There is 40% of oxygen. If your mineral sample has a mass of 10g, how many grams of oxygen does it have. wouldn't it have 4 grams? yes, exactly right.
*December 10, 2006 by Katie*

**math**

cesar bought 2 bags of flower that each weighed a kilogram and another bag that weighed 500 grams.how many grams of flower did he buy?
*April 7, 2011 by Caitlin*

**science: chemistry**

How much faster will neon effuse than krypton, given that the molar mass of krypton is 83.8 grams and that of neon is 20.18 grams?
*July 15, 2011 by Jane Doe*

**AP CHEMISTRY**

Calculate the solubility of Mn(OH)2 in grams per liter when buffered at each of the following. a) pH 7.4 b) pH 9.2 c) pH 11.5 ALL IN GRAMS PER LITER. PLEASE HELP ME AND EXPLAIN
*March 12, 2012 by HELP PLEASE*

**Chemistry**

A gas mixture contains 4.00 grams of O2 and 4.00 grams of He. If the total pressure of the gas sample is 4.67 atm, what is the partial pressure of each component?
*April 18, 2012 by Anna*

**Chemisty**

how many grams of oxygen gas will be required to react completely with 92.0 grams of solid sodium to form solid sodium oxide?
*February 28, 2013 by Tamra*

**Chemistry**

A chunk of copper weighing 18.9 grams and originally at 97.63oC is dropped into an insulated cup containing 77.9 grams of water at 22.44oC. Assuming that all of the heat is transferred to the water, the final temperature of the water is what in C.
*February 19, 2010 by Jackson*

**Chemistry**

If a solution containing 52.044 g of mercury(II) chlorate is allowed to react completely with a solution containing 15.488 g of sodium sulfate, how many grams of solid precipitate will be formed? How many grams of the reactant in excess will remain after the reaction? I have ...
*October 13, 2013 by Chelsea*

**Chemistry**

can someone check my answers thank you. 1)How many grams of hydrochloric acid are required to react completely with 4.30 grams of zinc? answer: 0.1328 g H2 2)How many molecules of gas will be produced? answer: 0.395x10^23 molecules
*January 10, 2008 by Mike*

**physics**

The energy given off by 300 grams of an alloy as it cools through 50C raises the temperature of 300 grams of water from 30C to 40C. The specific heat of the alloy (in cal/g C ) is: i know Q=CpM(delta T) but what is what?
*June 22, 2009 by jane*

**chemistry**

Refer to 3CuCl2 (aq)+2Na3PO4 (aq) = Cu3(PO4)2+6NaCl (aq) If a student started with 18 grams of CuCl2 and enough Na3PO4 to completely react, how many grams of Cu3(PO4)2 will (theoretically) be produced?
*October 16, 2011 by Carly*

**Chemistry**

Zinc and sulfur react to form zinc sulfide according to the equation Zn+S=>ZnS a) How many grams of ZnS will be formed? b) How many grams of the excess reactant will remain after the reaction is over?
*March 8, 2012 by Annie*

**chemistry**

I have to find the theoretical yield of acetylsalicylic acid in the exeriment? I used 5.0 mL acetic anhydride which is about 5.40 grams. When I calculated the theoretical yield, I got 9.53 grams. Is this number correct?
*April 4, 2012 by casey*

**Math-Exponential Decay**

A lab technician had 58 grams of a radioactive substance. Ten days later, only 52 grams remained. Find the half-life of the radioactive substance.
*May 12, 2014 by Anonymous*

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