Wednesday

July 30, 2014

July 30, 2014

Number of results: 57,221

**fluid**

3. A students boot pressure on the ground is 5 pounds per inch squared. how many inches squared will be required to set off a landmine with a set pressure 40 pounds? 4. Calculate the pressure exerted by the atmosphere on a cubic square can with 6 sides of dimensions of 10 x 10...
*October 9, 2011 by brian baldwin*

**intro to chemistry (college)**

A 64.8 g mixture of the compounds potassium sulfide and calcium oxide is 17.1 % by mass potassium sulfide. The compound calcium oxide is 71.5 % by mass calcium. Calculate the mass (g) of oxygen in the mixture. mass % = mass part/mass whole x 100. I attempted the problem by ...
*May 3, 2012 by James*

**chemistry**

Determine the number of bromide ions in solution when 4.23 g of magnesium bromide and 1.21 g of potassium bromide are dissolved in 120mL of water. Please explain not sure how to even start this problem, thanks! chemistry - DrBob222, Wednesday, December 8, 2010 at 7:57pm ...
*December 8, 2010 by Stacy*

**physics wave**

A) Show that the average rate with which energy is transported along a cord by a mechnical wave of frequency f and amplitude D is: P(average) = 2(pi^2)u v(f^2)(D^2) v is speed of the wave u is the mass per unit length (M/L) B) If the cord is under a tension Ft =100 N and has ...
*May 1, 2008 by Anonymous*

**Chemistry**

3) The chemical formula for ethylene glycol (antifreeze) is C2H6O2 and Isopropyle alcohol is C3H7OH. Calculate the new boining and freezing oints for 1000.0 g of aqueous solution (total volume), that is 30.0% solute (the antifreeze and the alcohol are the solutes). You will ...
*May 19, 2011 by Adam*

**Maths**

In order to make some home improvements, a home owner spent $40,000. He paid 20% as a down payment and financed the balance of the purchase with a 36-month fixed installment loan with an APR of 7.5%. Determine the home owner’s a) total finance charge and b) monthly payment.. ...
*March 6, 2008 by Marty*

**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*

**home economics**

a material handling company pays each of its sale persons a base salary plus a percentage of revenue generated. To reduce overhead EFI has switched from giving each salesperson a company car to reimbursing them .35 for each business related mile driven. Accounting records show...
*March 11, 2008 by cheer1*

**managerial economics**

a material handling company pays each of its sale persons a base salary plus a percentage of revenue generated. To reduce overhead EFI has switched from giving each salesperson a company car to reimbursing them .35 for each business related mile driven. Accounting records show...
*March 11, 2008 by cheer1*

**environmental science**

Starting with a hypothetical population of 14,000 people and an even age distribution (1,000 in each age group from 1-5 to 66-70 years), assume that the population initially has a total fertility rate of 2.0 and an average life span of 70 years. Using the spreadsheet for ...
*March 28, 2010 by sarah*

**Chemistry**

This is for a titration, to measure the amount of acid that can be neutralised by gaviscon. I know how to work out the first 3 but I'm not sure on the others. I think i need to use the calculation c=n x v but i don't know where and why? Theory. How do you work them out? (i)...
*December 9, 2008 by Anonymous*

**business accounting**

the long distance company that you use charges $5.00 per month and $0.10 per minute per call. If your current bill is $25.00, how many minutes did you use?
*November 13, 2013 by Passaic county *

**maths**

The linear equation F=ac + b is used to change temperature from degrees Celsius (°C) to degrees Fahrenheit (°F). Given that 0°C = 32°F and 100°C = 212°F, calculate the constants a and b.
*November 13, 2010 by Jannie*

**physics**

a ball of mass 100 g moves with a velocity of 200m/s and strikes the player comes to rest in o.o1 seconds.calculate the acceleration of the ball
*December 22, 2011 by rocking*

**physics**

You measure a quantity, say A, and it has a 1% uncertainty. If you calculate the value of 100A, its uncertainty will be a. 100% b. 10% c. 1% d. Need more information since it depends on what A is.
*January 19, 2012 by lalala*

**Statistic for healthcare professional**

for the following data, calculate the difference between the means distribution parameters. n1=25,n2=36,s1 to the nd power=50,s2 to the nd power=72, M1=100,M2=105
*September 15, 2012 by CArline*

**Chemistry**

At a certain temperature, 0.700 mol of SO3 is placed in a 3.50-L container. At equilibrium, 0.100 mol of O2 is present. Calculate Kc. 2SO3=2SO2 +)2
*January 19, 2013 by Paul*

**ap chemistry**

The volume of 0.100 mol of helium gas at 34°C is increased isothermally from 1.00 L to 4.50 L. Assuming the gas to be ideal, calculate the entropy change for the process.
*April 12, 2013 by sarah*

**chemistry**

Given this data in a study on how the rate of a reaction was affected by the concentration of the reactants Initial Rate, RUN #(A, M) (B, M) (C, M) (mol L-1 s-1 1 0.200 0.100 0.600 5.00 2 0.200 0.400 0.400 80.0 3 0.600 0.100 0.200 15.0 4 0.200 0.100 0.200 5.00 5 0.200 0.200 0....
*February 18, 2012 by elvis*

**Chemistry**

If 1.000 kcal of heat is added to 1.700 L of oxygen in a cylinder at constant pressure of 1.00 atm, the volume increases to 2.100 L. Calculate the total energy change for this process.
*October 8, 2007 by Raj*

**HChemistry**

A piece of zinc with a mass of 0.100 g reacts with 20.0 mL of 6.0 M HCl at a temperature of 25 C and a pressure of 750 mm Hg in 600 seconds. Calculate the average rate at which the hydrogen gas is produced in mL/sec.
*February 22, 2011 by mbm*

**chemistry**

In a recrystallization of vanillin, can you purify a substance whose solubility decreases as the temperature increases?
*June 23, 2008 by Anonymous*

**Chemistry - Solutions**

Do all solutes show an increase in solubility with increasing temperature? Explain.
*October 26, 2007 by Dick Rogers*

**Chemistry - Solutions3**

Why do you think there is such a big difference in the solubility of different solids in water?
*October 26, 2007 by Dick Rogers*

**Chemistry**

The solubility of borax is directly proportional to temperature. Therefore, the sign of H is A. negative B. positive
*August 8, 2008 by Blair*

**Chemistry**

Find the molar solubility of silver sulfide Ag2S. Ksp is 6.0 x 10^-51. I get 1.1 x 106-17. Right?
*May 6, 2010 by Jim*

**chemistry**

Relative to pure water, what can you expect for the solubility of AgF in .10 M Hcl? Explain please....
*November 30, 2010 by Anonymous*

**Chemistry**

Give a real life scenario in which solubility is important that does NOT involve salt and water.
*March 11, 2013 by Juan*

**Economics**

The firm currently uses 50,000 workers to produce 200,000 units of output per day. The daily wage per worker is $80, and the price of the firm’s output is $25. The cost of other variable inputs is $400,000 per day. Assume that total fixed cost equals $1,000,000. Calculate the ...
*May 23, 2011 by Angela*

**science**

tori wants to increase the tempreature of 500 grams of water from 20 degrees celcius to 100 degrees celecius if the specific heat of water is 4.18j/g. degrees celcius how much heat is needed ?
*March 1, 2011 by nikita*

**Science - chemistry**

The SO2 present in air is mainly responsible for the phenomenon of acid rain. The concentration of SO2 can be determined by titration against a permanganate solution of known concentration as follows: SO2 + MnO4^-1 -> SO4^-2 + Mn2+ (unbalanced) Balance the equation showing ...
*June 8, 2014 by Teagan*

**Chemistry - please help**

Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS = 7O2 --> 2Fe2O3 + 2SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS / 0.266 mol = 7mol O2/ ...
*May 23, 2008 by Sarah H*

**Chemistry - please help**

Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS = 7O2 --> 2Fe2O3 + 2SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS / 0.266 mol = 7mol O2/ ...
*May 23, 2008 by Sarah H*

**chemistry**

A galvanic cell consists of an electrode composed of nickel in a 1.0 M nickel(II) ion solution and another electrode composed of silver in a 1.0 M silver ion solution, connected by a salt bridge. Calculate the standard potential for this cell at 25 °C. Standard reduction and ...
*February 27, 2012 by katie*

**chemistry**

A galvanic cell consists of an electrode composed of nickel in a 1.0 M nickel(II) ion solution and another electrode composed of silver in a 1.0 M silver ion solution, connected by a salt bridge. Calculate the standard potential for this cell at 25 °C. Standard reduction and ...
*February 27, 2012 by katie*

**Chemistry**

A solution is prepared by adding 50.3 mL of concentrated hydrochloric acid and 16.6 mL of concentrated nitric acid to 300 mL of water. More water is added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution. [Hint: Concentrated HCl is 38% HCl...
*February 28, 2012 by Andre*

**Chemistry**

A solution is prepared by adding 47.3 mL of concentrated hydrochloric acid and 16.3 mL of concentrated nitric acid to 300 mL of water. More water is added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution. [Hint: Concentrated HCl is 38% HCl...
*May 21, 2012 by Andrew*

**Finance**

You are considering opening a new plant. The plant will cost $100 million upfront. After that, it is expected to produce profits of $30 million at the end of every year. The cash flows are expected to last forever. Calculate the NPV of this investment opportunity if your cost ...
*July 20, 2010 by Anonymous*

**statistics**

the daily milk production for a certain type of dairy cow has a mean of 43 pounds per day with a standard diviation of 5 pounds per day. Suppose this daily mild production has a normal distribution. Calculate the probability that a randomly selected cow of this type has a ...
*July 17, 2014 by bob*

**Algebra**

If y varies directly with x, and y = 110 when x = 100, find the constant of variation k. If y = kx, then 110 = k*100. Solve for k. Check my thinking. Wouldn't I divide 110 by 100=1.1? yes
*July 29, 2007 by Lynn*

**Math - Finance**

Product A This product will take 2 years to develop, at a cost of $100,000 in the first year (Yr 0) and $50,000 in the second. Revenue (benefits) in subsequent years is expected to be $100,000 per year. Product B This product will only take a year (Yr 0) to develop, at a cost ...
*September 21, 2013 by gboy- Help please*

**chemistry**

Copper (2) fluoride contains 37.42% F by mass. calculate the mass of fluorine (in grams) contained in 35.6 g of copper(2) fluoride.
*March 24, 2008 by Anonymous*

**chemistry**

Copper (2) fluoride contains 37.42% F by mass. calculate the mass of fluorine (in grams) contained in 35.6 g of copper(2) fluoride.
*March 24, 2008 by Anonymous*

**Chemistry**

Copper (II) fluoride contains 37.42%by mass. Calculate the mass of fluorine(in grams)contained in 55.5 g of Copper(II) Fluoride.
*February 27, 2011 by Trudy*

**math **

what rule relating time and distance can help me calculate the traveled for 950 miles in bus at 60 miles per hour?
*January 30, 2011 by monserrate*

**Chemistry**

Calculate the enthalpy of combustion of acetylene(per mol acetylene)using bond enthalpies and energy diagram
*August 5, 2011 by Gift*

**Chemistry**

Calculate the enthalpy of combustion of acetylene(per mol acetylene) using bond enthalpies and energy diagram
*August 5, 2011 by Gift*

**maths**

it cost $2592.00 to fence a square field wire cost $18.00 per metre calculate area and side
*May 5, 2013 by Anonymous*

**Finance**

Campus Print Shop is thinking of purchasing a new, modern copier that automatically collates pages. The machine would cost $22,000 cash. A service contract on the machine, considered a must because of its complexity, would be an additional $200 per month. The machine is ...
*April 3, 2007 by Jackie*

**calculus**

a ball is thrown upward at 96 feet per second from the top of a 100 foot building. 1.when will the ball obtain maximum height 2. when will the ball hit the ground?
*October 24, 2011 by chris*

**chem**

If 0.752 g of pure sodium carbonate was dissolved in water and the solution titrated with 25.90 mL of hydrochloric acid to a methyl orange end point, calculate the molarity of the hydrochloric acid solution. (Hint: This process takes the carbonate ion to carbon dioxide.) Do I ...
*April 3, 2011 by Beth*

**chemistry**

A 1.2431 -g alloy sample was analyzed for its copper content iodometrically. The alloy was dissolved in hot, concentrated nitric acid and prepared for analysis. The addition of excess KI(aq) solution precipitated the copper as cuprous iodide and liberated elemental iodine ...
*April 4, 2011 by tara*

**Chemistry/stoichiometry**

If you can do just one for me I can used it as a template to do the rest. Thank you in advance For each reaction, calculate the mass (in grams) of the product formed when 10.3 of the underlined reactant completely reacts. Assume that there is more than enough of the other ...
*October 26, 2012 by Dale *

**Chemistry**

1) Calculate the energy. in joules, of a photon of wavelength 1.250x 10^3 nm 2) If 3.011x 10^23 molecules have a mass of 20.04 grams, what is the molar mass of the substance? Is it 40.07g/mol? 3) 47.5g of Boron contains __________ atoms of B? Is it 2.65x10^24 4) What is the ...
*February 15, 2014 by Annabelle*

**Precalculus**

Calculate the solution set. x^2+y^2+8x=-15 9x^2+25y^2=225 My work: I did elimination...multiplied -25 to the top equation and got..... -16x^2-200x-600...I then used quadratic formula ... And got -7.5 and -5..... Is -7.5 an EXTRANEOUS SOLUTION because when I plugged -7.5 in for...
*May 24, 2014 by Anonymous*

**Math**

A juice concentrate containing 65% solids is added to a single-strength juice solution(containing 15% solid), in order to generate a final product which contains 45% solids. Calculate the amounts required for the concentrate and for the single strength solution to produce ...
*February 7, 2012 by Janice*

**Chemistry**

Which one of the following pairs of 0.100 mol L-1 solutions, when mixed, will produce a buffer solution? A. 50. mL of aqueous CH3COOH and 25. mL of aqueous CH3COONa B. 50. mL of aqueous CH3COOH and 25. mL of aqueous HCl C. 50. mL of aqueous NaOH and 25. mL of aqueous HCl D. 50...
*May 2, 2010 by Macky*

**Arithmetic**

Whichh is cheaper of the 2 following boxes?: One liter (1000 ml) per bottle, 12 in a box: $60 per box OR: Three quarter (750 ml) liter per bottle, 12 in a box: $40 per box thank you so very much!
*April 12, 2010 by Rosedala*

**math**

the grade of a road is its slope given as a percent. for example, a road with a 6% grade has a slope 6/100. it rises 6 feet for every 100 feet of horizontal run. describe a 100% grade. Do you think you could drive up it?could you walk up it? Is it possible for a grade to be ...
*November 14, 2011 by manal HELP ME *

**Chemistry**

A 0.225g sample of a weak monoprotic acid requires 37.50 mL of 0.100 M NaOH solution to reach the equivalence point. What is the molar mass of the acid?
*April 11, 2011 by Sarah*

**science**

100 ml of 0.02 M acetic acid (pKa= 4.76) is titrated with 0.02 N KOH. After adding some base to the acid solution, the observed pH is 2.76. At this pH degree of protonation is
*April 15, 2011 by kavin*

**Chemistry**

A 16.0 g sample of a compound known to contain 3 ion species is dissolved in 100. g of water. The boiling point of the solution is 103.1°C. What is the molar mass of the compound?
*September 11, 2013 by Jade*

**environmental science for college**

Starting with a hypothetical population of 14,000 people and an even age distribution (1,000 in each age group from 1-5 to 66-70 years), assume that the population initially has a total fertility rate of 2.0 and an average life span of 70 years. Using the spreadsheet for ...
*March 28, 2010 by sarah*

**Physics**

A chunk of metal with a mass of 81.1 grams and a specific heat of 153 joules per kilogram·kelvin is heated to 95.7 degrees Celsius and placed in 144 milliliters of water at 19.5 degrees Celsius. What are the final temperatures of the metal and the water?
*December 12, 2013 by Matt*

**math**

Help. I have not done math in a long time. I need help making the equation. I will be able to complete the equation if I only knew how to write out the equation. At a depth of x feet under water, the pressure in pounds per square inch is .43x + 14.7. What is the pressure in ...
*April 14, 2007 by Dean*

**chemistry**

a sodium hydroxide solution was prepared according to the procedure outlined in this weeks experiment. This sodium hydroxide solution was standardized by by titration against exactly 10mL of a 0.28M hydrochloric acid solution. In three titrations, the volumes of the sodium ...
*November 25, 2012 by Kacie*

**math**

I know that on this forum you can't graph but can someone help me with where to plot my lines... Here is the question and my solution...(need to shade solution)will draw two lines(solid) and shade below but need to verify line equation points A small company produces both ...
*August 12, 2007 by Dori*

**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 Lab**

You are given 350 mL a stock solution of 1.66E-02 M benzoic acid, MW = 122.125 g/mol. Answer the following questions. A. What is the number of moles present in the original stock solution? B. You need to dilute the benzoic acid stock solution to 1.24E-03 M. If you need 455 mL ...
*January 11, 2011 by Natasha*

**Chemistry Lab**

You are given 350 mL a stock solution of 1.66E-02 M benzoic acid, MW = 122.125 g/mol. Answer the following questions. A. What is the number of moles present in the original stock solution? B. You need to dilute the benzoic acid stock solution to 1.24E-03 M. If you need 455 mL ...
*January 11, 2011 by Natasha*

**chemistry**

suppose you have an unlimited supply of copper (II) chloride to react with iron. How many moles of copper would be produced by reacting 34 grams of iron with the copper(II) chloride solution?
*October 29, 2010 by sarah*

**College Level Calculus**

Each orange tree grown in California produces 720 oranges per year if not more than 20 trees are planted per acre. For each additional tree planted per acre, the yield per tree decreases by 15 oranges. How many trees per acre should be planted to obtain the greatest number of ...
*November 12, 2013 by Timofey*

**Algebra**

THe function h(t)=-16t^2+v0t+h0 describes the height in feet above the ground h(t) of an object thrown vertically from a height of h0 feet, with an initial velocity of v0 feet per second, if there is no air friction and t is the time in seconds sine the object was thrown. A ...
*April 19, 2010 by Joe *

**Algebra**

THe function h(t)=-16t^2+v0t+h0 describes the height in feet above the ground h(t) of an object thrown vertically from a height of h0 feet, with an initial velocity of v0 feet per second, if there is no air friction and t is the time in seconds sine the object was thrown. A ...
*April 19, 2010 by Joe *

**chemistry**

Suppose that you have an unlimited supply of copper 2 chloride to react with iron. How many moles if copper would be produced by 34.0 grams of iron with the copper 2 chloride solution
*October 29, 2012 by shelbie*

**chemistry**

Suppose that you have an unlimited supply of copper 2 chloride to react with iron. How many moles if copper would be produced by 34.0 grams of iron with the copper 2 chloride solution
*October 29, 2012 by shelbie*

**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*

**Physic Check**

These are questions I'm unsure about out of 20 for my submission #2. Someone please check soon. My answers have an =. 1.)A ball is rolling across the top of a billiard table and slowly rolls to a stop. How would Galileo explain the motion of the ball as it stopped? a)The ball'...
*July 12, 2010 by Ariel*

**thermal physics**

What mass (in grams) of steam at 100°C must be mixed with 340 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 12.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent heat of ...
*March 23, 2009 by chirayu*

**thermal physics**

What mass (in grams) of steam at 100°C must be mixed with 340 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 12.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent heat of ...
*March 25, 2009 by chirayu*

**HELP URGENT Phyiics**

What mass (in grams) of steam at 100°C must be mixed with 446 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 65.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent heat of ...
*April 12, 2013 by HELP*

**physical mod**

What mass (in grams) of steam at 100°C must be mixed with 462 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 40.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent heat of ...
*September 13, 2013 by adrian*

**algebra**

Train A and B are traveling in the same direction on a parallel track. Train A is traveling at 100 miles per hour and train B is traveling at 120 miles per hour. Train A passes a station at 2:20 pm. If train B passes the same station at 2:35pm, at what time will train B catch ...
*May 6, 2009 by snuggles*

**chemistry**

If you have 12 moles of a substance, how many molecules do you have of that substance? Suppose the substance has a molecular weight of 342. How many grams of that substance would you have to dissolve in a liter of water to make a 12 M solution?
*September 3, 2011 by VANESSA*

**confirm math answers**

I have 3 problems I need my answers confirmed for. The solution for log subscript 3 1/9 = x is the solution -1/2? Secondl, what is the solution for 9^2x = 3^x+6 does x=2? Lastley is the answer to 3 ^5x+2 = 81 does x= 2/5? Help sincerely appreciated! The solution for log ...
*January 13, 2007 by trish*

**Chemistry**

C2H2(g) + 2 H2(g)--> C2H6(g) Substance So (J/mol∙K) ∆Hºf (kJ/mol) C2H2(g 200.9 226.7 H2(g) 130.7 0 C2H6(g) -- -84.7 Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 If the value of the standard entropy change, ∆Sº for the reaction is -232.7 ...
*January 11, 2011 by Brenda*

**Chemistry**

C2H2(g) + 2 H2(g)--> C2H6(g) Substance So (J/mol∙K) ∆Hºf (kJ/mol) C2H2(g 200.9 226.7 H2(g) 130.7 0 C2H6(g) -- -84.7 Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 If the value of the standard entropy change, ∆Sº for the reaction is -232.7 ...
*January 12, 2011 by Brenda*

**chemistry**

C2H2(g) + 2 H2(g)--> C2H6(g) Substance So (J/mol∙K) ∆Hºf (kJ/mol) C2H2(g 200.9 226.7 H2(g) 130.7 0 C2H6(g) -- -84.7 Bond Bond Energy (kJ/mol) C-C 347 C=C 611 C-H 414 H-H 436 If the value of the standard entropy change, ∆Sº for the reaction is -232.7 ...
*January 13, 2011 by Brenda*

**calculus**

Hi i need help in this. Some of the parts i got the answer but some i don't. please help! A ship uses $(7v^2) of fuel per hour when travelling at a constant speed of v km/h. Other expenses in operating the ship (i.e. crew and equipment) amount to $345 per hour. The ship makes ...
*August 12, 2012 by Becky*

**Business Math Question**

Find the finance charge per $100 on a loan of $12,600 with a finance charge of $1,638.
*November 8, 2012 by Will*

**Calculus**

State the growth factor in each of the following situations. Canada's population is increasing by 1% per year. How do I calculate this? I think Im supposed to use this formula, but I dont know where to plug in what. tn = ar^n-1
*September 21, 2011 by Anonymous*

**Calculus HELP**

State the growth factor in each of the following situations. Canada's population is increasing by 1% per year. How do I calculate this? I think Im supposed to use this formula, but I dont know where to plug in what. tn = ar^n-1
*September 21, 2011 by Anonymous*

**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*

**Algebra**

Suppose a 2% acid solution is mixed with a 3% acid solution. Find the percent of acid in each mixture. -a mixture that contains an equal amount of 2% acid solution and 3% acid solution -a mixture that contains 3 times more 2% acid solution than 3% acid solution
*December 29, 2011 by Anonymous*

**Algebra**

Suppose a 2% acid solution is mixed with a 3% acid solution. Find the percent of acid in each mixture. -a mixture that contains an equal amount of 2% acid solution and 3% acid solution -a mixture that contains 3 times more 2% acid solution than 3% acid solution
*December 30, 2011 by Anonymous*

**Chemical Reaction Engineering**

The following elementary first-order reactions occur at constant density: k1 k2 A --> B --> C k1 = 5 hr-1 k2 = 4 hr-1 CA0 = 1 mol/lit CB0 = CC0 = 0 v0 = 20 m^2/min Find the maximum production rate of B in moles per minute and the optimum for (a) a plug flow reactor (b...
*November 15, 2012 by Susan*

**Macroeconomics**

Can someone please help me with this? Since fall of 2004, rising oil prices have frequently ended stock market rallies and led to declines in all major stock indexes. Draw an AS/AD diagram which shows the effect on the US macroeconomy of oil at a high price such as $100 per ...
*February 29, 2008 by Macro_Econo*

**Chemistry**

What is the H+ ion concentration of this solution? A solution is made by dissolving 0.0112 g KOH in enough water to make 1.0 liter of solution. What is the H+ ion concentration of this solution? a. ) 2.0 x 10-3 M b. ) 8.0 x 10-2 M c. ) 1.2 x 10-13 M d. ) 5.0 x 10-11 M e. ) 5.0...
*November 3, 2008 by Angelo09*

**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*

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