# Calculate the pH of the solute in an aqueous solution of 0.0047 M codeine, if the pKa of itsconjugate acid is 8.21. What is the percentage protonation of the solute?

46,915 questions, page 418
1. ## Calculus

1. Use the Taylor series to calculate the limit. Problem: limit as x approaches 0 is equal to (1-cos(x))/(1+x-e^x). I did the problem out but I need help in seeing if its correct. limit as x approaches 0 is equal to (1-cos(x))/(1+x-e^x)=

asked by Joshua on April 28, 2009
2. ## Accounts

The current liabilities of Mohit Ltd are Rs. 150000 and its current ratio is 3:1 and liquid ratio is 1:1. Calculate the value of current assets, liquid assets and stock of Mohit ltd.

The current liabilities of Mohit Ltd are Rs. 150000 and its current ratio is 3:1 and liquid ratio is 1:1. Calculate the value of current assets, liquid assets and stock of mohit ltd?

asked by rinky on January 14, 2016
4. ## math

the current liabilities of mohit ltd.are Rs. 150000 and its current ratio is 3:1 and liquid ratio is 1:1 . Calculate the value of current assets ,liquid assets and stock of Mohit Ltd.

asked by Khemraj on August 9, 2016
5. ## Math

The area of a plot of land on map A is 800cm^2. Calculate the area of the same plot of land on map B which has a scale of 1:5000. (Scale of map A is 1:3400)

6. ## English

What can we do to save seashores and the sea? People polluted the seashores and the sea, so sea animals don't live in the sea. What can we do? 1. We can pick up trash on seashores. 2. We can pick up garbage from the sea. 3. We should not throw waste oil

asked by John on August 27, 2009
7. ## math

Dynacan Ltd. manufactured 10,000 units of product last year FC= 22,200,000,19,200,000,9,600,000,5,000,000 VC= 50,400,000,93,000,000,16,000,000,14,200,000 If unit variable costs and fixed costs remain unchanged, calculate the total cost to produce 9700

asked by alana on May 2, 2014
8. ## science

What is the wavelength of waves transmitted by an AM radio station operating at a frequency of 840 kilohertz? Calculate the energy of a photon whose frequency is 2450 megahertz What is the difference in energy for a photon of ultra-violet radiation,

asked by anna on December 5, 2012
9. ## Physics 1

The cartesian coordinates of a point in the xy plane are x= -3.64 m, y = -1.75 m. 1. Find the distance, r, from the point to the origin. Answer in units of m. 2. Calculate the angle between the radius-vector of the point and the positive x axis (measured

asked by Kailey on August 26, 2010
10. ## Physics

400 grams of a metal at 300 C is added to 100 grams of of water at 20 C. Assuming all the heat lost by the metal is gained by the water and that the final temperature or water and metal is 95 C, calculate the specific heat of the metal. Using grams and

asked by Sammie on October 20, 2015
11. ## science

1mole of liquid water at 25 c and 1 atm forms 1 mole of steam at 100 c and 1 atm. the molar heat capacity of water 373 k is 40.79kj/mol and the molar heat capacity of water is 75.3 J. assume ideal gas behavior for steam. Calculate delta U, delta H and

asked by bob on March 29, 2013
12. ## accounting

Assuming in your business, the cost per other for your product is 4000 naira and it carry cost is 400 per unit per annum your business has a demand for 20000 unit per year,1)Calculate the order size 2)total order required during a year 3)total carried cost

asked by kunfayakun on January 15, 2018
13. ## Chemistry- Reacting Masses Calculations

Hi the question asks me to calculate the mass of calcium carbonate that must be decomposed to produce 14kg of calcium oxide. I think I've gone wrong somewhere, do you write 14000g or 14kg etc, could you help? I did: Moles CaO=(Mass CaO/Mr CaO) =1400/56 =25

asked by Oli on November 2, 2014
14. ## Chemistry - check answer

A 20.0 L reaction vessel contains 0.016 moles CO2, 1.05 moles of CO, and 2.00 moles of C. The mixture is approaching the following equilibrium: CO2(g) + C(s) 2CO(g) a) Calculate the reaction quotient Q. b) If value of K is 1.17, predict which direction the

asked by Amanda on April 20, 2014
15. ## Mathematics

Mathematics: A chord of radius 12cm subtends an angle of 150 degree at the centre of the circle. Calculate. A. Perimeter of the circle (Ps) B. Area of the circle. (Account) C. Length of the circle (Lc) D. Length of the arc (Last) E. Perimeter of sector

asked by Olagunju on June 18, 2016
16. ## Physics

Light is bent as it enters a tank of water from air. It is bent to a greater angle when it goes from air to a glass block. Calculate the angle of refraction of 30.0° light shines from water into ice. The indices of refraction for water and ice are 1.36

asked by Tina on March 24, 2016
17. ## Precalc

A restaurant uses a cable for the servers to slide orders down to the kitchen. The end where the servers place the order is 5 feet high. The end where the kitchen receives the order is 1 foot high. The angle of elevation from the kitchen to the servers

asked by ceci on April 4, 2012
18. ## chemistry

A chemical is placed in a beaker containing 20 g of soil and 500 mL of water. At equilibrium, the chemical is found in the soil at a concentration of 100 mg/kg of soil. The equilibrium concentration of this same chemical in the water is 250 µg/L.

asked by Jazmin on January 21, 2011
19. ## physics

write down in terms of the mass m and the velocity v of the body, expressions for i) momentum ii) the kinetic energy use your answer to (b) to help calculate the mass and the velocity of the ball momentum is mass*velocity Kinetic energy is 1/2

asked by Kim on October 16, 2006
20. ## Chem

RXN #1: H2 (g) + O2 (g) --> H2O2 (l) ; delta-H =? Calculate the enthalpy change (delta-H1) for the reaction above (RXN #1) using the information below and Hess' Law. RXN A: H2O2 (l) --> H2O (l) + 1/2 O2 (g); delta-H=-98.0 kJ/mol RXN B: 2 H2 (g) + O2 --> 2

asked by Ally on July 12, 2011
21. ## physics

When you lift a bowling ball with a force of 60.7 N, the ball accelerates upward with an acceleration a. If you lift with a force of 69.3 N, the ball's acceleration is 1.99a. Calculate the weight of the bowling ball.

22. ## Chemistry

Calculate the translational partition function for Ar confined to a volume of 1000 cm^3 at 298 K. At what temperature will the translational partition function of Ne be identical to that of Ar at 298 K confined to the same volume?

asked by Clay on April 25, 2012
23. ## Chemistry (Check)

Calculate the DHrxn of C6H12O6 (s) + O2 (g) --> CO2 (g) + H2O (l) with DHf. C6H12O6(s) -1260.04 O2(g) 0 CO2(g) -393.5 H2O(l) -285.840 I balanced the equation and my work: DHrxn = [14mol(-393.5+(-285.840))] - [7mol(-1260.04+0)] = -690.48 KJ/mol Is this

asked by Anonymous on November 16, 2015
24. ## Chemistry (Check)

Calculate the DHrxn of C57H110O6 (s) + O2(g) --> CO2(g) + H2O(l) with DHf. C57H110O6(s) -390.70 O2(g) 0 CO2(g) -393.5 H2O(l) -285.840 I balanced the equation and my work: DHrxn = [224mol(-393.5+(-285.840))] - [165mol(-390.70+0)] = -87706.66 KJ/mol Is this

asked by Anonymous on November 16, 2015
25. ## Chemistry

What is the normal boiling point in ∘ C ^\circ {\rm C} of a solution prepared by dissolving 1.50 g {\rm g} of aspirin (acetylsalicylic acid, C 9 H 8 O 4 {\rm C}_{9}{\rm H}_{8}{\rm O}_{4}) in 75.00 g {\rm g} of chloroform (CHCl 3 ) ({\rm CHCl}_{3})? The

asked by Ren on February 4, 2014
26. ## physics

A simple pendulum is made from a bob of mass 0.04 kg suspended on alight string of length 1.4m. Keeping the string taut, the pendulum is pulled to one side until it has gained a height of 0.1m. calculate: a. The total energy of the oscillation (b) the

asked by Nuwaya on January 16, 2012
27. ## Chemistry

The equation for the reaction that occurs when lead(II) oxide is heated with coke in a blast furnace is: 2PbO+c -->2Pb+CO2 (i)State, with a reason, whether PbO is oxidised or reduced in this reaction. (ii)Calculate the minimum mass, in tonnes, of coke

asked by Qindan on April 22, 2013
28. ## physics

A 3m long, 290N uniform rod is held in a horizontal position by two ropes at its ends. The left rope makes an angle of 150 degrees with the rod, and the right rope makes an angle theta with the horizontal. An 86 N howler monkey hangs motionless 0.5 m from

asked by tyger2020 on November 13, 2018
29. ## Physics/Math

The top of the pool table is 3.05 ft from the floor. The placement of the tape is such that 0 feet aligns to the edge of the table (as shown). The winner of the competition wants to know if he has broken the world record for the break shot of 32 mph. His

asked by Peter on November 9, 2017

Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 236 miles and a perigee of 215 miles above the surface of Earth. Use the rule of thumb that

asked by Vanessa on December 16, 2010
31. ## Physics

Three blocks of masses 1.0, 2.0, and 4.0 kilograms are connected by massless strings, one of which passes over a frictionless pulley of negligible mass, as shown above. Calculate each of the following. a. The acceleration of the 4 kilogram block b. The

asked by Kate on February 28, 2010
32. ## physics

A flywheel with an axle 1.0cm in diameter is mounted in frictionless bearings and set in motion by applying a steady tension of 2N to a thin thread wound tightly round the axle. The moment of inertia of the system about its axis of rotation is 5.0 x 10^-4

asked by Edwin on March 26, 2010
33. ## Social

Crimes are committed because... -mental issues -for protection -financial difficulties -revenge -attention seeking as for this people receive punishments for each of these reasons for committing crimes write down a solution this is what i got for: -mental

asked by Anonymous on January 20, 2014
34. ## Social

Crimes are committed because... -mental issues -for protection -financial difficulties -revenge -attention seeking as for this people receive punishments for each of these reasons for committing crimes write down a solution this is what i got for: -mental

asked by Anonymous on January 21, 2014
35. ## Social

Crimes are committed because... -mental issues -for protection -financial difficulties -revenge -attention seeking as for this people receive punishments for each of these reasons for committing crimes write down a solution this is what i got for: -mental

asked by Anonymous on January 20, 2014
36. ## physics

A 2 kg rock is released from rest at a height of 29 m. Ignore air resistance and determine the kinetic energy, gravitational potential energy, and total mechanical energy at each of the following heights;20m 15m 9m * physics - bobpursley, Wednesday,

asked by Jay on November 17, 2010
37. ## Physics

For the case of freefall, explain how to calculate the total distance traveled and the instantaneous velocity for an object that is dropped from rest by applying the fundamental meaning of acceleration and by using the two equations: Vav+(vf+vi)/2 and

asked by Lily on October 8, 2012

can someone please answer these 2 questions please..with the work and answer,ive been stuck on for a while and just wanna sleep but thanks. Find the unit price for each option shown below. Round to the nearest cent when necessary. Indicate which option is

asked by Anonymous on February 11, 2014
39. ## Chem.

Sorry if I confused you. I miss-wrote my question. My question was: How can I determine the concentration of HCl remaining in the flask. I calculated the # of moles of HCl neutralized by the tablet which was around 0.014 M. I don't understand the steps

asked by Help!! on July 7, 2015
40. ## Algebra

almost done with Algebra...help! 2 3x – 6(2x – 0.055) = 10x + 0.515 I don't know what want but assuming your solving for x... 23x-12x-.33= 10x + 0.515 11x-.33= 10x + 0.515 x= 0.845 You need to clarify your post. Is that 23x or 3x (for problem #2

asked by Mathew on August 16, 2007
41. ## Algebra II

The question simply states-solve. -x^4+200=102x^2 I rearranged the equation so that I have x^-102x^2+200=0 Since I cannot factor this my solution is x= -51 =/-2 square root of 2801 divided by 2. Is this correct. Also a second problem that I do not know how

asked by Lucy on February 23, 2008

Have 2 identical cars each 1000kg at a speed of 20m/s. The yellow car is stopped by car's brakes in 25m while green car is stopped by concrete barrier in 1.2m. Drivers have same mass(70kg) Driver of yellow car is stopped by seatbelt in 0.150 sec. Compare

asked by Annie on December 7, 2010
43. ## Chemistry

A sample of oxygen gas is collected by displacing water from an inverted bottle as shown in the diagram below. The volume of O2(g) collected is 400.0ml at 25 degree Celsius. The atmospheric pressure is 680 torr and the vapor pressure of water at 25 degree

asked by K on February 3, 2011
44. ## physics

A reciprocating compressor is a device that compresses air by a back-and-forth straight-line motion, like a piston in a cylinder. Consider a reciprocating compressor running at 150 rpm. During a compression stroke, 1.30 mol of air is compressed. The

asked by Joseph on May 30, 2011
45. ## chemistry

The Clapeyron-Clausisus Equation is ln(P2/P1) = dHvap/R [(1/T1)-(1/T2)]. Assuming that dHvap doesn't change with the temperature, this equation relates the change in vapor pressure and temperature to a substances enthalpy of vaporization (R is the molar

asked by isabelle on February 18, 2012
46. ## Mathematics

Q1.A man earn $1200 and spends$450 per month.Find ratio of (a)His income to his expenditure and (b)His savings to his income Q2.An open water tank with length 20 cm and width 15 cm holds 4.8 liters of water.calculate the height of the water level tank and

asked by Envy Green on May 14, 2011
47. ## chem

The problem is :2.8 grams of ethene burns in oxygen to form carbon dioxide and water Calculate a)the number of moles in 2.8g of ethene b)the number of carbon dioxide(mole ratio) dioxide formed c)the mass of carbon dioxide formed D)the volume of carbon

asked by Anonymous on June 6, 2016
48. ## physics

A snapshot graph of a travelling wave is shown. The wave is travelling to the right at 32.0 m/s. a) What is the amplitude if the maximum displacement is 28.0 cm and the total distance travelled by the wave is 26.0 m? b)What is the wavelength of the wave?

asked by Anonymous on November 21, 2008
49. ## Math

A stadium has two sections Tickets for section A cost $a each Tickets for Section B cost$b each Johanna paid $105 for 5 section A tickets and 3 section B tickets. Raiyah Paid$63 for 4 section A tickets and 1 section B ticket Write 2 equations in a and b

asked by Jayda on June 27, 2009
50. ## math plz help

man on 12m tower, he observed two houses. the angle of depression to one of them was 6' and the other is 3'. how far apart the houses are. Calculate the distance between the house if: a)the houses are on the same side of the tower b)the houses are on

asked by Emmauel on December 14, 2014
51. ## Any Math Tutor Online? Help

man on 12m tower, he observed two houses. the angle of depression to one of them was 6' and the other is 3'. how far apart the houses are. Calculate the distance between the house if: a)the houses are on the same side of the tower b)the houses are on

asked by Emmanuel on December 14, 2014
52. ## trigometry

man on 12m tower, he observed two houses. the angle of depression to one of them was 6' and the other is 3'. how far apart the houses are. Calculate the distance between the house if: a)the houses are on the same side of the tower b)the houses are on

asked by Emmauel on December 14, 2014

Calculate the percentage return on the security if the payoff to the security in one year is $1,000, ... security in one year is$1,000, $1,500,$2,000, or $2,500. asked by cheryl on April 14, 2013 54. ## math Rectangles ABCD and PQRS have the same length-to-width ratio. Calculate the length of rectangle PQRS rectangle abcd: L: 30 cm W: 18 cm rectangle pqrs: L: ? W: 27 cm asked by Anne on October 18, 2016 55. ## biology Given that the caloric expenditure is about 10 kcal/ 1 lb. * day. How would you find the ATP expenditure/day. Is it possible to calculate the amout of ATP used per day given only the caloric expenditure? asked by jared on April 2, 2009 56. ## Physics A cubic box of volume 4.2 multiplied by 10-2 m3 is filled with air at atmospheric pressure at 20°C. The box is closed and heated to 195°C. What is the net force on each side of the box? My attempted solution: .042^(1/3) = .3476 m for the area .042^(2/3) asked by Anonymous on January 26, 2012 57. ## engineering A thermometer is used to measure the temperature of a gas flow through a pipe. The gas temperature is read at 500°C and the duct temperature is measured to be 350°C. The thermometer is cylindrical with a diameter of 1 mm and an intrusion length of 1 cm. asked by jim on August 14, 2013 58. ## math f(x) = 4e^-1x +13x +5 at (0,9) 1. All steps for finding the first derivative of the function are clearly and accurately shown. 2. All steps for evaluating the derivative to find the slope of the tangent to the curve at the given point are clearly and asked by sarah on April 12, 2010 59. ## Chemistry A 0.179 g sample of a vitamin C tablet was titrated with 0.1000 M NaOH according to the procedure in this experiment. The titration required 7.08 mL of NaOH solution. How many moles of NaOH were used in the titration? How Many moles of Vitamin C were in asked by Anonymous on October 14, 2015 60. ## Chemistry Oxygen gas may be prepared by decomposing hydrogen peroxide, h2o2, using manganese (IV) oxide catalyst: 2H2O2(liquid) ----> 2H2O(liquid) + O2(gas) Calculate the amount of oxygen that will be produced from 1.35 moles of H2O2 Determine the mass of oxygen gas asked by kai on December 5, 2014 61. ## chemistry The element rhenium (Re) has two naturally occurring isotopes, 185Re and 187Re, with an average atomic mass of 186.207 amu. Rhenium is 62.60% 187Re, and the atomic mass of 187Re is 186.956 amu. Calculate the mass of 185Re. (Give your answer to 3 decimal asked by Lisa on October 18, 2009 62. ## physics Sprinting near the end of a race, a runner with a mass of 70 kg accelerates from a speed of 6 m/s to a speed of 9 m/s in 2 s. (a) What is the runner's average acceleration during this time? (b) To gain speed the runner produces a backward force on the asked by confused on November 22, 2010 63. ## carpentry, math 2. A 4 × 12 built-up girder is 30″. How many board feet does this girder contain? (Round your answer to the nearest whole number.) A. 107 B. 312 C. 128 D. 96 I think the answer is C.128. -- 3. Calculate the number of hours needed to frame a one-story asked by doug on November 19, 2018 64. ## algebra word problem A kicker punts a football from 3 feet above the ground with an initial velocity of 47 feet per second.1) write an equation that gives the height (in feet) of the football as a function of the time (in seconds) since it was punted. 2) Find the height (in asked by Anneliese on January 6, 2017 65. ## Physics 203 A block with mass of 5.0kg is suspended from an ideal spring having negligible mass and stretches the spring 0.20m to its equilibrium position. A) What is the force constant of the spring? B) The spring is then stretched 0.80m from its equilibrium position asked by ash on April 9, 2013 66. ## accounting A company purchased a machine on January 1 of the current year for$750,000. Calculate the annual depreciation expense for each year of the machine's life (estimated at 5 years or 20,000 hours, with a salvage value of $75,000). During the machine's 5-year asked by Dan on August 25, 2012 67. ## science Oxygen gas may be prepared by decomposing hydrogen peroxide, h2o2, using manganese (IV) oxide catalyst: 2H2O2(liquid) ----> 2H2O(liquid) + O2(gas) Calculate the amount of oxygen that will be produced from 1.35 moles of H2O2 Determine the mass of oxygen gas asked by Nat on December 8, 2014 68. ## math/algebra A kicker punts a football from 3 feet above the ground with an initial velocity of 47 feet per second. Write an equation that gives the height (in feet) of the football as a function of the time (in seconds) since it was punted. Find the height (in feet) asked by Anon on December 9, 2012 69. ## calculus A hole of a radius of 1cm is pierced in a sphere of a 4cm radius. Calculate the volume of the remaining sphere. I know that the volume of a sphere with an exterior radius is of: V = pie(R^2 - r^2) dH where R^2 is the exterior surface area and r^2 is the asked by John on September 15, 2012 70. ## Physics A block with mass of 5.0kg is suspended from an ideal spring having negligible mass and stretches the spring 0.20m to its equilibrium position. A) What is the force constant of the spring? B) The spring is then stretched 0.80m from its equilibrium position asked by Tammy on April 18, 2019 71. ## math A kicker punts a football from 3 feet above the ground with an initial velocity of 47 feet per second. Write an equation that gives the height (in feet) of the football as a function of the time (in seconds) since it was punted. Find the height (in feet) asked by timothy on December 9, 2012 72. ## business Suppose the price of apples rises from$3.50 a pound to \$4.00 and your consumption of apples drops from 30 pounds of apples a month to 20 pounds of apples. Calculate your price elasticity of demand of apples. What can you say about your price elasticity of

asked by jward1970 on February 24, 2010
73. ## modern physics

The earth and the sun are 8.3 light-minutes apart in the same inertial frame. Two events occur at t = 0 on the earth and t = 3 minutes on the sun respectively. Calculate the time difference between the events according to an observer moving at u = 0.6c

asked by gourav on March 19, 2017
74. ## modern physics

The earth and the sun are 8.3 light-minutes apart in the same inertial frame. Two events occur at t = 0 on the earth and t = 3 minutes on the sun respectively. Calculate the time difference between the events according to an observer moving at u = 0.6c

asked by gourav on March 21, 2017
75. ## chemistry

in trial one the mass of silver oxide is .5g. The mass of silver metal product is .431 grams. In trial two the silver oxide=.498 and silver metal=.388. Use the conservation of mass to calculate the mass of oxygen that combined with the silver

asked by kelly on September 19, 2010
76. ## Algebra help/ look over please

Can you please look over these and let me know if they are right? 1/4(5x-1/2)-5/3

asked by Lisa on October 1, 2009
77. ## physical sciences

john wants to get his friend, peter, to a height of 2.8 m above the ground to reach an apple in a tree. they connect a swing to a high branch in an adjacent tree. the bottom of the swing, X, is at a height of 1.2 m. peter has s mass of 45 kg. ignore the

asked by xolani rudolph ngovene on March 1, 2016
78. ## Physics

The sun radiates like a perfect blackbody with an emissivity of exactly 1. (a) Calculate the surface temperature(K) of the sun, given it is a sphere with a 7.00 multiplied by 108 m radius that radiates 3.80 multiplied by 1026 W into 3 K space. (b) How much

asked by Alice on July 20, 2013
79. ## statistics

The proportion of baby boys born in the United States has historically been 0.512. You choose an SRS of 55 newborn babies and find that 47% are boys. Do ALL calculations to 5 decimal places before rounding. (d) In a random sample of 55 newborn babies, what

asked by Ashley on June 30, 2011
80. ## economics

Given the following exports of merchandise 107 exports of services 34 net unilateral transfers 7 statistical discrepancy 0 official settlements balance 22 imports of services 22 capital inflow 6 imports of merchandise 119 capital outflow 29 Calculate the

asked by ULi on March 20, 2008
81. ## physics

The sun radiates like a perfect blackbody with an emissivity of exactly 1. (a) Calculate the surface temperature(K) of the sun, given it is a sphere with a 7.00 multiplied by 108 m radius that radiates 3.80 multiplied by 1026 W into 3 K space. (b) How much

asked by Alice on July 21, 2013
82. ## Physics

The pressure-volume graph shows an engine cycle where the working substance is an ideal monatomic gas (γ = 5/3). The process A-B is adiabatic. At point A, the pressure is 2.70×105 Pa and the volume is 0.0180 m3. At point B, the volume is 0.0450 m3.

asked by Jamie on June 25, 2012
83. ## physics

A capacitor A1B1 of capacitance C1=2microF is charged under a voltage U1=20V and then isolated. a) Calculate the voltage U (A1B1) between its plates, and it's charge Q1 and energy W1. b) The plates A1 and B1 are connected to those A2 and B2 of an uncharged

asked by angy on April 19, 2016
84. ## physics

A child slides down a slide with a 28° incline, and at the bottom her speed is precisely three-fifths what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child Height=

asked by Anonymous on December 14, 2006
85. ## Env.Microbiology

write down the '' balance sheet''(carbon,electron,ATP,etc)for the fallowing metabolic process: -use the most common alternatives. -Give the balanced overall reactions with correct stoichiometry -İndicate all key reactans and products. -calculate how many

86. ## Math

The question is: A gardener wishes to create a rectangular bed. There are 70 meters of fencing wire which will be used to fence three sides of the garden bed, with a brick wall forming the fourth side. Calculate the maximum area of the garden bed that can

asked by Side length of a question help on June 16, 2015
87. ## Environmental Science

write down the '' balance sheet''(carbon,electron,ATP,etc)for the fallowing metabolic process: -use the most common alternatives. -Give the balanced overall reactions with correct stoichiometry -Ýndicate all key reactans and products. -calculate how many

asked by Djef on April 6, 2011
88. ## Physics

Two blocks of masses M and 5M are placed on a horizontal, frictionless surface. A light spring is attached to one of them, and the blocks are pushed together with the spring between them, as seen in the figure below:

asked by Brian on June 12, 2010
89. ## chemistry

Calculate the atomic weight (in amu) of an element (X) given the following data: : 24.000 amu at 0.7870 fractional abundance : 26.000 amu at 0.1017 fractional abundance : 25.000 amu at 0.1113 fractional abundance

90. ## mathematics

THE 1ST, 3RD AND 9TH TERM OF A LINEAR SEQUENCE A.P ARE THE 1ST THREE TIMES OF G.P. IF THE 7TH TERM OF THE LINEAR SEQUENCE IS 14. CALCULATE (A) 20TH TERM OF THE LINEAR SEQUENCE (B) SUM OF THE 1ST, 12TH TERM OF THE G.P

asked by AYOMIDEY on March 5, 2015
91. ## chemistry

100g of stea initial at 100 degree celcius is passed through a calorimeter containing 1kg of water at 20 degree celcius. Assuming no heat loose and negligible heat capacity of the calorimeter, calculate the final temperature of the calorimeter and the

asked by minenhle on August 31, 2015

A bicycle wheel has a radius of 0.330 m and a rim whose mass is 1.20 kg. The wheel has 50 spokes, each with a mass of 0.010 kg. a.) Calculate the moment of inertia of the rim about the axle. b.) Determine the moment of inertia of any one spoke, assuming it

asked by Janelle on March 10, 2010
93. ## physics

A freshman smart alek lips off onces too often! The assistant principle loses her cool and grabs the 38.0kg punk by the hair- swinging him in a vertical circle of radius 1.20m! if the freshman is moving at 6.30m/s at the bottom of the swing, calculate: A)

asked by greoge on March 30, 2015
94. ## physics

Eris, the largest dwarf planet known in the Solar System, has a radius R = 1200 km and an acceleration due to gravity on its surface of magnitude g = 0.77 m/s2. (a) Use these numbers to calculate the escape speed from the surface of Eris. 1360 m/s correct

asked by mymi on October 30, 2011
95. ## PHYSICS NEED HELP ASAP

A freshman smart alek lips off onces too often! The assistant principle loses her cool and grabs the 38.0kg punk by the hair- swinging him in a vertical circle of radius 1.20m! if the freshman is moving at 6.30m/s at the bottom of the swing, calculate: A)

asked by greoge on March 30, 2015
96. ## Chemistry

Experiment 1: A has .20 M, B has .20 M and the initial rate is 2.0*10^-4M/min Experiment 2: A has .20 M, B has .40 M, and the initial rate is 8.0*10^-4M/min Experiment 3: A has .40 M, B has .40 M, and the initial rate is 1.6*10^-3M/min Using the data

asked by Finn on August 20, 2015
97. ## algebra

An electrician working on a project spent one-third of his time wiring the main service. If the electrician spent 4hours wiring the main service,how much time did he spend on the project? Write an equation to solve the problem. Use algebra to solve the

asked by Cherie on April 26, 2012
98. ## math

Jeremy enlarged a picture.The length of the original picture is 8cm and the width is 5cm.The length of the enlarged picture is 10cm and the width is 7cm. A.What percent is the 10cm length of 8cm length? B.What is the area of each picture?By what percet is

asked by Anonymous on September 28, 2015
99. ## Physics

If a large housefly 3 m away from you makes a noise of 43 dB, what is the noise level of 1200 flies at that distance, assuming interference has a negligible effect? Noise level of 1200 flies = ??dB HELP: Using the formula for decibels and the given