# 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 256-
## ipc

Two metal balls have their centers 2.0 meters apart. One has a mass of 6.0 kg and the other has a mass of 8.0 kg. Choose the operation that will calculate the gravitational force between them.

*asked by kassandra casias on February 26, 2010* -
## Math, Physics

Calculate Earth's gravitational force on the ISS astronauts while orbiting at an altitude of 401.5 km above Earth’s surface.

*asked by Hooman on January 9, 2017* -
## chemestry

Calculate the number of moles of NH3 that can be formed from the complete reaction of 0.30 moles of N2 according to the equation N2 + 3H2 → 2NH3

*asked by michelle on March 24, 2016* -
## chemestry

Calculate the number of moles of NH3 that can be formed from the complete reaction of 0.30 moles of N2 according to the equation N2 + 3H2 → 2NH3

*asked by Anonymous on March 24, 2016* -
## phy111

An upward force of 1 2 104N acts on an elevator of mass 2 0 103kg. Calculate the acceleration of the elevator. Take g=9 8ms−2

*asked by hart on October 25, 2014* -
## statistics

help me work out the problem to calculate the difference means distribution parameters n(1)=25, n(2)=36 s(1)square=50, s(2) square=72, M(1)=100,M(2)=105

*asked by Cherelle on January 18, 2013* -
## physics

A body strikes the ground vertically down wards with a velocity u and rebounds with the same speed.Calculate the change in velocity.

*asked by Anonymous on June 10, 2012* -
## Physical science

how can i calculate the number of: 1.molecules in 30g water.2.atoms in 50 dm^3 nitrogen gas.3.nucleons in 10 cm^3 flourine gas?

*asked by sandy on May 7, 2011* -
## Chemistry

Carbon disulfide (CS2) is useful, but flammable, solvent. Calculate DH for the following reaction. CS2(l) + 3O2(g) --> CO2(g) + 2SO2(g)

*asked by Anonymous on November 13, 2015* -
## math

A bicycle wheel has a diameter of 63cm.calculate how many times the wheel turns round in travelling 19.8km. Use the value 3 1/7 for pi

*asked by charity on April 18, 2014* -
## math

a picture which measures 48cm by 40cm is surrounded by a frame which is 1cm wide.calculate the area of the frame

*asked by BRATTE on January 14, 2017* -
## physics

define 1watt of power . a lamp consumes 1000J of electrical energy in 10s calculate its power.

*asked by prudhvi on January 16, 2013* -
## physics

A ball of mass 0.50 kg is thrown vertically upwards, calculate the net force on the ball at the top of its flight

*asked by Duy on March 20, 2016* -
## Algebra

calculate the time for the colony to reach 1 million bacteria. Number of bacteria present. Doubles every minute 2 4 8 16 32 64

*asked by Suzanne on March 20, 2016* -
## physics

Venus has radius 6.05 x 10^6 m and mass 4.87 x 10^24 kg. Calculate the value of acceleration due to gravity on Venus's surface. I don't understand

*asked by Jon on April 2, 2008* -
## Chemistry

Molecular bromine is 24 percent dissociated at 1600 K and 1.00 bar in the equilibrium Br2 (g) = 2Br (g). Calculate Kp at 1600 K.

*asked by John on February 6, 2011* -
## P-Chem

I am a bit confused on working this problem: Given that the work function (ƒÖ) for a metal is 1.82 eV, calculate the threshold frequency for this metal.

*asked by suzane on September 15, 2011* -
## Chemistry

Calculate the partial pressure of helium in a 1.00 L flask that contains equal numbers of moles He, Ne, and Ar at a total pressure of 5.26atm

*asked by Randy on April 10, 2012* -
## chemistry

Calculate the Calorimeter Constant if 25 g of water at 58C was added to 25 g of water at 25C with a resulting temperature of 35C?

*asked by bipasha on March 31, 2008* -
## Math

A force act on a body for 0•5sec and changes its momentum from 16kg. Calculate the 1-magnitude of the force 2-impulse on the ball

*asked by Lubnah on January 16, 2017* -
## Chemistry

Calculate the increase of entropy (in J/K) when 75 g of ice melts at 0 ºC and 1 atm. (The heat of fusion for ice is 6,000 J/mol.)

*asked by Emily Couroso on March 31, 2015* -
## Chemistry

Calculate the heat energy released when 19.6 of liquid mercury at 25.00 C is converted to solid mercury at its melting point

*asked by Josh on July 9, 2011* -
## physics repost

A 1600 kg vehicle moves with a velocity of 19.5 m/s. Calculate the power required to reduce the velocity to 3.20 m/s in 11.0 s. I don't know this one the only thing I know is p=w/t

*asked by Jon on April 4, 2008* -
## chemistry

The volume of an ideal gas is 2.06L at standard temperature and pressure. Calculate the volume at 1.75atm and 27oC

*asked by Lo on December 6, 2010* -
## chemistry

Calculate the standard cell potential for the glavanic cell in which the follwoing reactino occurs: 2I^-(aq) + Br2(l) ---> I2(s) + 2Br^-(aq)

*asked by Priya on April 22, 2008* -
## Area and Perimeter Shepes

a rectangle has a perimeter of 32cm. one side measures 5cm. calculate the area of the rectangle.show your working.

*asked by Willow on November 10, 2015* -
## Chemistry

The distance between Miami and Key Largo is 70 miles. If a mile is 5280 ft and an inch is 2.54 cm, Calculate this distance in Kilometers

*asked by Zee on January 20, 2013* -
## math

If the wheel of a bicycle has a diameter of 60cm, calculate how far a cyclist will have travelled after the wheel has rotated 100 times.

*asked by Samuel on January 15, 2015* -
## Physics

A 225-kg crate is pushed horizontally with a force of 710 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.

*asked by Nathan on April 14, 2010* -
## chemistry

calculate the pH of a buffer made by combining 50.0mL of 1.00M ammonia and 50.0mL of ammonium nitrate Kb=1.77x10^-5

*asked by Mandie on November 12, 2011* -
## mathematics

The first and the last term of ap is 21 and-47 , if the sum of series is 234 calculate ,number of term ,common difference, thesum of first 18 terms

*asked by ojo on October 23, 2018* -
## mathematics

The first and the last term of ap is 21 and-47 ,if the sum of series is 234 calculate ,number of term ,common difference, thesum of first 18 terms

*asked by ojo on October 23, 2018* -
## Math

A cone is 14cm deep and the base radius is 4.5cm. Calculate the volume of the water that will fill the cone

*asked by Kayode on March 30, 2016* -
## science

a body travel a distance of 15m from a to b and them movrs 20 m at right angles to ab. calculate the total distance covered and displacement. (

*asked by gunjan on June 26, 2014* -
## math

The angle of elevation of the top of a building from a point 10m away in level ground is 30.calculate the height of the building

*asked by Anonymous on January 5, 2017* -
## Math

the speed of a point A due to the rotation of the earth is twice that point of B.if A is on latitud 22 degree to the north calculate the latitude of B

*asked by flexy on October 24, 2012* -
## Chemistry

Calculate the energy in joules and calories required to heat 40.0 silver from 112 degrees to 280 degrees

*asked by Joan on June 14, 2010* -
## Chemistry

Calculate the change in heat when 11.5 g of water vapor (steam) at 100.0°C condenses to liquid water and then cools to 5.00 °C

*asked by Lisa on November 2, 2017* -
## Physics

Two charges -1 microcoulumb and 2 microcoulumb are placed at the corner A and B of an equilateral triangle ABC of side 2m. Calculate the electric field at C

*asked by Rajan on October 27, 2018* -
## Math

A kitchen floor measures 10ft by 12 ft. Calculate the minimum area and maximum area using the greatest possible error

*asked by Shelby on October 27, 2014* -
## chemistry

Calculate the standard cell potentiqal for the galvanic cell in which the following reaction occurs: 2Na(s) + 2H20(l) --> H2(g) + 2NaOH(aq)

*asked by Priya on April 22, 2008* -
## chemistry

A given mass of gas has a volume of 7.5dm at 250k and 80kmm3,calculate the pressure at which it will have a volume of 7.2dm3 at 270k?

*asked by Blessing on January 28, 2016* -
## Finance

Present value, How do I calculate the present value of: 7,000.00 in 5 years at a quarterly discount rate of 6%? I have read over the material, but I don't get it. Thank you

*asked by Nancy on April 22, 2011* -
## Chemistry

Calculate ΔG∘ at 298 K for the following reactions. A) Ca(s)+CO2(g)+12O2(g)→CaCO3(s) B) 2KClO3(s)→2KCl(s)+3O2(g) C) CO(g)+H2O(g)→H2(g)+CO2(g)

*asked by Tl on May 12, 2014* -
## Chemistry

Calculate the percent yield for the reaction if 76.8 g of H2O reacted and 125 g of NO were produced. NO2+H2O->HNO3+NO

*asked by Sara on July 20, 2013* -
## Chemistry

A 249-gram sample of water is heated from 2° C to 85° C. Calculate the amount of heat absorbed (in kJ) by the water. Please explain.

*asked by John on June 15, 2010* -
## math

A chord of a circle 38.8 cm long is subtended by a 150 degree central angle.Calculate the radius of the circle.

*asked by penelope on January 29, 2013* -
## chemistry

Calculate the density of atoms in (001) in lithium (Li). Express your answer in units of atoms/cm2. incorrect

*asked by adex on April 27, 2013* -
## Physics

A bus accelerates uniformly from 8 M/s to 24 m/s in 4 seconds. What is the acceleration produced? Also calculate the distance covered by the bus during the given time?

*asked by Vitthal on August 4, 2016* -
## Physics

A car of mass m = 1450 kg is traveling at a speed of v0 = 79 km/h (21.9 m/s). Calculate the work that must be done by the brakes to completely stop the car in kJ

*asked by Nate on May 27, 2012* -
## Chemistry

2H2 (g) + O2 (g) 2H2O (g) what is the likely magnitude of the equilibrium constant? a) k < 10 ^-3 b) 10^-3

*asked by Katie on March 11, 2010* -
## math

a and b represent 2 walls. wall a costs $180.00 to paint.at the same rate calculate the cost of painting wall b?

*asked by kimberly on January 30, 2011* -
## trigonometry

given triangle ABC with AB=7cm, BC=8cm and AC=9cm calculate 1. the size of the largest angle 2. the area of the triangle

*asked by lindsay on April 21, 2012* -
## Chemistry 3A

CS2 + O2 -> CO2 + SO2 and 10.0 grams of each reactant, calculate the number of moles of SO2 that can be produced in this reaction

*asked by Gurjot on December 10, 2012* -
## Chemistry

Calculate the new concentration of NaOH if 35 mL of 2.0M NaOH is added to 45 mL of water. If I don't use C1V1=C2V2, then how do I solve it? I'm confuused.

*asked by Nissa on December 6, 2016* -
## Chemistry

Calculate ΔG∘ at 298 K for the following reactions. Ca(s)+CO2(g)+12O2(g)→CaCO3(s) 2KClO3(s)→2KCl(s)+3O2(g) CO(g)+H2O(g)→H2(g)+CO2(g)

*asked by John on May 18, 2014* -
## Calculation in chemistry

8.0g of mettalicoxide were reduced by hydrogen to give a metal of 2.0g. Calculate the mole of d metal that will combined with 0.5moles of oxygen.

*asked by Nurudeen on May 23, 2014* -
## math

Calculate the interest earned on a savings account with $900.00 that is invested at 4% annual simple interest for 5 years?

*asked by !!PLEASE ANSWER!!! now plzzz on November 30, 2012* -
## Chemistry

When K is measured for a reaction, the values obtained are 3.1 at 25°C and 7.42 at 35°C. Using the equation lnK=-(∆H°/R)(1/T)+(∆S°/R) (in the form y=mx+b) calculate ∆H° and ∆S° for the reaction PbCl2(s) --> Pb2+(aq) + Cl-(aq)

*asked by sea lively on August 14, 2018* -
## chemistry

Calculate the partial pressure of 3.25 moles of oxygen that have been mixed (no reaction) with 1.25 moles of nitrogen in a 25.0 L container of 298 K.

*asked by alex on March 20, 2013* -
## Chemistry

When K is measured for a reaction, the values obtained are 3.1 at 25°C and 7.42 at 35°C. Using the equation lnK=-(∆H°/R)(1/T)+(∆S°/R) (in the form y=mx+b) calculate ∆H° and ∆S° for the reaction PbCl2(s) --> Pb2+(aq) + Cl-(aq)

*asked by sea lively on August 14, 2018* -
## Algebra

Sam needs to fill up a box with packaging material. Use the Figures below to calculate the volume of the box. Length=2x+3 width=x+2 ht=x-3

*asked by WillyB on March 12, 2014* -
## Calculus

Calculate the Riemann sum of the area under the curve of f(x)=9-x^2 between x=-2 and x=3 The answer I come up with is 10/3, but when I solve using integrals, the answer I get is 100/3. Am I doing something wrong?

*asked by Mike on December 3, 2017* -
## chemistry

Calculate the partial pressure of 24 g methane, 48 g of oxygen and 56 g of nitrogen contained in a 25L container. What is the total pressure.

*asked by josh on September 11, 2009* -
## physics

In order for me to fill the table of equilibrium, how do I calculate change(mol) Please give me in detail about filling the table

*asked by Lindokuhle on April 28, 2013* -
## Mathematics

karen exchanged BDS$ two thousand dollars and received EC$ two thousand seven hundred calculate the value of one BD$ in EC$ I would just like the formula so i can work it out please

*asked by INDIANA on June 26, 2012* -
## Chemistry

Calculate the amount of heat in kcal it would take to convert 1.45 mol of ice at 0 degrees C to steam at 100 degrees C.

*asked by Jess on November 1, 2011* -
## Math

The 13th termof an arithmetic sequence is 61 and the 20th term of the squence is 82. Calculate the sum of the first 25 terms of the sequence

*asked by Melissa on December 17, 2011* -
## Physics

A constant force of 35.9 N, directed at 28.7o from horizontal, pulls a mass of 14.7 kg horizontally a distance of 3.41 m. Calculate the work done by the force.

*asked by Kristen on October 20, 2013* -
## math

A triangular plot ABC is such that AB = 36m, BC = 40m and AC = 42 m a) Calculate the: i) Area of the plot in square meters √(s(s-a)(s-b)(s-c)) How to find S?

*asked by kudu on February 20, 2015* -
## Physics

A constant force of 35.9 N, directed at 28.7o from horizontal, pulls a mass of 14.7 kg horizontally a distance of 3.41 m. Calculate the work done by the force.

*asked by Kristen on October 20, 2013* -
## Chemistry

The compound A1B2 (molar mass = 132) has a solubility of 13 g/L. Calculate the Ksp for this compound. I'm stuck on this question, please help?

*asked by Adrianna on April 3, 2011* -
## chemistry

if 50.0 mLs of HCl of unknown concentration is titrated to neutrality with 90.0 mL of .650 M NaOH. calculate the molarity of the HCl

*asked by susan on November 14, 2011* -
## chemistry

How can values of heats of formation found in tables be used to calculate heats of reactions? I am having a really hard time understanding this.

*asked by laura on October 2, 2016* -
## Physics

a 254-kg crate is pushed horizontally with a force of 740 N. if the coefficient of friction is .20, calculate the acceleration of the crate

*asked by Annie on November 29, 2012* -
## Physical science

A brick falls off a scaffold at a height of 80meters above the ground. Calculate the magnitude of its velocity when it hits the ground.

*asked by Lholo on January 21, 2019* -
## chemistry

if 50.0 mLs of HCl of unknown concentration is titrated to neutrality with 90.0 mL of .650 M NaOH. calculate the molarity of the HCl

*asked by susan on November 14, 2011* -
## Physics

An isotropic point source has an intensity of 300Cd. Calculate the amount of luminous flux emitted by the source.

*asked by Evans on August 16, 2018* -
## physics

calculate the root mean square speed of nitrogen at 0 degree celcuis. Take the molecular weight of nitrogen M= 28*0.0010

*asked by magayaki on August 9, 2016* -
## chemistry

Calculate the mass of ethanol required to heat 200mL of water from 21 degrees celcius to 45 degress celcius

*asked by Kate on November 9, 2010* -
## MATH

Each year, Eric invests $2500 at 8.2%/a compounded annually for 25 years. a) Calculate the value of each of the first four investments at the end of 25 years.

*asked by Maame on May 26, 2012* -
## physics

calculate the distance it traveled before it is brought to rest from 44 km/h if the speed of a truck going south is reduced from 80 km/h to 44 km/h in a distance of 250 m.

*asked by Anonymous on December 16, 2011* -
## Linear Programming

calculate the lower bound from min z= 4x1 + 2x2 2x1 - 3x2 => 4 x1 + 5x2 0

*asked by Ashlee on October 30, 2006* -
## physics

calculate the shortest length of cable which can be used to support a load of 1000N if tension in the cable is not to exceed 710N? Take AC=BC

*asked by Ishank on October 16, 2011* -
## math

what rule relating time and distance can help me calculate the traveled for 950 miles in bus at 60 miles per hour?

*asked by monserrate on January 30, 2011* -
## physics

calculate the distance it traveled before it is brought to rest from 44 km/h if the speed of a truck going south is reduced from 80 km/h to 44 km/h in a distance of 250 m.

*asked by Annie on December 16, 2011* -
## math/compound

Calculate the interest earned on an investment of 2500 invested at an interest rate of 6.15%/a compounded quarterly for 10 years.

*asked by parker on January 3, 2015* -
## Stats

The probabilty Distribution of a random variable X is given by the function f(x)= 1/84 (5/x) (4/3-x) for x= 0,1,2,3 Calculate the numerical probabilities and list the distribution. I got 10/21 for the x value of 2. The others I am unsure about! Help please

*asked by Karmen on February 9, 2010* -
## math

A goat is tied to a peg in the ground. the rope is 4.5m long. calculate the area of grass that the goat can eat.

*asked by daniel paul on April 30, 2019* -
## Chemistry

When K is measured for a reaction, the values obtained are 3.1 at 25°C and 7.42 at 35°C. Using the equation lnK=-(∆H°/R)(1/T)+(∆S°/R) (in the form y=mx+b) calculate ∆H° and ∆S° for the reaction PbCl2(s) --> Pb2+(aq) + Cl-(aq)

*asked by sea lively on August 13, 2018* -
## Integrated Math 1

Calculate the product of the binomials below. Use the caret ( ^ ) to enter any exponents; for example, write x2 as x^2. Write your answer in descending order. (4x - 3)(x + 1)

*asked by Tifini on July 15, 2012* -
## Math

Calculate the CPI for this year and for 5 years from now. Project the price 5 years from now of an item that you commonly buy like gas?

*asked by Lisa on November 26, 2017* -
## Chemistry

Calculate ΔG at 298K if MnO2 = 0.150 mol, Mn = 0.850 mol, CO = 0.250 M and CO2 = 0.500 M in a 1.25 L flask.

*asked by Kate on April 8, 2015* -
## Chemistry

Please help me....are these questions right or no? If not can you help me...any suggestions please? 7.(14). Which of the following is a salt? a. HNO3 b. H2SO4 c. CaSO4 d. NaOH e. NH3 I put down C- CaSO4, is that right or am I way off track? 8.(15). Which

*asked by Taylor on October 6, 2009* -
## Math

If a dice is 4mm per side then how do i calculate the surface area of the dice?

*asked by Carol on August 19, 2018* -
## geometry

In triangle ABC, AB=5 cm, BC=12 cm and angle ABC=90 degree, calculate the length of AC.

*asked by Bhuvanesh. D on September 28, 2014* -
## Chemistry

The Ksp of CaSO4 is 4.93× 10–5. Calculate the solubility (in g/L) of CaSO4(s) in 0.300 M Na2SO4(aq) at 25 °C

*asked by Katherine on November 12, 2013* -
## Physics- formula help

How do you calculate air resistance on an object if you have how much the object weighs and the acceleration?

*asked by Mimi on December 1, 2014* -
## Maths

Y varies partly as X and partly as the square root of inverse of X. If Y=11 where X=9 and Y=20 where X=9 calculate Y when X=12.

*asked by Doris on April 14, 2018* -
## physics

Calculate the component of a force of 200N at a direction of 60degre to the force

*asked by abiy on October 26, 2016*

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