# 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 208-
## Science

An object is projected at an angle of elevation of 45 degree with a velocity of 100m/s. Calculate it's range

*asked by Prithvi on January 5, 2017* -
## chem

calculate the pressure on mmHg of 0.0108mol of methane (CH4) in a 0.265 flask at 37 Celsius

*asked by shornora on February 18, 2018* -
## Statistics

Test a claim p=0.5 with the significance level of 0.05 and n=49 calculate beta when the true probability porportion is 0.7.

*asked by meena on June 25, 2012* -
## physics

an airplane taking off from a landing field has a run of 500m. Calculate the average acceleration in ft/s2.

*asked by kima on April 25, 2013* -
## Math

Use the formulas V=s❸ andA=6s❷ to calculate the volume and surface area of the cube That is 2.5 in. on each side.

*asked by mikil on August 12, 2013* -
## science and technology

calculate the work done if a force of 80N is applied to a ball to move it to a distance of 24m.

*asked by yakubu shehu on December 31, 2015* -
## chemistry

A mixture formed by adding 55.0 mL of a 1.5x10^-2 M HCl to 140 mL of 1.0x10^-2 M HI. How do you calculate the pH for this problem?

*asked by brad on February 26, 2012* -
## General Chemistry

Calculate the E of the following cell if [CIO3] = 1.5M, [H]= 0.5M, [CI]=1.0M and [CU2]= O.25M: CI03 + 3CU + 6H = CI- +3Cu2+ +2h20

*asked by Ashley on November 22, 2010* -
## Chemistry

the solubility of aluminum sulfate in water at 20 degrees celcius is 26.7 g/100mL Calculate the molarity?

*asked by Gina on October 24, 2014* -
## physics

calculate the speed of waves in a puddle that are 0.15m apart and made by tapping the water surface twice each second

*asked by charlie on February 11, 2011* -
## chemistry

calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n=5 to n=1 how do I do this?

*asked by Lisa on November 21, 2010* -
## chemistry

calculate the solubility of SrF2 (ksp=7.9E-10) in 0.100 M Sr(NO3)2 ? The answer is 4.44E-5 M how do you get that? I Have no clue?

*asked by JF on March 25, 2015* -
## Chemistry

Calculate the concentrations of Cd2 +, [Cd (CN) 42] and CN at equilibrium when they dissolve 0, 42mol of Cd(NO3)2, molarity= 2.50 M Kf =7.1x10^16

*asked by Victor on April 23, 2016* -
## physics

A ball of mass xg is release from a height of 20m . Calculate the time taken to fall to the ground.

*asked by Fine-girl on November 13, 2011* -
## physics

Calculate the distance you will travel if you maintain an average speed of 12km/h for one-half hour.

*asked by Mia on September 8, 2014* -
## physics

A ball of mass xg is release from a height of 20m . Calculate the time taken to fall to the ground.

*asked by Fine-girl on November 13, 2011* -
## geometry

circle E with a diameter AC and m

*asked by robin on April 24, 2015* -
## Chemistry

Consider the equation A(aq) + 2B(aq) 3C(aq) + 2D(aq). In one experiment, 45.0 mL of 0.050 M A is mixed with 25.0 mL 0.100 M B. At equilibrium the concentration of C is 0.0410 M. Calculate K.

*asked by Sana on February 16, 2014* -
## 5th grade

hwo would I calculate the original discount price of and item if coast 150 and was sold to me at 75

*asked by ernie on December 23, 2010* -
## chemistry

Calculate the pH at the stoichiometric point of a titration of 25.0 mL of 0.120 M benzoic acid with 0.0230 M NaOH

*asked by lawerence on March 26, 2015* -
## geometry

Calculate the lateral and surface areas of a prism whose height is 12 cm and whose base is a rectangle with dimensions 5 cm by 7 cm.

*asked by JOY on May 12, 2011* -
## science

The volume of 3.96 g of a gas sample at standard conditions it was found to be 1.15 L.Calculate its molecular mass?

*asked by Jaco on April 13, 2014* -
## chemistry

from Balanced CaCO3+2HCL-CaCL2+H2O+CO2 and 7.2*10^-3 L Calculate moles titrated

*asked by Everett on February 9, 2012* -
## Chemistry-Dr.Bob222

A 25.0 mL sample of 0.125 M pyridine is titrated with 0.100 M HCl. Calculate the pH at 0 mL of added acid.

*asked by Nevaeh on April 19, 2016* -
## Chemistry

how do i calculate the temperature in Celsius of a 3.50L,0.75 mole sample of ammonia at 1.0 atm of pressure

*asked by Jerrad on March 14, 2012* -
## geometry

An object is made from a cylinder with a hemisphere at each end.r=5cm, height=12 .Calculate volume.

*asked by reshma on February 16, 2011* -
## statistics

3coins are tossed calculate the followin probabilities p(3heads) p(2heads and 1 tail) p(3 tails)

*asked by shumaila.imtiaz on April 20, 2014* -
## chemistry

Calculate the mass of KHP which will result in an endpoint of 20.00mL when titrated against 0.097M NaOH

*asked by xx on October 28, 2014* -
## Chemistry

the solubility of aluminum sulfate in water at 20 degrees celcius is 26.7 g/100mL Calculate the molarity?

*asked by Gina on October 28, 2014* -
## Wave

A radio transmits at a frequency of 6 * 10^5Hz. If the speed of the signals is 3 * 10^8m/s, calculate the wavelength of th wave.

*asked by Godwin on December 29, 2015* -
## chemistry

a copper block has a mass off 80 grames and occupies a volume of 9.5cm3 calculate its density

*asked by alex on October 26, 2010* -
## Chemistry

A star is estimated to have a mass of 4.4x1026lbs. It has a diameter of 8.69x105 mi. Calculate the density in g/cm3.

*asked by Kay on September 3, 2015* -
## Mabel hill, physics

Two force,3N and 4N act on a body in the direction due north and east respectively. Calculate their equilibrium?

*asked by Gift on October 12, 2015* -
## chemistry

Calculate the number of moles and atoms. A)64 gm of O2 B)58.9 gm of CI C)90.5gm of (HN4)2SO4 D)243gm of Mg2

*asked by twynna on February 13, 2011* -
## physics

a person throws a ball upward into the air with an initial velocity of 20.0 m/s, calculate how high it goes

*asked by Anonymous on February 3, 2010* -
## Chemistry

Calculate the pH of the buffer formed by mixing equal volumes [C_2H_5NH_2]= 1.68 M with [HClO_4]= 0.966 M . Kb=4.3×10−4.

*asked by Ayaka on April 16, 2016* -
## Chemistry

Calculate Kc. CH_4(g) + H_2O(g) CO(g) + 3H_2(g) Kp= 7.7 x 10^24 at 298K. Should I use the formula Kp= Kc(RT)^Deltang If so I have no idea where to start.

*asked by Savannah on April 16, 2014* -
## math

You are asked to calculate gas mileage for a car, and your answer comes out with units of gal/mi. This means that

*asked by pedro on September 20, 2015* -
## Physical Science

a.Calculate which one of the reactants will be used up if 20g of Fe is mixed with 10g of S and heated. b.How many grams of the other reactant were in excess?

*asked by Heather on October 10, 2011* -
## physics

calculate the linear momentum of a truck with a mass of 13065kg that is traveling at 36m/s eastward.

*asked by kellye on October 5, 2013* -
## Chemistry 1002

Calculate the standard entropy change for the following reaction at 25 °C. 2 Al (s) + 3 ZnO (s) --> Al2O3 (s) + Zn (s) answer is in J/K mol

*asked by Jen on March 27, 2015* -
## chemistry

calculate volume of co2 produced by combustion of 40 ml of acetone in presence of excess oxygen?

*asked by siddhant on August 8, 2010* -
## Chemistry

Calculate the change in entropy (in J/K) when 86.4 g of water is heated from 17.5 ºC to 76.5 ºC at 1 atm. (The specific heat is 4.184 J/(g-K).)

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

14,0 of KOH is neutralised in 1dm^3 of water by sulphuric acid with a concentration at 0,1 mol dm^-3 how do i calculate it

*asked by happy on May 24, 2015* -
## Chemistry

Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n = 6 to n = 1.

*asked by Laurie on October 10, 2013* -
## chemistry

Q.1 Calculate the extent of hydrolysis of 0.005M K2CrO4.If K2=5*10^-7 for H2CrO4.(It is essentially strong for first ionisation).

*asked by mohit on January 8, 2010* -
## maths

how can i calculate the area of a field if the perimiter is 11m and bredth is 100m radius is 60m?

*asked by sekemisa school on September 13, 2014* -
## physcis

Calculate the total energy of 2.0 kg object moving horizontally at 10 m/sec 50 meters above the surface.

*asked by Nallely on January 6, 2011* -
## computer science

Write an application that calculates the value of e^x by using the following formula:e^x=1+(x/1!)+(x^2/2!)+(x^3/3!)... Allow the user to enter the number of terms to calculate

*asked by Gina on October 7, 2010* -
## physical

calculate the total energy of a 2-kg object moving at 10m/sec 50meters above the surface.

*asked by Anonymous on November 15, 2010* -
## physics

hummingbirds beat their wings 1500 times in 30seconds calculate frequency and the period

*asked by noah on January 12, 2015* -
## Maths

Sketched are the graphs of f(x)+x squared +4x-12,calculate the lenght of rs if s is the turning point of the para bola

*asked by Sphiwe on September 15, 2011* -
## chem

I am trying to figure out how to calculate the ratio of CH3NH2 to CH3NH3Cl required to create a buffer with pH of 10.26, I'm not sure where to start.

*asked by moe on October 25, 2010* -
## principles of physics

Calculate the change in potential energy of 7.8 million kg of water dropping 50 m over Niagara Falls.

*asked by britches on February 22, 2012* -
## chem

I am trying to figure out how to calculate the ratio of CH3NH2 to CH3NH3Cl required to create a buffer with pH of 10.26, I'm not sure where to start.

*asked by moe on October 25, 2010* -
## maths

in a triangle ABC, C=10CM A=12CM ANGLE B Is 20 DEGREEZ calculate the lenght of side b

*asked by anjai on April 13, 2011* -
## 11th grade

Calculate the root mean square,average and most probable speed of oxygen at 27degree celcius

*asked by Gaurav on September 24, 2010* -
## PHYSICS

Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.

*asked by Mattie on October 29, 2010* -
## Physics

A person is travelling 6 km (E) then 4 km (N) and finally 2 km (W). Calculate the average speed And velocity. Show your work

*asked by Mika on March 4, 2014* -
## finance

You will calculate the past three years worth of financial ratios found on page 119

*asked by Anonymous on May 9, 2011* -
## physics

Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where V1 = 5.0 10-3 m3 and V2 = 20.0 10-3 m3.

*asked by sam on December 6, 2013* -
## Math help

Calculate the average mathematical gradient of a slope that rises 450m over a horizontal distance of 1.8 km.

*asked by SRay on May 28, 2010* -
## college chemistry

Calculate the amount of heat required to evaporate 27.5g of water at 100.0 degrees Celsius

*asked by Anonymous on May 1, 2010* -
## Biology 12

Triaglyceride with three F.A.chains of 20 carbon how to calculate the ATP production Plz show the steps thank you

*asked by Tarkan on April 5, 2011* -
## Biology HELP

Triaglyceride with three F.A.chains of 20 carbon how to calculate the ATP production Plz show the steps thank you

*asked by Tarkan on April 5, 2011* -
## Geometry

Calculate the lateral and surface area of a prism whose height is 12 cm and whose base is a rectangle with dimensions 5 cm by 7 cm.

*asked by Mary on May 11, 2011* -
## physics - power(1)

A grocer lifts an 8.0-kg carton from the floor to a height of 0.80 m in 5 sec. Calculate the power of man.

*asked by Mota on January 16, 2010* -
## Physics-Please help

Could someone remind me how to calculate this on the TI-84 Calculator: Which buttons do I hit for this: 3 * 10^8/5.4 * 10^14 I'm inputting it and coming up with 5.55 E 21 It should come out to be 5.55 *10^-7 but I'm not doing the input correct Please help

*asked by Leah on February 8, 2011* -
## Chemistry

Calculate the mass in grams of 0.000025 Avagadro's number of rhodium atoms (with the steps please)

*asked by Anonymous on November 6, 2013* -
## Physics nd the TI84 Calculator

Could someone remind me how to calculate this on the TI-84 Calculator: Which buttons do I hit for this: 3 * 10^8/5.4 * 10^14 I'm inputting it and coming up with 5.55 E 21 It should come out to be 5.55 *10^-7 but I'm not doing the input correct Please help

*asked by Leah on February 8, 2011* -
## Physics help on the TI-84 calculator

Could someone remind me how to calculate this on the TI-84 Calculator: Which buttons do I hit for this: 3 * 10^8/5.4 * 10^14 I'm inputting it and coming up with 5.55 E 21 It should come out to be 5.55 *10^-7 but I'm not doing the input correct Please help

*asked by Leah on February 8, 2011* -
## microeconomic

how to calculate price elasticity of demand of $3.00 to a increase to $3.50 and explain your reasoning and interpret the results

*asked by susie quick on March 27, 2010* -
## Chemistry

Calculate how many moles of sodium hydrogen carbonate are needed to produce 59 grams of H2O.

*asked by Keya on February 11, 2012* -
## Chemistry

Calculate how many moles of sodium hydrogen carbonate are needed to produce 59 grams of H2O.

*asked by Keya on February 11, 2012* -
## physics

calculate the work done on n mole of a vander waal gas is an isothermal expansion from volume vi to vf.

*asked by abdulmueed on October 20, 2015* -
## Davis

Calculate the mass of water produced when 4.36g of butane reacts with excess oxygen.

*asked by Aimee on March 29, 2015* -
## chemistry

Calculate the number of moles in each of the following: 0.150 g of salicylic acid 0.30 mL of acetic anhydride (density = 1.08 g/mL)

*asked by Pat on February 24, 2012* -
## tokarara

Calculate work done if a force of 300N is applied at 30° to the horizontal and the body moves 20m

*asked by tina loko on July 14, 2015* -
## Chemistry

The solubility of aluminum sulfate in water at 20degrees Celcius is 26.7g/100L. Calculate its molarity?

*asked by Gina on October 29, 2014* -
## College Chemistry

Calculate the molar solubility of Mn(OH)2 in grams per liter when buffered at pH 8.5 Mn(OH)2=88.953g/mol; Ksp=1.9 x 10^-13

*asked by Patrice on December 6, 2010* -
## physics

show working calculate, how far will a stone fall during the sixth hour of rest?(g=ms2)

*asked by ddf on June 22, 2011* -
## chemistry 32

Calculate the concentration, in molarity, of a solutiion prepared by adding 9 mL of water to 1mL of 0.1 M of HCl

*asked by Adrian on March 10, 2011* -
## Chemistry

Use the data in Table 15.3 to calculate the equilibrium constant for the following reaction: HCOOH(aq) + OH(aq) HCOO(aq) + H2O(l)

*asked by vichka on March 10, 2011* -
## Chemistry

What is the value of the rate constant at 17 degrees celsius? The Ea = 122 kJ/mol I know I have to use ln k = ln A - Ea/RT.. but I don't know how to calculate it without known ln A and how do you find ln A Thank you for your help!

*asked by Vicky on February 6, 2012* -
## physics

vector b has x,y, and z components of 4.0, 6.0, and 3.0 units, respectively. Calculate the magnitude of b and the angles that b makes with the coordinate axes.

*asked by Anonymous on October 13, 2010* -
## Chem

Calculate the volume of methane produced by the breakdown of 3.19 kg of sugar at 250 K and 702 torr

*asked by Chrisgine on December 14, 2015* -
## College Chem 2

calculate the solunility of silver chromate, Ag2CrO4, in 0.005 M NA2CrO4- Ksp=2.6x10-12 Please help.....

*asked by Deb on March 3, 2012* -
## Chemistry

I'm not sure how to calculate the ΔH°rxn for 3 Al + 3 NH4ClO4 -> Al2O3 + AlCl3 + 3 NO + 6 H2O. I'm honestly not sure where to start with this problem.

*asked by Logan on November 28, 2014* -
## PHYSICS

Calculate for Bohr's atomic model the speed of the orbiting electron in the n = 7 state. (Answer in m/s)

*asked by Physics Lover on March 13, 2016* -
## chemistry

Consider the following equation: CO + 2 H2 → CH3OH △H rxn = -128 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 8.08 g H2

*asked by katia on December 6, 2015* -
## Math

Calculate the number of sides of a regular polygon whose interior angles are each 156 degrees.

*asked by AJ on December 4, 2011* -
## chemistry

calculate the weight of oxalic acid required to neutralise 250 mL , 0.1 N KOH sollution?

*asked by Anonymous on September 8, 2013* -
## Chem 2

Calculate the solubility of silver chromate, Ag2CrO4- in 0.005M Na22Cr)4- Ksp=2.6X10-12 HELP PLEASE......

*asked by DebC on March 2, 2012* -
## chem

Please calculate the energy involved in the following chemical reaction, given the values below: 2Ag + H2S --> Ag2S + H2 -24 -33

*asked by lost girl on March 2, 2014* -
## physics

a boy pulls a bucket of water of mass sky from a well of depth 10 cm calculate the work done ?

*asked by mugilanjali on November 11, 2014* -
## Physics

Calculate the speed of an 7.8×104 kg airliner with a kinetic energy of 1.0 × 109 J. Answer in units of m/s.

*asked by James on February 27, 2011* -
## science

Calculate the mass of SO3 gas that forms when 10g of SO2 reacts with oxygen

*asked by Anonymous on February 26, 2010* -
## Chemistry

Calculate the mass of sodium bicarbonate needed to neutralize 3.0 mL of 3.0 M HCl. Show your work.

*asked by Dan on March 2, 2011* -
## Chemistry

Calculate the mass of sodium bicarbonate needed to neutralize 3.0 mL of 3.0 M HCl. Show your work.

*asked by Dan on March 2, 2011* -
## mathematics

R70000 is invested for five years.calculate a compound interest rate that would double the investment

*asked by cassy on September 13, 2015*

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