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Jude

Questions and answers by visitors named Jude

Questions (63)

An oblique triangle is inscribed in a circle. If one side of the triangle having a length of 10 cm and the angle subtended to
1. 6 answers
2. asked by Jude
3. 7,330 views
The density of a solution of 3.69g KBr in 21.70g H2O is 1.11g/mL. What is the molarity of KBr in the solution.
1. 6 answers
2. 1,537 views
What mass of propanoic acid, CH3CH2COOH, pKa= 4.87, should be dissolved in water to 2.00L volume in order to produce a pH of
1. 1 answer
2. 458 views
At what initial concentration would a solution of acetic acid (ka=1.8x10^-5) be 2% ionized?THANKS! -J
1. 1 answer
2. 358 views
What mass of propanoic acid, CH3CH2COOH, pKa= 4.87, should be dissolved in water to 2.00L volume in order to produce a pH of
1. 4 answers
2. 705 views
At what initial concentration would a solution of acetic acid (ka=1.8x10^-5) be 2% ionized?I am stuck. Thanks -J
1. 3 answers
2. 419 views
When 24.0g og glucose(a nonelectrolyte) are dissolved in 500g of water, the solution has a freezing point of -0.47C. What is the
1. 3 answers
2. 2,264 views
The density of a solution of 3.69g KBr in 21.70g H2O is 1.11g/mL. What is the %w/v of KBr in the solution?
1. 4 answers
2. 603 views
Consider the hypothetical elements X and Y. Suppose the enthalpy of formation for the compound XY is -336 kJ/mol, the bond
1. 4 answers
2. 859 views
What is the mole fraction of methyl n-butyrate CH3(Ch2)2COOCH3 in the vapor phase of a solution consisting of?a mixture of
1. 2 answers
2. 545 views
How many grams of carbon tetrachloride CCL4 must be mixed with 35.96g of ethyl acetate CH3COOCH2CH3 at 50?celsius to produce a
1. 2 answers
2. 576 views
The vapor pressure of pure water at 85 celsius is normally 433.6 mmHg but decrease to 393.8mmHg upon addition?of an unknown
1. 4 answers
2. 833 views
Which of the following will have the smallest freezing point depression?0.1158 m NaF 0.1158 m Na2SO4 0.1158 m K2SO4 0.1158 m
1. 2 answers
2. 492 views
Why would an alcohol/water mixure not freeze at constant temperature.
1. 4 answers
2. 1,504 views
The trachea is ___________ to the lungsToes are _______________to the shoulders Esophagus is _____________ to trachea Pinna is
1. 2 answers
2. 597 views
S2O82-(aq) + 2I-(aq) ----------> 2SO42-(aq) + I2(aq) (I)Rate = k [S2O82-]x [I-]y Rate1 = k [S2O82-]x [I-]y ƒ´ [S2O82ƒ{] Rate
1. 2 answers
2. 1,148 views
Reposting since it wasn't clear in the previous postS2O82-(aq) + 2I-(aq) ----------> 2SO42-(aq) + I2(aq) (I) Rate = k [S2O82-]x
1. 2 answers
2. 1,027 views
At 1473K the equilibrium constant for the reaction H2(g) + Cl2(g) <--------> 2HCl(g)Kc = 2.5*10^4. What would be the equilibrium
1. 3 answers
2. 1,204 views
I did an experiment using 20ml of 0.1M acetic acid and added 8ml of 0.1M NaOH. pH obtained after adding NaOH was 5.2. How do i
1. 2 answers
2. 1,101 views
Metal cations can act as lewis acids in water to produce an acidic solution even though the metal ion contains no hydrogen.
1. 2 answers
2. 524 views
How many moles of NaOBr- must be mixed with 0.1788 mole of HOBr and diluted to 1L to prepare a solution having a pH of 8.7043.
1. 1 answer
2. 479 views
Calculate the[OH-] of a solution of 0.1861M CH3CH2CH2NH3CL if Kb= 5.1*10-4 for CH3CH2CH2NH2
1. 1 answer
2. 430 views
A buffer was made by mixing 0.1522 moles of HCO2H with 0.1832 moles LiHCO2- and diluting to exactly 1L. What will be the pH
1. 2 answers
2. 548 views
What is the solubility of Ca(OH)2 at a pH of 4.802 Ksp of Ca(OH)2 = 6.500*10-6
1. 1 answer
2. 385 views
What is the concentration of Ni2+ in 0.0775M Ni(NO3)2 and 1.3981M NH3
1. 2 answers
2. 541 views
What must be the concentration of F- to just start precipitation of SrF2 from a solution which is 1.202*10-5M i Sr(NO3)2? Ksp =
1. 1 answer
2. 425 views
What must be the concentration of F- to just start precipitation of SrF2 from a solution which is 1.202*10-5M i Sr(NO3)2? Ksp =
1. 3 answers
2. 434 views
What would Qc be if the volume of the container increased by a factor of 1.604 for this reactionSO2+Cl2<---> SO2CL2 kc = 12.821
1. 1 answer
2. 465 views
How many grams of glycerin C3H8O3 must be dissolved in 375.9g of water at 100 degrees Celsius to reduce the pressure of water
1. 3 answers
2. 551 views
What is the mole fraction of methanol CH3OH, in the vapor phase from a solution consisting of a mixture of methanol and propanol
1. 4 answers
2. 1,074 views
What is the vapor pressure in Torr above a solution prepared by mixing 66.73g of benzene C6H6 with 63.26g toluene C6H5CH3 at 20
1. 2 answers
2. 651 views
What is the mole fraction of benzene C6H6 in the VAPOR PHASE from a solution consisting of a mixture of benzene and n-hexame
1. 3 answers
2. 990 views
The vapor pressure of pure water at 90celsius is normally 525.8 but decreased 483mmHg upon addition of an unknown amount of KNO3
1. 2 answers
2. 586 views
Suppose a compound could point in any of two directions in the solid and still have the same energy. How many molecules would
1. 1 answer
2. 473 views
The free energy change for the dissolution of cuco3 at 25celsius is 56.246KJ/mol. What is the solubility of this compound.I used
1. 1 answer
2. 458 views
I think this should be easy but im stuck. Please help:Suppose a compound could point in any of two directions in the solid and
1. 2 answers
2. 1,186 views
If the voltage of the cell is -0.1288V at 25Celsius when [Pb2+]=0.1403M and the pressure of H2=1atm, what is the pHPb(s)+2H+(aq)
1. 3 answers
2. 416 views
How many grams of Al would be deposited from an aqueous solution of Al3+ with a current of 1.430A after 5hrs of deposition.
1. 2 answers
2. 494 views
Can the half cell electrochemistry experiment using a pH meter and aqueous solutions of Cu, Cu2+ and Ag and Ag+ be used to
1. 1 answer
2. 468 views
A rock containing 238U and 206Pb was examined to determine its appropriate age. The molar ratio of 206Pb to 238U was 0.1462.
1. 3 answers
2. 578 views
How much time in years (assume a 365 day yr) would it take for a 1.6678g sample of 239Np to decay to a mass of 0.8671g if it has
1. 2 answers
2. 862 views
How much energy in KJ is release to form one mole of 123Sb from protons and neutrons if the atom has a mass of 122.90422 amu?
1. 2 answers
2. 481 views
So, I'm doing a research project for my chemistry class, and one of the parts that I have to answer is the chemical reaction of
1. 3 answers
2. 507 views
A number multiplied by itself and then by itself again gives -1,000. What is the number? Please show the solution step by step
1. 2 answers
2. 531 views
In a group of quarters and nickels, there are four more nickels than quarters. How many nickels and quarters are the if the
1. 2 answers
2. 605 views
A certain bacteria doubles the number of its cells every 20 minutes. A scientist puts 50 Cells in a culture disk. How many cells
1. 2 answers
2. 780 views
The perimeter of triangle RXA is 39, PX=49 and AP=9.Find RX and RA.P is at the middle. I think it's under triangle bisector
1. 2 answers
2. 474 views
4% on 185000 is what?
1. 1 answer
2. 352 views
A computer is reduced by 15% in a sale. The original price is £560. Calculate the sale price
1. 4 answers
2. 739 views
You have $30 to spend on picking 25 pounds of two different types of fruit at a farm. The apples cost $1.40 per pound the
1. 2 answers
2. 706 views
The+sum+of+two+numbers+is+30+six+less+than+twice+the+smaller+number+is+equal+to+the+number+x+find+the+larger+numberPlease give
1. 3 answers
2. 508 views
A fact was constricted, appropriate, congruent. Speech was coherent, normal rate, rhythm, and volume. Thought process was goal
1. 2 answers
2. 589 views
a vendor sold 100 fresh chicken eggs. eight of them were sold at a profit of 30% while the rest were sold at a loss of 40%. what
1. 3 answers
2. 939 views
which of the following is an example of an art movement?
1. 4 answers
2. 1,677 views
Could I get some help on this question:Calculate the number of grams of CuSO4*5H20 is required to make 50.0 mL of 0.100 mol/L.
1. 1 answer
2. 268 views
An Airplane lives a point on latitude 54°S at 10am. It flies due south at a steady speed 800km(a) what is its latitude at
1. 1 answer
2. 300 views
I am mad today.brainly is dumb.I try and try to make an account but I cant :(😔😔😔😿😿😿😿😿
1. 1 answer
2. 232 views
Simplify 3÷m–2 – m+3n÷(m–n)²
1. 1 answer
2. 227 views
A school club will be competing at a state competition and has been working to raise money for the club's traveling expenses.
1. 1 answer
2. 282 views
Find the real values x and y given that 12+3i/x-iy=-1-i
1. 1 answer
2. 133 views
Calculate the area of a circular of a radius 14cm
1. 4 answers
2. 164 views
Write a letter to your uncle telling about the defuate in payment of your school fess
1. 1 answer
2. 82 views
List 20 fishery industries in Nigeria their locations and what they produce
1. 1 answer
2. 11 views

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