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How can the difference in the molar enthalpy of solution of different salts be explained in terms of relative charge and size of the ions? Specifically, the compounds KNO3, NaCl, NH4Cl, and NaOH
A rectangular beam made using concrete with f'c = 6000 psi and steel with fy=60000 psi has a width b= 20 in. The concrete modulus of rupture fr=530 psi. The elastic moduli of the concrete and steel are, respectively,
500.0mL of 0.130 M NaOH is added to 535mL of 0.250 M weak acid ka= 8.22x10-5. Explain what is the pH of the resulting buffer. HA(aq)+ OH-(aq)---> H2O(l)+A-(aq)
Hard water deposits are largely CaCO3. Propose a way to remove these deposits from plumbing fixtures.
unused lead nitrate to the container marked"sodium nitrate". What could the student do to get all the led ions out from the sodium nitrate?
write equations showing how caffeine could be extracted from an organic solvent and subsequently isolated.
determine the mass of agno3 mw 170gmol required to dissolve in 400 ml solution in order to prepare a solution which is
calculate the ph of each solution given the following h3oor oh- values. express your answer using two decimal
A 6.9L balloon is filled with He at 1.00 bar pressure at 298k. How many He atoms are in the balloon?
Fin the mass of AlCl3 that is produced when 25.0 grams of Al2O3 react with HCl according to the following balanced equation
Sketch the phase diagram of a pure substnace from the follwoing data. (A log P scale may help). There are two solid forms X and Y, which are both denser than the liquid, and Y is denser than X.
Calculate the number of grams of solute that would be needed to make each of the following solutions
Determine the wavelength, of an alpha particle with a(KE) kinetic energy of 8.0 10-13 Joules
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