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Remember that M1V1=M2V2. What volume of distilled water do you need to add to dilute 10 mL of a 100 mM Tris- HCl buffer solution to a concentration of 10 mM?
Determine deltaHvap for a compound that has a measured vapor pressure of 24.3 torr at 273 K and 135 torr at 325 K.
The final temperature of the system was found to be 28.4 C. Calculate the specific heat of the metal. The heat capacity of the calorimeter is 14.4J/C.
A student wishes to make a soution of lithium hydroxide (LiOH) to a strength of 1.7 mol/L. If he is going to make a total volume of 1.5 L
Which element has 55 neutrons, 36 electrons, 40 protons and has a mass of 95. I know its 95Mo but does it have a ion charge of +2,+4,or+6? I've tried +2 and +6 but its wrong. Help would be appreciated.
A titanium bicycle frame contains the same amount of titanium as a titanium cube measuring 6.6cm on a side. 1) Use the density of titanium to calculate the mass in kilograms of titanium in the frame.
The heat of neutralization of HCl by NaOH is H°rxn = -56.2 kJ/mol. How much heat is released when 125 mL of 1.750 M HCl is mixed with 195 mL of 0.667 M NaOH.
The volume of a certain gas sample is 235 mL when collected over water at a temperature of and a pressure of 698 mmHg. What will be the volume of this gas sample when measured dry at a standard pressure? The vapor pressure of water at this tempera..
The same reactant decomposes with a half-life of 211 s when its initial concentration is 0.160 M. Determine the reaction order
The reaction of calcium hydride with water can be used to prepare small quantities of hydrogen gas, as is done to fill weather observation balloons.
calculate the PH of a buffer solution prepared by dissolving 21.5 g benzoic acid and 37.7g sodium benzoate in 200.0 mL of solution?
At a certain temperature the equilbrium constant is 396 K for H2(g) + I2(g) ↔ 2HI(g) , Calculate the the equilbrium constant for 0.5H2(g) + 0.5I2(g) ↔ HI(g)
Use the Variational Principle a to estimate the ground state energy of a harmonic oscillator with un-normalized trial wavefunction φ(x)=1/(1+βx2)2 where β is a paramete
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