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One liter of 1M acetate buffer at pH = 4.5 is mixed with 600 ml of .5M acetate buffer at pH = 4.8 and then one liter of HCl (0.1M) is added. What is the pH of the final solution?
A 2.00 L glass soda bottle filled only with air is tightly capped at 24 C and 744.0mmHg. If the bottle is placed in water at 75C what is the pressure in the bottle?
What is the pH at the half-stoichiometric point (that is, what is the pH when you have added 50% of the total volume of base required to react with all of the acid originally present?)
2500 kg/hr of a mixture containing equal parts by mass of benzene and toluene are distilled. The flow rate of the overhead product stream is 988 kg/hr , and the bottom stream contains 17.03 wt% benzene.
Ethanol has {rm mp} = -114.5 ^circ {rm C}, {rm bp} = 78.4 ^circ {rm C} , Delta H_{rm vap} = 38.56 {rm kJ/mol} and Delta H_{rm fusion} = 4.60 {rm kJ/mol}. The molar heat capacity is 113 {rm J / left( K cdot mol right)} for the liquid and 65.7 {rm J..
An experiment shows that a 250mL gas sample has a mass of 0.434g at a pressure of 744mm Hg and a temperature of 27C. What is the molar mass of the gas?
Compute the number average molecular weight for a polypropylene for which the degree of polymerization is 15,000.
A certain substance has a heat of vaporization of 29.00 kj/mol. At what Kelvin temperature will the vapor pressure be 3 times highe
how many joules of heat are needed to completely vaporize 24.40 g of water at its boiling point?
Zinc has two isotopes. Zn-64 has an atomic mass of 63.9292amu and Zn-72 has an atomic mass of 71.9278amu. Its average atomic mass is 65.38amu. Calculate the abundance, in percent, of Zn-64.
Given a concentration of 100 ppm in water, calculate the predicted equilibrium concentration concentration in air for methyl tertiary-butyl ether (MTBE)
The mass spectrum of an organic compound shows the relative abundances of M to be 44.42% and M 1 to be 10.57%. Assuming the peaks are caused by 12C and 13C isotopes
These sections had about 1000 people. There were 10 of these sections in the picture. The other 10 sections had people standing further apart. These sections contained about 500 people each. How many people would you estimate were at the event?
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