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High-purity benzoic acid (C6H5COOH; ?Hcomb = -3227 kJ/mol) is a combustion standard for calibrating bomb calorimeters. A 1.169 g sample burns in a calorimeter (heat capacity of calorimeter alone = 1365 J/°C) that contains exactly 1.200 kg of water.
A stream of air (21% O2 m, the rest N2) flowing at a rate of 10.0 kg/h is to be mixed with a stream of CO2 inside a mixer. The CO2 enters the mixer at a rate of 20.0 m/h at 150 ?C and 1.5 bar. What is the mole percent of CO2 in the product stream
1000g of Na2HPO4 is dissolved in 100mL of water. using mass balance and charge balance deterimne the pH of the resulting.
Assume that .20 mol of the acid is added to 250 mL of water. To make a buffer of pH = 4, how many moles of the conjugate base must be added to the solution?
the ratio of the no of molecules in the excited state at the temperature of 213 K to the number of ground state molecules and the percent of the excited molecules at 213 K.?
What are the masses of CO and CO2 in the tank and what are the partial pressures of each of the three gases at 24C?
A sample of nitrogen gas in a 4.7-L container at a temperature of 28°C exerts a pressure of 3.6 atm. Calculate the number of moles of gas in the sample.
The manometer shown below measures the pressure of the water in the tank. Using variables for the densities (no values given), find the gage pressure at point A.
use curved arrows to show the flow of electrons in each step, and note any relevant charges or lone pairs of electrons.
The density of diamond is 3.51 g/cm . The international (but non-SI) unit for weighing diamonds is the "carat" (1 carat = 200 mg exactly.) What is volume of a 0.66 carat diamond?
what mass ratio of sugar to water is required to raise the boiling point of a sugar solution 145 degrees celcius?
Describe the health and sfety concerns of using H2S and thioacetamide as the S2- donor. which is used most frequently and why is its use preferential?
Evaporation and its Effects on PCP and Cresol, We are asked to explain the phenomena of how 1 gram of liquid water at 35 degrees C
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