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A 12.8 g sample of ethanol (C2H5OH) is burned in a bomb calorimeter with a heat capacity of 5.65 kJ/°C. Using the information below, determine the final temperature of the calorimeter if the initial temperature is 25.0°C. The molar mass of ethanol is 46.07 g/mol
M. tuberculosis, the organism that causes tuberculosis, can be completely destoryed by irradiation with UV light with a wavelength of 254 nm. What is the frequency?
A stream of propane is throttled from 20 bar and 518 K to 0.42 bar. This process is irreversible due to frictional losses at the nozzle.
Explain why the 2.7 μm superficially porous particle enables separations similar to those achieved by 1.8 μm totally porous particles, but the superficially porous particle requires lower pressure.
Write symbol for bromine.What is the atomic number of it in periodic table?How many protons and electrons are there in the atom of bromine?Give the highhest possible and minimal oxidation number for bromine.Determine its molar mass.
It required 22.7mL of HCl to reach the orange-red end point. Calculate the molar solubility and Ksp of calcium hydroxide.
1. compute the henrys law constant of air if the solubility of air in h2o is approximately 2.1 x 10-3 m at the
For the reaction: Ag(s) + SCN-1 ? AgSCN(s) + e- AgSCN is deposited on a pure Ag electrode. If the Ag electrode weighed 12.463 g initially, by how much did it increase in weight after the electrolysis of 75.0 mL of 0.0238 M KSCN
Calculate the molar solubility of AgCl in a solution made by dissolving 10.0 g of CaCl2 in 1.00 L of solution.
The half life of the radioisotope^ 158,47Eu is 1.0 hr.the decay of a 16.0g sample of the isotope to 1.25g required how many hours
What mass of this substance must evaporate in order to freeze 160 g of water initially at 21 0C? (The heat of fusion of water is 334 {J/g}; the specific heat of water is 4.18 {J/g c.K}.)
When ammonium nitrate is added to water, the temperature of H2O drops, but when sodium hydroxide is added to H2O, the temperature rises. Explain why the temperature of water can change in different ways when an ionic substance is added.
The equation for the line in the graph is y= .83x + 0.1226. I do not know if I use this equation or the beer's law
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