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During the quick titration of 10mL of lemon juice with 0.1053mol/L NaOH, a student dispensed 82mL sodium hydroxide(titrant) into the lemon juice(analyte) before the end point was reached.Estimate the analyte concentration, assuming that the acid in the lemon juice is monoprotic.
The bacteria Azotobacter chroococcum grows aerobically and plays an important role in the soil nitrogen cycle. Azo can bind atmospheric nitrogen which is inaccessible to plants then release ammonia ions into the soil that plants can absorb
Compute the atomic mass of 109Ag if natural abundance of 107Ag is 51.87% & atomic mass =106.905 amu and determine the probability of particle would be located in the range
The emission spectrum of an unknown element contains two lines-one in the visible portion of spectrum and the other
The water level in a graduated cylinder initially at 225 rises to 278 after a piece of lead is submerged. What is the mass in grams of the lead?
Use a spreadsheet to calculate the composition of dry air at 5400K and 1 bar. Take the initial composition as .78 mol N2, .21 mol O2 and .01 mol Ar. Neglect the ionization of NO.
Calculate the resulting CO2 concentration in the atmosphere 30 years from now assuming that we will use only coal to generate electricity. Assume efficiencies of 40% for power plants.
A solution is prepared by mixing 3.9 g of FeCl3 with enough water to make 125.0 mL of solution. Calculate the molarity of the solution.
A is allowed to come in contact with substance B. B has a mass of 46.28 grams and its initial temperature is 86.5oC. These two substances reach thermal equilibrium at a temperature of 64.2oC. If the specific heat capacity of substance B is 1.17 J/..
the only difference between succinate and fumarate is the geometry around their double bonds, one contains a cis double bond,
Write balanced chemical equations for the following reactions.
The half-life of a certain radioactive element is 1250 years. What percent of the atoms remain after 7500 years?
Mercury has a density of 13.6 g per mL. A barometer holding 9.50mL of mercury has broken. The cost of mercury disposal is based on mass. How many kilograms of mercury were in the barometer?
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