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Explain what will the volume of 254 cm3 of gas be at STP if its current temperature is 72.6 degrees C?
a laboratory sample of gas is known to have a carbon monoxide concentration of 50 ppm. a spectrophotometer is used to
Calculate the pH of this solution. When 0.20 mol of H+ ions is added to the solution what is the pH (assuming volume change is negligible)
What is the pH of concentrated sodium hydroxide? NaOH FW=40.0 g/mol
Describe how to prepare 100 ml of 0.200 M acetate buffer, pH 5.00 starting with pure liquid acetic acid and solution contaning ~3 M HCl and ~3 M NaOH
Calculate the mole fraction of each component in resulting mixture after oxidation assuming that H2O is present as a gas.
What volume of CO2 would be produced each day? Suppose the gas mixture produced by the decomposition is trapped in a container at 17 degree celcius
How many grams of NaOH are contained in 230.0 mL of a 0.800 M sodium hydroxide solution?
25mL of a .10M solution of the weak acid hydrofluoric acid, HF, is titrsted with .10M solution of the weak base amonia, NH3. Will the pH at the equivilance point be less than 7 equal to 7 or greater than 7? Explain. Ka for HF is 7.2e-4 and Kb for ..
A sample of oxygen gas () was found to effuse at a rate equal to three times that of an unknown gas. The molecular weight of the unknown gas is __________ g/mol.
a solution containing 82.0 g of ascorbic acid dissolved in 230 g of water has a density of 1.22 gml. calculate the
The reaction 2A + B --> C + D has an activation energy of 80.0 kJ/mol. At 320°C, the rate constant k = 1.80 x 10-2 L mol-1 s-1. What would be the value of k at 450°C?
How many calories are needed to raise the temperature of 525g of beryllium from 21.0 celsius to 375 celsius?
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