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Problem- An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air. If the flask volume is 3.50 L, and the air is at standard temperature and pressure, how many gaseous molecules does the flask contain?
Please explain above problem in step by step manner so I can easily understand it
A student is asked to determine the formula of a hydrate of colbalt (II) chloride. The mass of the empty clean, dry crucible and cover, after heating is 22.446 g. A sample of 0.324 g of cobalt chloride is added to the crucible.
What mass of potassium bromide residue remains if 500.0 mL of 0.200 M potassium bromide solution are evaporated to dryness?
A 20 mg sample of a compound is dissolved in 5.0 ml of water and extracted with 2.5 mL of heptane.After separation of the layers, the heptane layer is found to contain 15 mg of the compound. What is the partition coefficient of the compound, Khept..
Find the pH during the titration of 20.00 mL of 0.1760 M butanoic acid, CH3CH2CH2COOH (Ka = 1.54 10-5), with 0.1760 M NaOH solution after the following additions of titrant.
The chemical equation for the hydration of Fe2O3 to form rust and the classification of this reaction.
Titrate 80ml of NH3 w/35ml of 0.30M HCl. Find pH and select an indicator beside bromocresol green that can be used.
the following reaction were found to be PA = 4.00 atm, PB = 8.40 atm, PC = 5.70 atm, and PD = 1.60 atm. What is the standard change in Gibbs free energy of this reaction at 25 °C.
How many grams of ammonium sulfate should be dissolved in 160 ml of water for the preparation
The precipitate was filtered, dried, and weighed. A total of 1.55 g calcium flouride was collected. What was the percentage of CsF in the original sample.
finds the antilog ratio of acid and base and determines that for every 1ml of acid she needs 2.29 ml of acid. what is the final concentration in molarity of the sodium acetate and the acetic acid?
He decides to run an FTIR on the resultant powder on the cold finger apparatus. WHat functional group would clearly cofiirm that the white powder is indeed caffeine and not catechin?
The secondary bonding of gas molecules to a solid surface is a common mechanism for measuring the surface area of porous materials, by lowering the temperature of a solid well below room temperature, a measured volume of gas will condense to form ..
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