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For a certain experiment, R-140a vapor is contained in a sealed glass tube at 20 degrees celcius. We want to know the pressure at this condition, but there is no means of measuring it since the tube is sealed. However, if the tube is cooled to -20 degrees celcius, small droplets of liquid are observed on the glass walls. What is the initial pressure?
i in co2 the first excited vibrational level is 30 kjmol above the ground level. calculate the population in the first
Molar concentration, 2.20g of solid NaOH are added to 250mL of a 0.10M FeCl2 solution. Given that Ksp for Fe(OH)2 is 1.6 x 10 -14, calculate the following
determine the identity of the diatomic gas when a boy places 59.5 gm of a diatomic gas into a ten litres container at
1.00 grams of magnesium and 2.50 grams of oxygen react together in a synthesis reaction to form magnesium oxide. write
Calculate the concentration of ALL species in a 0.01 M solution of NaN3. The Ka value for hydrazoic acid, HN3, is 1.9 x 10^-5.
gold bars are plated from an aqueous solution of gold chloride (AuCl3) by using a current of 50 Amperes. With this current, how long would it take to plate out a 1 pound bar of gold worth almost $ 25,000? 453.59 grams weigh a pound.
If 3.8 kcal is released by combustion of each gram of glucose, how many kilocalories are released by the combustion of 1.41 mol of glucose?
State three acids, bases, and salts used in therapeutic processes. Describe how one of each is used in therapeutic processes.
The valve between the 2.00L bulb, in which the gas pressure is 1.00 atm, and the 3.00L bulb, in which the gas pressure is 1.50 atm, is opened. What is the final pressure in the two bulbs, the temperature remaining constant
What will the new volume of the gas be if the temperature is increased to 150C and the pressure decreased to 0.95 atm?
Consider the reaction N2 (g) + O2 (g) ? 2 NO (g).a. How many g NO can be produced when 25.0 g of nitrogen reacts? b. How many g NO can be produced when 25.0 g of oxygen reacts? c. Based on your answers in a and b,
Calculate the number of moles of the H2O2 in the 10.00 mL sample in every titration from the volume of KMnO4 used and the stoichiometry of the reaction.
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