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a. Determines the mass of an unknown gas to be .43 grams at 37 C as well as 720 mm Hg in a 250 mL container. Explain what is the molecular mass of the unknown gas? Use n=(PV/RT) but a little confused on where to proceed.
b. A gas is enclosed in a cylinder fitted with a piston. The volume of the gas is 1.50L at .86 atm. If the piston is moved to increase the gas pressure to 2.33 atm, explain what will the final volume be?
what is the solubility of O2 at an elevation of 12,000 ft where the atmospheric pressure is 0.657 atm? Assume the temperature is 25°C, and that the mole fraction of O2 in air is 0.209 at both 12,000 ft and at sea level.
a) If the initial sample is 8.50 g, what mass of the original iridium-192 remains after 130 days? b) Estimate the half-life of the radioisotope. c) How many days would it take for one-fourth of the sample to decay?
Since there isn't an oxygen or some other electronegative atom in the molecule I'm not sure which peaks are which.
Consider the titration of 100.0 mL of 0.100 M NaOH with 1.00 M HBr. Find the pH at the following volumes of acid added and make a graph of pH versus Va: Va = 0, 1,5,9, 9.9, 10. 10.1. and 12 mL.
0.02 grams of AgNO3 is dissolved in 1.0 L water. What is its concentration as parts per million
An unknown metal hypochlorite salt, M(ClO)2, is subjected to analysis by iodometric titration: the salt is dissolved in dilute sulfuric acid, treated with excess aqueous KI, and then titrated with Na2S2O2 in the same manner as in your experiment
Determine the mass of a mixture of 1.33x10^24 formula units of Sodium sulfate, 1.500 moles of Water and 3.77g of silver chloride?
Which of the following elements would you expect to gain electrons in chemical changes
Two gases are cobntained in gas bulbs connected by a valce. gas a is present in a 1 liter bulb at a pressure of 927 torr. gas b exerts a presure of 254 torr in a 1 liter bulb. the valve is 0pened and the two gas equilibrate. what is the partial pr..
The volume of sea water displaced by the plastic block is 2.37 cm3. Assuming the density of the sea water is 1.025 g/mL, what is the density of the plastic?
What is the maximun number of ballons that can be inflated. Assume that the gas in the cylinder is at the same teperature as the inflated ballons.
A suspected case of ingestion of the organophosphate malathion has entered the emergency room. A STAT pseudo cholinesterase produced a very low result. Prior to the initiation of therapy, an erythrocyte cholinesterase is drawn
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