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1.2 mol of helium is mixed with 2.3mol of argon in a volume of 1.0L and a temperature of 25.0 degree C. Assuming that helium and argon are perfect gases, what is the pressure of the mixture?
Liquid pentane (C5H12) has a density of 0.6262 g/mL at 20°C. Find the true mass (mtrue) of pentane when the mass weighed in air is 12.580 g. Assume the air density is 0.0012 g/mL and the balance weight density is 8.4 g/mL.
sodium borohydride reduction experiment write the balanced equation for the reaction and calculae the percent yield
One of the key steps in brewing beer (or brewing root beer, if you prefer) is conversion of starch stored the barley into di- and trisaccharides through a process called "mashing" of the grain
An unknown compound has a forula of CxHyOz. You burn 0.1523 g of the compound and isolate 0.3718 g of CO2, and 0.1522 g of H2O. What is the empirical formula of the compound?
A gas sample containing 1.47 mol at 25°C exerts a pressure of 401 torr. Some gas is added to the same container, and the temperature is increased to 50.°C. If the pressure increases to 800. torr,
performed using 1.8912g of zinc and 1.5965g of iodine. Determine the limiting reactant and calculate the theoretical yield of zinc iodine in grams.
An unknown Cu2+ sample gave an absorbance of 0.262 in an atomic absorption analysis. Then 1.00 ml of solution containing 100.0 ppm Cu2+ was mixed with 95.0 ml of the unknown, and mixture was diluted to 100.0 ml in a volumetric flask.
A 3.5g sample of water reacts with PCl3 according to the following equation: 3H2O+PCl=H3PO3+3HCl How many g of H3PO3 are produced.
What mass of helium gas is needed to pressurize a 120.0 L tank to 264 atm at 25°C?
What mass of sucrose should be combined with 488 of water to make a solution with an osmotic pressure of 8.25 at 280.
Propose structures for aromatic hydrocarbons that meet the following descriptions:
Calculate the number of molecules inside the cell, which is 3.6um long and 1.2 um in diameter.
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