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1. The partial pressure of O2 in a sample of air on a mountain top is 115 mmHg. The oxygen makes up 21% of the gas in the atmosphere. What is the total atmospheric pressure on the mountain top?
2. A gaseous mixture contains 54% N2, 39% O2, and 7% CO2 by volume. If the total pressure is 813 mmHg at STP, what is the partial pressure of each of the gases?
3. What volume would be occupied by 80 g of nitrogen gas at a pressure of 1.8 atm and a temperature of 25°C?
4. A gas occupies 0.12 mL at 100 K. At what Celsius temperature will its volume be 2.00 mL? Assume the pressure remains constant.
Vitamin B12, also known as cobalamin, has the molecular formula C63H88N14PO14Co. What mass of CO2 and H20 would be produced during the combustion analysis
A swimming pool contains 88,000 liters of water and it having a surface area of 5 meters by 10 meters. It is observed that when this swimming pool is heated by the Sun for six hours.
sulfate pentahydrate are made into a solution with 512.441 g of water. What is the molality of the copper sulfate solution?
What volume of 0.200M Hydrochloric acid must combined to 250mL of 0.300M C8H7NaO3 to produce a buffer of solution with a pH of 3.37?
What is the composition in mole fractions of a solution of benzene and toluene that has a vapor pressure of 35 torr at 20 °C? Assume the mixture forms an ideal solution.
what is the molar mass of a sample of gas that has a dnesity of 1.09 g/L at 1.02 atm pressure and 25.0C.
structure of the substance to be used in this experiment to initiate free radical chain chlorination
What biochemical changes are required to convert tyrosine to (a) norepinephrine and (b) epinephrine? and 3- Some bacterial signaling systems involve kinases that transfer a phosphoryl group to a His side chain. Draw the phospho-His side chain.
Which statement is true for the cell as it discharges?
What is the density of a substance if a 2.50mL sample has a mass of 0.880g at room temperature? ( show calculations) What is the specific gravity of the substance?
if a 1.00 g piece of gold (density = 19.32 g/cm^3) is hammered into a sheet 8.0 x 5.0 ft what is the average thickness of the sheet in meters?
How many moles of CH_3_COOH are present in the beaker? What is the concentration of acetic acid?
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