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Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.518g/L at 25 ?C and 721
Apply the steady state approximation to determine expressions for the rate of production of methane, CH4, and of ethane, C2H6.
If 32 mL of 6.8 M H2SO4 was spilled, what is the minimum mass of NaHCO3 that must be added to the spill to neutralize the acid ?
how many grams of ammonium nitrate are necessary to form 0.852 moles water.
How many molecules of ice at 0 degrees celsius can be melted from the complete transfer of the heat involved when 25.6 Grams of nitrogen is reacted with 34.5 L Of hydrogen gas at STP.
Which set of quantum numbers describes the highest energy electron found in the ground state of a Scandium atom?
How many atomsof carbon are present in 34.5 grams of caffeine?
Determine the percent yield for the reaction and also find out at which point the total pressure = 188 torr.
A sample of ethanol (C2H5OH) has a mass of 45.0 g. How many carbon atoms does the sample contain?
A solution of 100 mL of 0.2 M NH3 is titrated with 50 mL of 0.5 M HNO3. What is the pH of the resulting solution? Kb for NH3 is 1.8 × 10-5.
A mixture of acetaldehyde CH3CHO and propanal C2H5CHO under basic conditions
Given the balanced equation: C2H4 + 3O2 → 2CO2 + 2H2O How many liters of CO2 are produced when 15 liters of O2 are consumed?
How much water must be added to 534. mL of 0.180 M HCl to produce a 0.135 M solution? (Assume that the volumes are additive.)
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