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What is the usefulness of the addition of an internal retention time standard that elutes near the end of the chromatogram
How many equivalent Lewis structures are necessary to describe the bonding in NO2F ?
A hydrogen-filled balloon was ignited and 2.00 gram of hyrdogen reacted with 16.0 g of oxygen. How many grams of water vapor were formed?
A sample of oxygen gas is collected over water at 25 degrees C and a total pressure of 637 torr. The volume of the gas collected is 500.0 mL. What mass of oxygen is collected? The vapor pressure of water at 25 degress C is 23.8 torr.
At atmospheric sample is composed of nitrogen, oxygen, argon, water vapor, and trace other gases. If the partial pressure of nitrogen is 577 mmHg, oxygen is 148 mmHg, water vapor is 20 mmHg and argon is 7 mmHg, what is the observed barometric pres..
At 0.0oC, if the volume of air is 3.4 mL and the pressure of the atmosphere that day is 695 mmHg, what is the number of moles of air?
Sodium ethoxide, NaOCH2CH3, contains both covalent and ionic bonds,
which gives the order for first ionization energies smallest to largest
Suppose that the microwave radiation has a wavelength of 12.7 cm. How many photons are required to heat 200. mL of coffee from 25°C to 62°C?
If 5.50 mol calcium carbide reacts with an excess of water, how many moles of acetylene will be produced.
A bomb calorimeter whose components have a heat capacity of 6.66 kJ/°C is filled with 913 g of water. (The amount of water is not constant from experiment to experiment.
Exactly one-half of the magnesium ions are Mg-28, a beta emitter with a half-life of 21 hours. What is the decay rate of Mg-28 in the solution after 5.50 days? (Assume a density of 1.02 g/mL for the solution)
If you have 200.0 mL of a 30.0% aqueous solution of isopropyl alcohol, what volume of water is in the solution?
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