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Dry air is bubbled through 25 litres of water at a rate of 15 litres (STP)/min. The air leaving the liquid is saturated with water at 25 degrees celcius and 1.5 atm. How long it will take for all of the water to vaporize.
A perfect gas undergoes an expansion process at constant pressure. Does its internal energy increase, decrease, or stay the same. Why
Fill in the lines for the orbital/arrow diagram for the valence electrons of the Dyprosium atom, including labeling the n, l and ml values and the individual orbitals that are known
how would you prepare pentanenitrile from butanoic acid? show the reaction steps indicating the appropriate reagents
Assume that you pipet twenty milliliters of 0.350 M CaCl2 into a fifty milliliter volumetric flask and add DI water to the calibration mark. What is the molarity of this diluted solution
Consider the reaction at 25C 2NO2 --> 2NO + O2 The overall rxn rate = k[NO2]2. The rate constant, k = 1.4 × 10^10 M-1 s-1. If 3.8 moles of NO2 are initially present in a sealed 1.00 liter vessel at 25 C, what is the half-life of the reaction
Using triethylamine with alkyl halides such as iodoethane, 1-bromopropane, 2-bromopropane, describe how steric hindrance affects the rate of an Sn2 reactions. Use specific chemical examples to support the conclusion
A sample containing 0.35 mol argon gas at a temperature of 13 C and a pressure of 568 torr is heated to 56 C and a pressure of 897 torr. A. What is the original volume of the gas? B. What is the new volume of the argon gas?
Calculate the total volume of gas (at 133 degrees C and 758 mmHg) produced by the complete decomposition of 1.56 kg of ammonium nitrate.
Find the amount of heat involved when 300.4 g of propane is burned with an excess of oxygen. C3H8(g) + 3 O2(g) ? 3 CO2(g) + 4 H2O(l) -->?H = -2219 kJ
How much energy (in calories) is needed to heat 12cm^3 of fat from room temperature (25C ) to its melting point (35C)? Specific heat of fat 0.45 cal/(g*C, and the density of fat is .94g/cm^3)
Gallium-68 decays by positron emission, with a half-life of 68.3 min. How much 68Ga remains from a 10.0 mg sample after 683 min
The radius of a tungsten atom is 137 pm. How many tungsten atoms would have to be laid side by side to span a distance of 3.90 mm
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