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What is the composition, in atom percent, of an alloy that consists of a) 90.5 wt% Ag and b) 9.5 wt% Cu? Assume that the atomic weights for silver and copper are, respectively, 107.87 and 63.55 g/mol. Round off your answers to 3 significant digits.
Assuming that a neutron star has the same density as a neutron, calculate the mass (in ) of a small piece of a neutron star the size of a spherical pebble with a radius of 0.14.
An ideal gas is expanded reversibly from initial conditions of Vi= 10 L and Ti = 25C to Vf= 100L and Tf= 150C calculate delta S
determine the empirical formula for each substance.1. a dead alkaline battery is found to contain a compund of mn and
How much heat is required to vaporize 55.0 of acetone at its boiling point? The heat of vaporization of acetone at its boiling point is 29.1.
Give the systematic names for the formulas, or the formulas for the names. (using the format copper(II) chloride for CuCl2, and using the format CO2 for CO2. Omit the centered dot for hydrates.)
Using the information on the mass of a proton, mass of an electron and the sizes of the nucleus and the atom, calculate the densities of a hydrogen nucleus and hydrogen atom.
For the gas phase decomposition of t-butyl alcohol, (CH3)3COH (CH3)2C=CH2 + H2O the rate constant at 811 K is 1.05E-3 /s and the rate constant at 846 K is 5.64E-3 /s. The activation energy for the gas phase decomposition of t-butyl alcohol is
the phosphorylation of 2 moles of ADP to ATP and has a deltaG= -135 kJ/mol. What is the deltaG for the conversion of glucose into lactic acid?
find the number of moles of water that can be formed if you have 218 moles of hydrogen gas and 104 moles of oxygen gas
the escape velocity necessary for objects to leave the gravitational field of the earth is 11.2kms-1. calculate the
The initial DO of the mix is 9.0 mg/L. After 5 days, the DO is 4.0 mg/L. After a long period of time, the DO is 2.0 mg/L, and it no longer seems to be dropping. Assume nitrification has been inhibited so the only BOD being measured is carbonaceous..
determine the specific heat of anbsp metal object of 19 grams that is heated to 96 degrees celsiusnbsp and added to a
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