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Estimate the relative density (compared to pure copper) of coinage cupronickel, an alloy in which 25% of the copper atoms have been replaced by nickel atoms without distortion of the crystal structure.
Identify the acid or base behavior of each substance in these reactions and what happens to the hydroxide ion concentration if you decrease the hydronium ion concentration?
The first dissociation constant for carbonic acid (H2CO3) is K1 = 4.45e-7. Assume all activity coefficients are equal to 1.0. What is the concentration of carbonic acid in a) moles/liter, b) mg/l as H2CO3, and c) mg/l as CaCO3
steam enters the condenser a heat exchanger of a power plant at 73 kgs 20 kpa and a quality of 85. it exits as
Calculate the specific heat of the metal. (The specific heat of water is 4.184 J/g*C).
a 200-g sample of a metal absorbs 500 J, and its temperature rises by 30 degrees celsius. what is the specific heat of the metal?
a solution of 22.0g cacl2 in 100.0 cm3 of water has a vapor pressure of 22.8 torr at 26 celsius. why does this result
An Nd:YAG laser emits photons at 1064 nm in a pulse of 5.0 ns duration with a total energy of 300 mJ. What is the power (energy per time) associated with such a pulse. How many photons are emitted in such a pulse.
Determine how many grams of NaCl should be dissolved in a liter of H 2 O to produce an isotonic solution?
The thermal decomposition of 30.9g of CaCO3 produced 12.4g calcium and 3.71g carbon. Calculate the mass of oxygen produced in this reaction.
The latest techniques in microspectroscopy are capable of detecting fluorescent molecules in volumes limited only by the spatial resolution of the microscope, as small as (1μm)3 . if a 2 micromolar (2μM) solution is sampled by such a microscope
A 5% glucose solution has a specific gravity of 1.02. What is the mass of 500 ml of the glucose solution
The decomposition of phosphine, PH3, to P4 (g) and H2 (g) is first order. Its rate constant at a certain temperature is 1.1 min^-1. Calculate its half life.
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