What percentage of the spheres are copper
A box contains a mixture of small copper spheres and small lead spheres. The total volume of both metals is measured by the displacement of water to be 427cm^3 and the total mass is 4.36 kg . What percentage of the spheres are copper?
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Ethanol (C2H5OH) melts at -114°C. The enthalpy of fusion is 5.02 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g·K and 2.3 J/g·K, respectively. How much heat (kJ) is needed to convert 25.0 g of solid ethanol at -135°C t
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The total volume of both metals is measured by the displacement of water to be 427cm^3 and the total mass is 4.36 kg . What percentage of the spheres are copper?
A 0.573g sample of nonvolatile solute is added to 15.6g of naphthalene and the mixture warmed until melted. The freezing point of the solute was determined and the found equal to 78.1 degress celsius.
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Reaction of NO with chlorine to yield NOCl is pseudo-first order if NO is present in a large excess. Determine the rate constant of this reaction if the partial pressure of NOCl increased from 0 to 100 Pa in 522 s staring with the initial pressure
A solution containing 16.9 of a nonvolatile molecular compound in 250 g water has a freezing point of -0.744...What is the molar mass of the substance?
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