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A 0.2060-g sample of impure Ca(OH)2 is dissolved in enough water to make 62.50 mL of solution. 20.00 mL of the resulting solution is then titrated with 0.1937-M HCl. What is the percent purity of the calcium hydroxide if the titration requires 7.81 mL of the acid to reach the endpoint?
The specific internal energy of helium at 300k and 1 atm pressure is 3800j/mol and the specific molar volumeat thesame temp. and pressure is 24.63l/mol.
How much heat energy, in kilojoules, is required to convert 61.0 g of ice at -18.0 C to water at 25.0 C ?
How much heat is required to warm 1.20 kg of sand from 26.0 0C to 100.0 0C?
100 mol/h of n-octane is burned in 80.0% excess air to 95.0% conversion. What is the molar flow rate of N2 in the stack gas if The n-octane is converted to a mixture carbon monoxide, carbon dioxide, and water, where the ratio of CO2 to CO is 4:1?
If the volume of ocean water is 5.4*10^20 contains 4.1 percent sodium chloride ("salt") by mass and the density of the water is 1.86 g/mL.
What unusual aspect of water is responsible for it unique characteristics as both a liquid and as a solid? Give examples of how this property of water would affect food systems during processing.
Suppose in universe Xacto matter is composed of protons, neutrons, and special matter X. For elements in a, design and draw a new periodic table that makes sense for this parallel universe.
Determine the number of ammonia molecules in 4.85g of ammonia (NA= 6.022 x 1023 mol-1).
A gas expands and does pv work on its surroundings equal to 347 J. At the same time, it absorbs 127J of heat from the surroundings, what is the change in energy of the gas.
How much energy (in kilojoules) is required to convert 110 mL of diethyl ether at its boiling point from liquid to vapor if its density is 0.7138 ?
A 4.50-g sample of LiCl at 25.0C dissovles in 25.0mL of water also at 25.0C. Th final equilibrium temerpature of the resulting solution is 60.8C
Determine the new temperature and express your answer in degrees celsius,?
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