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At a distance of 42 ft, an ionizing radiation source delivers 3.5 rem of radiation. How close could you get to the source and still have no biological effects?
Pressure is gradually decreased from 87.7mL to 42.6mL. What is the final pressure of ammonia if there is no change in pressure?
Showing only Valence electrons, write an equation for the reaction that occurs between sodium, Na
Calculate the work, heat, energy and enthalpy change upon: a) expansion by 3.3 L at p=const (isobaric). b) isothermal expansion by 3.3. L against a constant external pressure of 30.0 kPa c) reversible isothermal expansion by 3.3 L.
The complete combustion of pentane releases 243 kj on the basis of this information calculate the value of delta H for the complete combustion of one mole of pentane
The temperature of the calorimeter increases from 24.56 *C to 32.01 *C. What is the heat of combustion per gram of quinone and per mole of quinone?
A sample of gas occupies a volume of 364 mL at 1.28 atm and 27 oC. Calculate the volume of the gas if its temperature is changed to 57.0 oC while its pressure is held constant.
Draw a six carbon alkyne that can exist as diastereomers. The molecule should only contain only carbon
What is the molarity of a sulfuric acid solution if 40.2 mL of this solution is required to titrate 6.50 grams of sodium hydrogen carbonate?
One method used to store energy during times of low demand is by pumping water uphill into a reservoir. When energy demand exceeds the output produced by power plants, the water is released, moves downhill, and is converted into electricity by a t..
Complete combustion of 3.90 g of a hydrocarbon produced 12.0 g of CO2 and 5.54 g of H2O. What is the empirical formula for the hydrocarbon?
Determine the final concentration if a 144-mL portion of that solution is diluted using water of 143 mL ?
The air pressure in the tires of an automobile is adjusted to 37 psi in SanDiego, where the air temp is 68F. The air in the tires is at the same temp as the atmosphere
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