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Suppose that 1.00 of rubbing alcohol evaporates from a 55.0 aluminum block. If the aluminum block is initially at 25, what is the final temperature of the block after the evaporation of the alcohol? Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25.
What pressure is exerted by 0.625-mole of a gas in a 45.4-L container at -24.0°C?
Helium is compressed isothermally and reversibly at 100 celcius from a pressure of 2 to 10 bar
C2H4 + 3O2 = 2CO2 + 2H2O if 6.0 mol of co2 are produced, how many moles of o2 were reacted.
Zinc is extracted from its ore by heating with carbon in the blast furnace. How much zinc oxide do you need to make 130 g of zinc?
a hydrate of calcuim chloride contains 49.3% water and has a formula weight of 219g/mol calculate the molecular formula of the hydrate
calculate mass of KHC8H4O4 (molar mass = 204.44 g/mol) that reacts with 15 ml of the NaOH solution
Compute the activation energy for this reaction when The half-lives were found to be 161 min at 199 Celsius and 12.5 min at 230 celsius? The isomerization of methyl isocynide follows first order kinetics.
Water supply in a city is fluoridated by adding NaF. The preferred concentration of F- is 1.6ppm.calculate the amount of Naf in milligrams should be added per gallon (treated water) if the water supply is 0.2 ppm in F-?
The biochemical oxygen demand (BOD) is the capacity of organic and biological matter in natural water to consume oxygen. It is determined experimentally by measuring the oxygen concentration in a sealed sample before and after a 5-day incubation p..
An 85.0g sample of iron requires 954 J of heat to raise its temperature 25.0C. What is the specific heat of the iron?
A student combusts 504.96 grams of ethene gas, C2H4. How many liters of CO2 (g) are produced at a pressure of 0.993 atm and a temperature of 295 K? C2H4 (g) + 3 O2 (g) ->2 CO2 (g) + 2 H2O (g)
A gaseous mixture of rm O_2 and rm N_2 contains 36.8 % nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 485 mmHg.
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