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The mass of a cube of iron is 363 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
An unknown gas has been determined to have the empirical formula CH2. At 27°C and 0.966 atm, the gas has a density of 1.65 g/L. What is the molecular formula of this gas
What mass of Aluminum is produced when 0.5 mole of Al2S3 is completely reduced with excess H2?
Concentrations of Components in an Equilibrium, The following equilibrium process at 686 deg. C. CO2(g) + H2(g) f/r CO(g) + H20 (g)
At 1 atm, how much energy (kJ) is required to heat 65.0 g of H2O(s) at -20.0 degrees C to H2O(g) at 135.0 degrees C?
How many photons are required to heat 255 mL of coffee from 25 degrees celcius to 62 degrees celcius?
Calculate the molarity of each of the following solutions. (a) 23.0 g of ethanol (C2H5OH) in 545 mL of solution (b) 15.4 g of sucrose (C12H22O11) in 74.0 mL of solution
3.5 g of a hydrocarbon fuel is burned in a vessel that contains 250. grams of water initially at 25.00 C. After the combustion, the temperature of the water is 26.55 C.
A balloon 15m in diameter is inflated with helium at 20 degrees Celsius. How much work is done during inflation against an external pressure 1atm.
The latent heat of fusion for sodium is 2.6kJ/mol. How much heat is needed to melt 46g of sodium at its melting point of 98 degree Celcius?
An aqueous solution is 22.0% by mass silver nitrate, AgNO3, and has a density of 1.22 g/mL. What is the molarity of silver nitrate in the solution?
At atmospheric sample is composed of nitrogen, oxygen, argon, water vapor, and trace other gases. If the partial pressure of nitrogen is 577 mmHg, oxygen is 148 mmHg, water vapor is 20 mmHg and argon is 7 mmHg, what is the observed barometric pres..
Rate Law for Proposed Mechanism, Consider the reaction 2NO(g) + O2 ---> 2NO2 (g). The following mechanism has been proposed to explain the experimental rate law
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