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Complete combustion of 4.80 g of a hydrocarbon produced 14.7 g of CO2 and 7.02 g of H2O. What is the empirical formula for the hydrocarbon?
In an experiment, 5.00 L of N2 is saturated with water vapor at 22°C and then compressed to half its volume at constant T. (a) What is the partial pressure of H2O in the compressed gas mixture?
The air in an inflated balloon (defined as the system) is warmed over a toaster and absorbs 130J of heat. As it expands, it does 76kJ of work. What is the change in internal energy for the system?
Identify the two important classes of catalysts. Analyze the chemical reactions that take place when a biological catalyst combines with a reactant (substrate) to form an unstable intermediate.
We have noted that water level rises to 62.4mL when a piece of metal of 48 grams is dropped into 50.0mL of H 2 O in a graduated cylinder. Determine the density of this metal?
A 93 gram solution of silver nitrate contains 16 grams of AgNO3. What is the percent by mass of silver nitrate in this solution?
The first ionization energy of bismuth is Ei1 = +703 kJ / mol. What is the longest possible wavelength of light that could ionize an atom of bismuth?
Calculate the concentration of solution containing one mole of phophate per litre
What is the second step in the scientific method? 1-to analyze the data, and create a theory to confirm the experimental observations 2- to analyze the data, and propose a tentative hypothesis to explain the experimental observations.
A gas occupies a volume of 410 mL at 27oC and 740 mm Hg pressure. Calculate the volume the gas would occupy at STP.
Write the electronic configuration in sublevels for the following atoms
If 28.0 mL of .150 M HCL is needed to neutralize all the NH3 from a 2.25-g sample of organic material, calculate the mass percentage of nitrogen in the sample.
What volume of pure oxygen gas (O2) measured at 546 K and 1.00 atm is formed by complete dissociation of 0.7 mol of Ag2O? 2 Ag2O(s) → 4 Ag(s) + O2(g)
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