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An unknown compound contains only C, H, and O. Combustion of 3.60 g of this compound produced 8.18 g of CO2 and 3.35 g of H2O.
What is the empirical formula of the unknown compound. Use subscripts if needed.
In the dehydration of methylcyclohexanols, would it be advantageous to relux the reaction mixture instead of performing a distillation?
Describe the characteristic infrared absorption frequencies that would allow you to distinguish between the following pairs of compounds.
What is the density(in gm/ml) of a 3.60 M aqueous sulphuric acid solution that is 29%
A Be3+ ion emitts a photon with a frequency of 4.68 × 1016 Hz. If the energy of the initial state of the Be3+ ion was -3.88 × 10(-18) J, calculate the energy of the final state. Express answer in scientific notation.
What NaCl concentration results when 299 mL of a 0.820 M NaCl solution is mixed with 407 mL of a 0.450 M NaCl solution? When heated, KClO3 decomposes into KCl and O2
What mass of helium gas is needed to pressurize a 112.0 L tank to 262 atm at 25°C?
what would the final common temp be assuming no heat loss? Use Cp for ethanol = 60.0 J K -1 mol -1 and Cp for Copper = 0.380 J K -1 g -1.
A solution is prepared by mixing 0.3355 mol of NaNO3 (84.995 g mol-1) with 235.0 g of water (18.015 g mol-1). Its density is 1.0733 g mL-1. What is the molality of the solution?
If more NH4HS is added to a flask in which this equilibrium exists, how is the equilibrium affected? What is some additional NH3 is placed in the flask? What will happen to the pressure of NH3 if some H2S is removed from the flask?
The boiling temperature is found to be 157 C(760 torr) as the first small amount of distillate is collected. The standard vapor pressures of n-propylcyclohexane and n-propylbenezene are known to be 769 toor and 725 torr
Knowing the pH and the value of [H4SiO4(aq)], what is the value of [H3SiO4-(aq)] when the pH=7.0? and when pH=10.0?
Combustion of a 0.1000 g sample of a compound containing only carbon, hydrogen, and oxygen in excess yields 0.1953 g CO2, and 0.1000 g H2O. A separate experiment shows that the molar mass is 90 Daltons. Calculate the mass percent composition.
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