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A compound is 40.0%C, 6.70%H, and 53.3%O by mass. Assume that we have a 100.g sample of this compound. What are the subscripts in the empirical formula of this compound?
What molarity of aqueous magnesium chloride solution can be expected to show the same conductivity
A 25.0 g sample of pure iron at 85.0°C is dropped into 75 g of water at 40.0°C. What is the final temperature of water-iron mixture?
A sample of air contains 11.4 µg/m^3 of beryllium dust. How many atoms of beryllium are present in a room with dimensions of 19.1 feet by 12 feet by 13.3 feet? Answer in units of atoms.
A sample of an unknown gas effuses in 12.4 min. An equal volume of H2 in the same apparatus at the same temperature and pressure effuses in 2.59 min.
What is the final temperature when 125 g of iron at 92.3 °C is dropped into 50.0 g of water at 27.7 °C? The specific heat of iron is 0.444 J g-1 °C-1 and the specific heat of water is 4.184 J g-1 °C-1.
What is the minimum number of liters of air that must pass over a sample of the compound at 25oC to vaporize 1.0 mg of it? Hint: You know the Vapor Pressure from question "a" above and you are given the temperature and mass.
A system absorbs 192 kj of heat and the surroundings do 110 kj of work on the system. what is the change in internal energy of the system.
The normal boiling point of methanol is 64.7°C. A solution containing a nonvolatile solute dissolved in methanol has a vapor pressure of 710.0 torr at 64.7°C. What is the mole fraction of methanol in this solution?
A solution is prepared by dissolving 294 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.
Draw a three-dimensional structure of CH3CL. Include all non-bonding pairs in your drawing. Shoe the direction of the molecular dipole and indicate bond angles.
Determine why the 2s and 2p orbitals on Hydrogen are degenerate and they are not in the case of Lithium and calculate Kp at 5 degrees and enter your answer in scientific notation if delta H rxn= -128 kj/mol CH 3 OH,?
When the sodium atom becomes a sodium ion, how does the size and electron configuration of the sodium atom change?
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