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What ions and/or molecules are present in relatively large proportions in a solution of a strong acid HI (aq)?
Write thermochemical equations for the decomposition of one mole of sodium fluoride into the elements in their stable states at 25 degrees celcius at 1 atm.
A solution of 2.40 grams of the unknown hydrocarbon dissolved in 26.7 grams of naphthalene is found to freeze initialy at 76.2 Degree Celsius. Caluculate the apparent milar mass of the unknown hydrocarbon on the basis of the freezing-point depress..
Determine the percent by mass of calcium carbonate in the sample
Calculate the amount of heat required to heat a 3.8kg gold bar from 27 degree celsius to 63 degree celsius.
Calculate the mass of urea that should be dissolved in 201 g of water at 35°C to produce a solution with a vapor pressure of 37.1 mmHg.
If 8.88 X 10^7 aluminum atoms can fit along a 1.00 inch line, what is the diameter of a single aluminum atom?
A solution of ammonia and water contains 4.50×1025 water molecules and 5.30×1024 ammonia molecules. How many total hydrogen atoms are in this solution?
The atomic weight of a newly discovered el- ement is 110.352 amu. It has two naturally occuring isotopes. One has a mass of 111.624 amu.
What mass of calcium can be produced by this process if a current of 5900 A is applied for 55 h? Assume that the electrolytic cell is 60 % efficient.
find the methylmercury CH3Hg concentration in fish at which regular consuption at 50g/day becomes unacceptable health risk. use epa reference dose for methylmercury
What are some of the considerations for the optimal chain length in glycogen? a) Optimal chain length is a compromise between number of available ends, and the need for debranching enzyme
The atomic orbitals of two iodine atoms combine to form the diatomic molecule. Use the periodic table to determine the atomic orbitals that overlap to form the molecule and the symbol of the noble gas that has the same electron configuration as th..
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