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Based on electronegativity differences, what do you think is the identity of the polyatomic anion? NaAlH4
The molecular mass of an unknown compound was determined by measuring the freezing point depression of an aqueous solution of the compound
Arrange the following aqueous solutions in order of increasing freezing points
Use the data in the simulation to find the concentration of hydroxide, \rm OH^-, ions in a 0.100 M solution of \rm HOAc , acetic acid.
The air is cooled as the water evaporates. How much water must be evaporated to cool the air in a room of dimensions 4.0 m x 5.0 m x 3.0 m by 20. C? Assume that the enthalpy of vaporization of water is the same as it is at 25 c.
The two occuring isotopes of gallium-69 and gallium-71,which are found in the ratio of 3:2. Determine the atomic mass of gallium.
Draw the Lewis structure for SO42- and determine the formal charge on all 5 atoms in this polyatomic anion.
If the instantaneous initial rate of reaction is 0.000145 M/s, calculate the initial instantaneous rate of change of H2 concentration. In addition, explain the answer using words.
calculate the molar mass of naphthalene, the organic compound in "mothballs," if a solution prepared by dissolving 5.00g of naphthalene in exactly 100g of benzene has a freezing point 2.00 degrees celcius below that of pure benzene.
nitrogen and hydrogen gases react to form ammonia gas as followsn2g3h2g--gt2nh3gat a certain temperature and pressure
A reaction has the stoichiometry A + B + C ? P. The concentration of P one minute after mixing the reactants is measured for various initial concentrations of reactants
a design secures to parts with a line of hex-head bolts whose heads have a 12 distance across the flats i.e. take a
what is the density of a block of marble that occupies 306 cm3 and has a mass of 804 g? answer in units of g/cm3.
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