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Calculate the % copper in an ore that contains 25 % cu2so4
A conducting sphere of radius 10 cm has an unknown charge. If the electric field 20 cm from the centre of the sphere is 1.5 × 103 N/C and points radially inward
Determine the magnesium content (in ppm) of a 100.00 mL sample of drinking water if the following data were obtained. Titrant is 0.0551 M EDTA, 12.41 mL were used when an aliquot of the sample was at pH 13.0, 18.63 mL were used for an aliquot at p..
Calculating Kc, Given the amount of reactant in grams in a container at a temperature and amount produced in moles, calculate Kc:
One mole of a gas obeys van der waals equation of state that is allowable to expand isothermally from v1 to v2. Obtain an equation for the change in Helmholtz energy for such expansion.
A certain reaction has an activation energy of 63.62 kJ/mol. At what Kelvin temperature will the reaction proceed 4.50 times faster than it did at 347 K
An empty vial weights 31.45 g. If the vial weighs 179.56 g when filled with liquid mercury (d=13.53g/cm3), what is its volume
Which will experience the greater effective nuclear charge, the electrons in the n=3 shell in Ar or the n=3 shell in Kr. Which will be closer to the nucleus. Explain.
Draw a Lewis structure of BF that satisfies the octet rule for both atoms
Draw the Newman Structures for the most and least stable conformations of 2,2-dimethyl-3-fluoropentane along the C2-C3 bond.
2NH3(g)----N2(g) + 3H2 (g) at equilibrium, it was found that the concentrations were: .0584M for H2, .0195M for N2 and .430M for NH3. What was the initial concentration of ammonia
ammonia nh3 decomposes to hydrogen and nitrogen and 22.0 kcal mol of energy absorbed.2nh3g-------3h2g n2g delta heat
1.994 g sample of ethanol ch3ch2oh is combusted in a bomb calorimeter. the temperature of the calorimeter increases by
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