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You have discovered a new element with an atomic weight of 260 g/mol and a density of 30 g/cm3. If the atoms pack on a BCC lattice what is the hard sphere atomic radius R (in nm)?
moles of benzoyl peroxide and another person used the same amount of benzoyl peroxide as the first person but only used 150 moles of styrene, what would be the average molecular weight of each groups polymer sample be?
What is the geometry and hybridization of the carbonyl carbon in carboxylic acids and their derivatives.
When (S)-2-bromobutane undergoes an S2N reaction with CH3O-, the product is the compound shown below. What is/are the configuration of the product(s) obtained from this reaction
Arsenic acid (H3AsO4) is a triprotic acid with Ka1 = 5. 10-3, Ka2 = 8. 10-8, and Ka3 = 6. 10-10. Calculate [H + ], [OH ? ], [H3AsO4], [H2AsO4? ], [HAsO42- ], and [AsO43- ] in a 0.62 M arsenic acid solution.
The heat of vaporization of CCl2F2 is 289 J/g. What mass of this substance must evaporate to freeze 165 g of water initially at 15°C? (The heat of fusion of water is 334 J/g; the specific heat of water is 4.18 J/g-K.)
If 18.6 of 0.800 solution are needed to neutralize 5.00 of a household ammonia solution, what is the molar concentration of the ammonia?
Iron has a body-centered cubic unit cell, and a density of 7.87 g/cm3. Calculate the edge length of the unit cell, in pm. (The atomic mass of iron is 55.85 amu. Also, 1 amu = 1.661 × 10-24g.)
A chemist wants to make 6.5 L of a 0.270 M solution. What mass in grams should the chemist use?
Write a complete set of quantum numbers for the fifth electron added to a hydrogen ion. (ie, the fifth electron in any electron configuration). N= l= ml= ms=
For many years drinking water has been cooled in hot climates by evaporating it from the surfaces of canvas bags or porous clay pots. How many grams of water can be cooled from 39°C
Calculate kinetic energy of a 2 ton truck lumbering along at 60 mi/hr.
Physiological saline solutions used for intravenous injections have a concentration of 0.90% NaCl by weight
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