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A solid aluminum sphere has a mass of 85 g. Use the density of aluminum (2.7 g/cm3) to determine the radius of the aluminum sphere in inches. Offer only numerical value (no units).
If 19.0 mL of 0.800 M HCl solution are needed to neutralize 5.00 rm mL of a household ammonia solution, what is the molar concentration of the ammonia?
question two materials a and b are tested and a stress-strain curve is plotted. material b has a yield stress of 200
The pH of a bicarbonate-carbonic acid buffer is 8.00. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-).
A toothpaste contains .24% sodium fluoride by mass that is used to prevent dental caries and .30% triclosan. toothpaste net mass is 119 grams. Calculate the number of moles of sodium fluoride
The electronic absorption band of a compound in solution had a Gaussian lineshape and a half-width at half-height of 4233 cm-1 and εmax = 1.54 x 104 dm3 mol-1 cm-1. Estimate the integrated absorption coefficient.
Calculate the change in energy required in making 70.0 mL of water from its elements under standard conditions
How many valence electrons are in a Kr atom?
a food chemist combusts 56g of a chocolate bar in a calorimeter containing 1.5 l of water density water 1g1ml. the
helium atoms do not combine to form He2 molecules, yet He atoms do attract one another weakly through? (a). dipole-dipole forces
the turbines in a hydroelectric plant are fed by water falling from a 50-m height. assuming 91 efficiency for
An aqueous solution is prepared from 40.0 g of lithium fluoride "LiF" (a nonvolatile ionizable electrolyte) in 200.0 g of water. Given Kb water = 0.52oC/m and the van't Hoff factor of this lithium fluoride solution = 1.20, the boiling point elevat..
Hydrogen cyanide, HCN, is a poisonous gas. The lethal dose is approximately 300 mg HCN per kilogram of air when inhaled.
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