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An empty 100-mL measuring cylinder weighs 132.456 g. When filled with rice to the 100-mL mark it weighs 220.345 g. After water has been added to fill the spaces between the grains, the weight is 250.123 g. What is the density of the rice in g mL-1?
Determine the magnitude of the partial charges in HBr given that the bond length is 1.41 angstroms and the dipole moment is 0.82 debye.
What were the key milestones in the historical evolution of semiconductor manufacturing? How did the evolution of semiconductor process technology interact with and impact the development of manufacturing technology?
Express the rate of the following reaction equation in terms of the rate of concentration change for each of the three species involved: 2NOCl (g) = 2NO (g) +Cl2 (g)
if you had 21 moles of oxygen and 8 moles of ethane, what is the most moles of carbon dioxide possible?
At a given temperture, of the following reaction has a Keq equal to 25. If 0.100 mol of both SO3 and NO were placed into a 1.00 L container, what would be concentration of SO3 at equilibrium?
If 3.25ml of vinegar needs 40.0 of 0.130M NaOh to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.30qt sample of this vinegar.
The atomic weight of a newly discovered element is 98.225 amu. It has two naturally occuring isotopes. One isotope has a mass of 96.780 amu.
Hydrochloric acid reacts with aluminum to form aluminum chloride and gseous hydrogen. What's the mass of aluminum required to produce 1.0kg of aluminum chloride if there is excess acid?
At 25oC, the vapor pressure of the cyclohexane liquid "C6H12" is 70.0 mmHg and that of the toluene liquid "C7H5CH3" is 22.0 mmHg. The mole fraction of toluene in an ideal solution of cyclohexane and toluene that has a vapor pressure equals to 53.2..
A sample of naphthalene, which should be pure white, was found to have a grayish color after the usual purification procedure. The melting point was correct, and the melting point range was small. Explain the gray color.
the following reaction takes place in a sealed 40 l container at a temperature of 120 degrees celsius. 4nh3g 5o2g 4nog
modern seawater is 0% while the average value of the polar ice cap is -45%. The ice cap holds 2wt% of the oceanic water. Calculate the delta 18 O value of an ice-free ocean.
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