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A 100 mm diameter silicon wafer is oxidized completely. What is the thickness of the resulting SiO2 wafer? The molecular weight of Si is 28 g/mol.
What is the concentration of N2 gas at equilibrium when the concentration of NO2 is twice the concentration of O2 gas?
A sample consisting of 2.00 mol of ideal gas molecules, for whichCV,m =(5/2)R, initially at p1 =111 kPa and T1 =277 K, is heated reversibly to 356 K at constant volume. Calculate t
If a solution containing 17.76 g of mercury(II) perchlorate is allowed to react completely with a solution containing 5.102 g of sodium sulfate, how many grams of solid precipitate will be formed?
A student studied the clock reaction described in this experiment. Find the concentration of each reactant in the mixture.
If 125 of fluorine-18 is shipped at 8:00 a.m., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 p.m.
These spectra have been observed and recorded. Explain in terms of electron energy states and energy changes, how hydrogen's bright line spectrum is produced.
Copper(II) sulfate react to form as much product as possible, how many millimoles (mmol) of the non-limiting reactant will remain unused at the end of the reaction?
Earth's atmosphere contains many volatile substances that are present in trace amounts. The following quantities of these trace gases were found in a 1.0 gallon sample of air. Calculate number of mo
What volume of N2O, collected over water, at a total pressure of 94kpa and 22 Celcius, can be produced from 2.6g of NH4NO3?
When analyzing the iron content of a well drilled for use in a new housing development. Calculate the pooled estimate of the standard deviation of the analysis.
Chlorine consists of two major isotopes with the following atomic masses: 35Cl (34.9689 amu) and 37Cl (36.9659 amu). The average atomic mass of chlorine is 35.4527 amu. Calculate the percent of eac
The white precipitate is AgCl(s) and the clear, colorless liquid consists of Na+(aq), NO3-(aq), and H2O(l). Identify the chemical components in Solutions A and B.
The Henry's law constant for O2 in water at 25 °C is 1.66 ´ 10-6 M/mm Hg. What partial pressure of O2 is necessary to achieve an equilibrium concentration of 0.150 M O2?
An organic substance has an enthalpy of vaporization of 29.0 kJ/mol. The compound has a vapor pressure of 524 mm Hg at 25 °C. At what temperature is the vapor pressure equal to 115 mm Hg?
HF(aq), and hydrocholoric acid, HCl (aq), are found in the lab. When tested, they both have a pH of 1. Which acid is more concentrated, HF or HCl?
What is the dominant intermolecular force or bond that must be overcome in converting CO2 from a liquid to a gas?
What is the mole fraction of 1.98 m Fe(NO3)3(aq)? The molar mass of Fe(NO3)3 is 241.9 g/mol and the molar mass of water is 18.02 g/mol.
A white solid precipitate forms. What happens to the mass of the mixture after the solid precipitate forms? Choose the best answer.
What is the mole fraction of MgCl2 in a solution that is 11.04% by mass MgCl2(aq)? The molar mass of MgCl2 is 95.21 g/mol.
The dry solid weighs 0.397 g. Use this mass and dillution volumes to calculate the actual molarity of the sulfuric acid in the initial solution
The specific heat capacity of silver is 0.235 J/g K. Its melting point is 962 C and its enthalpy of fusion is 11.3 kJ/mol. What quantity of heat in joules is required to change 5.00 g of silver from
A 2.52- sample of a compound containing only carbon, hydrogen, nitrogen, oxygen, and sulfur was burned in excess to yield 4.36 of and 0.892. Calculate the empirical formula of the compound.
What mass of NaCl must be dissolved in 65.0 grams of water to lower the freezing point by 7.50 °C? The freezing point depression constant, Kfp, for water is -1.86 °C/m.
Calculate the wall shear rate, which is defined as rw = Tw/mu, for each case. What is shear rate at the center line of each these blood vessels?