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A concrete footing measures 3.0 ft by 3.0 ft by 2.0 ft. If the density of the concrete is 3.0 g/cm3, then what is the mass of the footing in kilograms?
Depict all forms of histidine at pH 6.5 present at a level of at least 10% of the total possible forms.
Based on the following definitions of stereospecifc and stereoselective, propose a reaction that is stereospecific but NOT stereoselective
Determining the free ions of calcium on a similar sample of blood. recommend if the sample requires pretreatment or if it can be calculated directly In each case.
Potassium-40 has a natural abundance of 0.0118%. Explain how many atoms of potassium-40 are present in a 1.35 g sample of KCl
1). Determine the number of moles of gas contained in a 1.25 L container at 25 degrees Celsius and 800 torr?
a) What must be the velocity of electrons if their associated wavelength is to equal the longest wavelength line in the Lyman series
A 2.6 liter container of nitrogen had a pressure of 3.2 atm. What volume will the gas occupy at a pressure of 1.5 atm?
Hydrogen exhibits several series of line spectra in different spectral regions. For example the Lyman series (nf = 1 in Balmer-Rydberg equation) occurs in the ultraviolet region while the Balmer (nf = 2) series occurs in the visible range
What are the concentrations of Cu2+, NH3, and Cu(NO3)4 2+ at equilibrium when 18.8 g of Cu(NO3)2 is added to 1.0 L of a .800 M solution of aqueous ammonia? Assume that the reaction goes to completion and forms Cu(NH3)4 2+.
The primary volume was 3.00 L as well as the initial pressure of chlorine was 1.45atm. The piston was pushed down to change the volume to 1.00 L. Compute the final pressure of the gas if the temperature and number of moles of chlorine remain const..
Draw the structures of the products of the neutralization reaction between pyridine and propanoic acid. Include lone pairs on the appropriate atoms.
A racquetball court is 20 ft wide. If we consider only motion along this direction and treat the ball as a particle in a box, if the ball weighs 1.4 ounces, what quantum number corresponds to a racquetball hit 100 km per hour and what speed would ..
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