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Consider a piece of gold jewelry that weighs 9.25 and has a volume of 0.675 . The jewelry contains only gold and silver, which have densities of 19.3 and 10.5 , respectively. If the total volume of the jewelry is the sum of the volumes of the gold and silver that it contains, calculate the percentage of gold (by mass) in the jewelry.
Draw the Fischer projection of the enantiomer of (4S, 5S)-5-sec-butyl-4-(1,1-difluoromethyl)nonane
Standard Atmos. Pressure is 90.0 atm. What are the Partial Pressures of the Gases in mmHg?
Calculate the molar mass of the uknown compound. The boiling point elevation constant for water is0.52°C/m
How many molecules of ethanol C2H5OH are present in 135 g of ethanol? The density of ethanol is 0.789 g/cm3?
Write the overall reaction, showing how much ATP (Adenosine tri phosphate) can be produced per pentose used also write an equation for the generation of NADPH using ribose as a sole source of carbon?
How many air molecules are in a 10.0x20.0x10.0 ft room? Assume atmospheric pressure of 1.00atm , a room temperature of 20.0C , and ideal behavior.
A patient needs 0.004g of a sulfa drug. There are 5.00mg tablets in stock. How many tablets should be given.
if 0.80 g of sulfur dioxide at 10.00 atm pressure (pi) dissolves in 5.00 l of water at 25.0 degress celcius how much will sulphur dioxide dissolve in 1 l of water at 9.00 atm pressure (p2) and the same temperature?
The concentration of Mg2+ in a sample of water is 262 mmol/L At what pH will 99% of the Mg2+ be precipitated as Mg(OH)2? Ksp = 8.9 x 10-12
A form of the polypetide hormone angiotensin II has the amino acid composition ( ASP, ARG, ILE, MET, PHE, PRO, TYR, VAL). The following observations are made
Describe the major absorption bands in the IR spectrum - indicate the bonds responsible for those peaks which prove you have synthesized isopentyl acetate and that it is an ester.
The atmospheric sulfur dioxide concentration over a certain region is 0.12 ppm by volume. Calculate the pH of the rainwater due to this pollutant. Assume the dissolution of SO2 does not affect its pressure.
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