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A student is synthesizing aspirin in a laboratory. Using the amount of limiting reactant, she calculated the mass of aspirin that should form 10.31g. When she weighed her aspirin product on the balance, its mass was 3.70g. Calculate the percent yield for this synthesis.
Calculate the molality of C2H5OH in a water solution that is prepared by mixing 50.0 mL of C2H5OH with 108.4 mL of H2O at 20°C. The density of the C2H5OH is 0.789 g/mL at 20°C. (Assume the density of water at this temperature is 1.00 g/mL.)
A mixture of water and graphite is heated to 600 K. When the system comes to equilibrium it contains 0.13 mol of H2, 0.13 mol CO, 0.43 mol of H2O and some graphite.
the concentration of silicon in an iron-silicon alloy is 0.55 wt. what is the concentration in kilograms of silicon per
when 157mg of dipentylamine was added to 122mg of benzoic acid and 2ml of water a completely homogenous solution was
CuO has the distorted PtS structure. Describe the arrangement of the copper and oxygen atoms
A reaction rate increases by a factor of 1000. in the presence of a catalyst at 25 C. The activation energy of the original pathway is 98 kJ mol-1. What is the activation energy of the new pathway, all other factors being equal
a coffee cup calorimeter containing 100ml of 0.30M HCl at 20.3degrees celcius. when 1.82g of Zn solid is added, the temperature rises to 30.5 degrees celcius. what is the heat of reaction per mole of Zn.
The thermal equilibrium temperature of the metal sample plus water mixture is 28.3 degree. What is the specific heat of the metal
The U.S. national ambient air quality standard for CO in a 1-hr period is 35 ppm. How many times greater than this standard is the CO concentration in cigarette smoke?
by referring to the figure determine the mass of each of the following salts required to form a saturated solution in
Explain which of the following species has the shortest, strongest covalent bond: CN^- , CO2 , C2^2- , CO^2- , CO
If 0.100 mole "recovered amine" had an [a]D=+20.35 degrees, how many moles of (-)- amine and how many moles of (+)-amine would there be in the sample
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