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A 10.0cm long cylindrical glass tube, sealed at one end, is filled with ethanol. The mass of ethanol needed to fill the tube is found to be 11.48g . The density of ethanol is 0.789 g/mL.
A 2 mL solution containing 1.40 uCi/mL is injected into the blood stream of a patient. After dilution, a 1 mL sample is withdrawn and found to have an activity of 2.9 * 10-4uCi. Calculate the blood volume,
What is the change in internal energy (in J) of a system that absorbs 0.330 kJ of heat from its surrounding and has 0.586 kcal of work done on it in scientific notation.
A mixture of gases containing 21.0 g of N2, 106.5 g of Cl2, and 12.0 g of He at 14 oC is in a 50.0 L container. What is the partial pressure of N2?
A solution is made by mixing 500 mL of .121 M NaOH with 500 mL of .1 M CH3COOH. Calculate the equalibrium concentrations of H+. CH3COOH, CH3COO-, OH- and Na+
What is the purpose of a. the 0% T adjustment and b. the 100% T adjustment of a spectrophotometer
A volume of 275 mL of a solution of potassium hydroxide at 0.14 M is added to a sample of 3.00 x 102 mL of a solution of aluminium chloride at 0.11 M.
There are two stereoisomeric 1,3-cyclobutane carboxylic acids. one can form a cyclic anhydride, the other can not. draw the structures of theses compounds and indicate which one can be converted to a cyclic anhydride. explain
The bulb of the thermometer placed at the head of a distillation apparatus should be adjacent to the condenser. Explain the effects on the temperature recorded if the thermometer were placed (a) below the exit to the condenser and (b) above the ex..
How much heat is released when 4.50 g of methane gas is burned CH4 (g) + 2O2(g) -> CO2 (g) + 2H2O(l) H=-890kJ
A stream of air (21% O2 m, the rest N2) flowing at a rate of 10.0 kg/h is to be mixed with a stream of CO2 inside a mixer. The CO2 enters the mixer at a rate of 20.0 m/h at 150 ?C and 1.5 bar. What is the mole percent of CO2 in the product stream
you observed that a high dilution of a young culture was plated on a medium known to support its growth, but after 48 hours of incubation, the plate showed no growth. Give two possible explanations for these results.
What volume in milliliters of 9.950x10^-2M sodium hydroxide solution is required to reach the equivalence point in the complete titration
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