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A japanese car is advertised as having a gas mileage of 15 km/L. Convert this rating to miles per gallon.
What is the molarity of a solution of vinegar that is 5.00 % by mass acetic acid (CH3CO2H) and has a density of 1.01 g/mL.
If 55.0 mL of ethanol {rm{(density}} = 0.789;{rm{g}}/{{rm{mL}}})) initially at 9.0^circ C is mixed with 55.0 mL of water {rm{(density}} = 1.0;{rm{g}}/{{rm{mL}}}) initially at 28.1^circ C in an insulated beaker, and assuming that no heat is lost, w..
What is the mass in grams of CO2 that would be produced if 52.0 g of C5H8O4 were allowed to react completely in excess oxygen?
A solution of ammonia and water contains 4.20×10^25 water molecules and 6.90×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
The half life of polonium-210 is 138.4 days. How many milligrams of polonium-210 remain after 415.2 days if you start with 2.0 mg of the isotope?
Calculate the pressure inside the graduated cylinder it the height of the water is 5mm higher than the water in the trough. The atmospheric pressure is 760 mm Hg
How much heat does your body lose when 1.5 g of sweat evaporates from your skin at 25 C? (Assume that the sweat is only water.) The heat of vaporization of water at 25 C is 44.0 kJ/mole.
Molarity is only one of many ways to express concentration. Another is percent mass per volume or %(m/v). For example, vinegar usually contains about 5 %(m/v) acetic acid(5g acetic acid/100 mL vinegar)
Does a mutation causing a substitution of one base pair in a strand of DNA necessarily result in a new amino acid in the protein coded for that gene? Explain.
Calculate the theoretical ph of one of your buffer at 0^0 C. Assume that room temperature is 22^0 C. If none of your buffer is listed on the table of changing pka with temperature, do this problem for TRIS at ph 8.0.
Write down the full Hamiltonian for a He atom moving freely in space, i.e., there is no external potential. b) Now assume there is no repulsion between the electrons
What should the analyst do to accuratley determine the concentration for the unknown using Beer's Law? Extending the calibration curve or using the equation for the line are not correct answers to this equation.
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