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One swimmer in a relay race has a 0.485 s lead and is swimming at a constant speed of 3.84 m/s. He has 48.5 m to swim before reaching the end of the pool. A second swimmer moves in the same direction as the leader. What constant speed must the second swimmer have in order to catch up to the leader at the end of the pool?
How many grams of NaCl are contained in 350. mL of a 0.103 M solution of sodium chloride?
what product would you obtain after evaporation of the water from the sodium hydroxide layer before acidifying and filtering the layer
A 2.2g sample of a small protein having a molecular weight of 42,000 g/mol is dissolved in 45.6 mL of water at 23 degrees C. What is the osmotic pressure of the solution
Given that the nuclidic masses of 238U = 238.0508 amu and an a particle = 4.0026 amu, calculate the mass of 234Th in units of g/mol.
What is the pH of a solution that mixes 30mL of 0.01M CH3COOH with 30mL 0.0075M NaCH3CO2? (Assume the volumes are additive
An aqueous solution of sodium chloride in an electrolytic cell is subjected to a current of 2.50 amps for 15.0 minutes. How many mL of chlorine gas are collected at 25.0oC if the pressure if 750.0 torr
what is the theorectical yield of disulfure chloride? what mass of the excess reactant reamains when the reaction is completed?
A buffer was prepared by adding 2.4 g of ammonium nitrate to 100 mL of 0.30 M ammonia (Kb = 1.8 x 10^-5). To this solution was then added 10.0 mL of 0.30 M sodium hydroxide, what is the new pH
calcium carbonate , CaCO3, reacts with stomach acid (HCl, hydrochloric acid) according to the following equation: CaCO3(s) + 2HCl(aq) > CaCl2(aq) + H2O(l) +CO2(g). one tablet of tums, an antacid, contains 500.0 mg of CaCO3. if one tablet of tums i..
A mineral has a face centered cubic arrangement of its atoms and an edge of the unit cell is 565.685 pm. the density of this mineral is 11.008 g/mL. Determine the radius of an atom, the packing efficiency, and molar mass.
Write a brief discussion of the bond dipoles of iodomethane and the corresponding Grignard reagent.
A 771 mL gas sample at STP is compressed to a volume of 242 mL, and the temperature is increased to 31?C. What is the new pressure of the gas in Pa
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